* WARN_ONCE from nfsd_break_one_deleg
@ 2024-03-26 15:04 Donald Buczek
2024-03-26 16:42 ` Chuck Lever
0 siblings, 1 reply; 6+ messages in thread
From: Donald Buczek @ 2024-03-26 15:04 UTC (permalink / raw
To: linux-nfs, it+linux
Hi,
we just got this on a nfs file server on 6.6.12 :
[2719554.674554] receive_cb_reply: Got unrecognized reply: calldir 0x1 xpt_bc_xprt 00000000432042d3 xid c369f54d
[2719555.391416] receive_cb_reply: Got unrecognized reply: calldir 0x1 xpt_bc_xprt 0000000017cc0507 xid d6018727
[2719555.742118] receive_cb_reply: Got unrecognized reply: calldir 0x1 xpt_bc_xprt 000000008f2509ff xid 83d0248e
[2719555.742566] receive_cb_reply: Got unrecognized reply: calldir 0x1 xpt_bc_xprt 00000000637a135a xid 7064546d
[2719555.742803] receive_cb_reply: Got unrecognized reply: calldir 0x1 xpt_bc_xprt 0000000044ea3c51 xid a184bbe5
[2719555.742836] receive_cb_reply: Got unrecognized reply: calldir 0x1 xpt_bc_xprt 00000000b6992e65 xid ed3fe82e
[2719555.785358] receive_cb_reply: Got unrecognized reply: calldir 0x1 xpt_bc_xprt 0000000044ea3c51 xid a384bbe5
[2719588.733414] receive_cb_reply: Got unrecognized reply: calldir 0x1 xpt_bc_xprt 000000008f2509ff xid 89d0248e
[2719592.067221] receive_cb_reply: Got unrecognized reply: calldir 0x1 xpt_bc_xprt 00000000b6992e65 xid f33fe82e
[2719807.431344] receive_cb_reply: Got unrecognized reply: calldir 0x1 xpt_bc_xprt 00000000fd87f88f xid 28b51379
[2719838.510792] receive_cb_reply: Got unrecognized reply: calldir 0x1 xpt_bc_xprt 00000000432042d3 xid fa69f54d
[2719852.493779] receive_cb_reply: Got unrecognized reply: calldir 0x1 xpt_bc_xprt 00000000ac1e99fe xid a16378bb
[2719852.494853] receive_cb_reply: Got unrecognized reply: calldir 0x1 xpt_bc_xprt 0000000017cc0507 xid 0f028727
[2719852.515457] receive_cb_reply: Got unrecognized reply: calldir 0x1 xpt_bc_xprt 0000000017cc0507 xid 10028727
[2719917.753429] ------------[ cut here ]------------
[2719917.758951] WARNING: CPU: 1 PID: 1448 at fs/nfsd/nfs4state.c:4939 nfsd_break_deleg_cb+0x115/0x190 [nfsd]
[2719917.769208] Modules linked in: af_packet xt_nat xt_tcpudp iptable_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 rpcsec_gss_krb5 nfsv4 nfs i915 iosf_mbi drm_buddy drm_display_helper ttm intel_gtt video 8021q garp stp mrp llc input_leds x86_pkg_temp_thermal led_class hid_generic usbhid coretemp kvm_intel kvm irqbypass tg3 libphy smartpqi mgag200 i2c_algo_bit efi_pstore iTCO_wdt i40e crc32c_intel wmi_bmof pstore iTCO_vendor_support wmi ipmi_si nfsd auth_rpcgss oid_registry nfs_acl lockd grace sunrpc efivarfs ip_tables x_tables ipv6 autofs4
[2719917.818740] CPU: 1 PID: 1448 Comm: nfsd Not tainted 6.6.12.mx64.461 #1
[2719917.825777] Hardware name: Dell Inc. PowerEdge T440/021KCD, BIOS 2.12.2 07/09/2021
[2719917.833781] RIP: 0010:nfsd_break_deleg_cb+0x115/0x190 [nfsd]
[2719917.839911] Code: 00 00 00 e8 3d ae e8 e0 e9 5f ff ff ff 48 89 df be 01 00 00 00 e8 8b 1f 3d e1 48 8d bb 98 00 00 00 e8 ef 10 01 00 84 c0 75 8a <0f> 0b eb 86 65 8b 05 0c 66 e0 5f 89 c0 48 0f a3 05 d6 1a 75 e2 0f
[2719917.859303] RSP: 0018:ffffc9000bae7b70 EFLAGS: 00010246
[2719917.864962] RAX: 0000000000000000 RBX: ffff8881e2fd6000 RCX: 0000000000000024
[2719917.872520] RDX: ffff8881e2fd60c8 RSI: ffff889086d5de00 RDI: 0000000000000200
[2719917.880050] RBP: ffff889301aa812c R08: 0000000000033580 R09: 0000000000000000
[2719917.887575] R10: ffff889ef63b20d8 R11: 0000000000000000 R12: ffff888104cfb290
[2719917.895095] R13: ffff889301aa8118 R14: ffff88989c8ace00 R15: ffff888104cfb290
[2719917.902625] FS: 0000000000000000(0000) GS:ffff88a03fc00000(0000) knlGS:0000000000000000
[2719917.911094] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[2719917.917236] CR2: 00007fb8a1cfc418 CR3: 000000000262c006 CR4: 00000000007706e0
[2719917.924760] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[2719917.932285] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[2719917.939833] PKRU: 55555554
[2719917.942971] Call Trace:
[2719917.945834] <TASK>
[2719917.948344] ? __warn+0x81/0x140
[2719917.951983] ? nfsd_break_deleg_cb+0x115/0x190 [nfsd]
[2719917.957470] ? report_bug+0x171/0x1a0
[2719917.961562] ? handle_bug+0x3c/0x70
[2719917.965459] ? exc_invalid_op+0x17/0x70
[2719917.969715] ? asm_exc_invalid_op+0x1a/0x20
[2719917.974317] ? nfsd_break_deleg_cb+0x115/0x190 [nfsd]
[2719917.979820] __break_lease+0x24b/0x7c0
[2719917.983991] ? __pfx_nfsd_acceptable+0x10/0x10 [nfsd]
[2719917.989495] nfs4_get_vfs_file+0x195/0x380 [nfsd]
[2719917.994740] ? prepare_creds+0x14c/0x240
[2719917.999164] nfsd4_process_open2+0x3ed/0x16b0 [nfsd]
[2719918.004570] ? nfsd_permission+0x4e/0x100 [nfsd]
[2719918.009618] ? fh_verify+0x17b/0x8a0 [nfsd]
[2719918.014243] nfsd4_open+0x6ae/0xcd0 [nfsd]
[2719918.018777] ? nfsd4_encode_operation+0xa6/0x290 [nfsd]
[2719918.024524] nfsd4_proc_compound+0x2f2/0x6a0 [nfsd]
[2719918.029922] nfsd_dispatch+0xee/0x220 [nfsd]
[2719918.034619] ? __pfx_nfsd+0x10/0x10 [nfsd]
[2719918.039144] svc_process_common+0x307/0x730 [sunrpc]
[2719918.044551] ? __pfx_nfsd_dispatch+0x10/0x10 [nfsd]
[2719918.049883] ? __pfx_nfsd+0x10/0x10 [nfsd]
[2719918.054404] svc_process+0x131/0x180 [sunrpc]
[2719918.059171] nfsd+0x84/0xd0 [nfsd]
[2719918.063012] kthread+0xe5/0x120
[2719918.066539] ? __pfx_kthread+0x10/0x10
[2719918.070664] ret_from_fork+0x31/0x50
[2719918.074611] ? __pfx_kthread+0x10/0x10
[2719918.078735] ret_from_fork_asm+0x1b/0x30
[2719918.083018] </TASK>
[2719918.085563] ---[ end trace 0000000000000000 ]---
nfsd_break_deleg_cb+0x115 is the `WARN_ON_ONCE(!nfsd4_run_cb(&dp->dl_recall))` in nfsd_break_one_deleg() in our compilation
I think that means, that the callback is already scheduled?
One nfs client hung trying to mount something from that server.
Best
Donald
--
Donald Buczek
buczek@molgen.mpg.de
Tel: +49 30 8413 1433
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: WARN_ONCE from nfsd_break_one_deleg
2024-03-26 15:04 WARN_ONCE from nfsd_break_one_deleg Donald Buczek
@ 2024-03-26 16:42 ` Chuck Lever
2024-03-27 1:59 ` Dai Ngo
0 siblings, 1 reply; 6+ messages in thread
From: Chuck Lever @ 2024-03-26 16:42 UTC (permalink / raw
To: Donald Buczek, linux-nfs, it+linux
On 3/26/24 11:04 AM, Donald Buczek wrote:
> Hi,
>
> we just got this on a nfs file server on 6.6.12 :
>
> [2719554.674554] receive_cb_reply: Got unrecognized reply: calldir 0x1 xpt_bc_xprt 00000000432042d3 xid c369f54d
> [2719555.391416] receive_cb_reply: Got unrecognized reply: calldir 0x1 xpt_bc_xprt 0000000017cc0507 xid d6018727
> [2719555.742118] receive_cb_reply: Got unrecognized reply: calldir 0x1 xpt_bc_xprt 000000008f2509ff xid 83d0248e
> [2719555.742566] receive_cb_reply: Got unrecognized reply: calldir 0x1 xpt_bc_xprt 00000000637a135a xid 7064546d
> [2719555.742803] receive_cb_reply: Got unrecognized reply: calldir 0x1 xpt_bc_xprt 0000000044ea3c51 xid a184bbe5
> [2719555.742836] receive_cb_reply: Got unrecognized reply: calldir 0x1 xpt_bc_xprt 00000000b6992e65 xid ed3fe82e
> [2719555.785358] receive_cb_reply: Got unrecognized reply: calldir 0x1 xpt_bc_xprt 0000000044ea3c51 xid a384bbe5
> [2719588.733414] receive_cb_reply: Got unrecognized reply: calldir 0x1 xpt_bc_xprt 000000008f2509ff xid 89d0248e
> [2719592.067221] receive_cb_reply: Got unrecognized reply: calldir 0x1 xpt_bc_xprt 00000000b6992e65 xid f33fe82e
> [2719807.431344] receive_cb_reply: Got unrecognized reply: calldir 0x1 xpt_bc_xprt 00000000fd87f88f xid 28b51379
> [2719838.510792] receive_cb_reply: Got unrecognized reply: calldir 0x1 xpt_bc_xprt 00000000432042d3 xid fa69f54d
> [2719852.493779] receive_cb_reply: Got unrecognized reply: calldir 0x1 xpt_bc_xprt 00000000ac1e99fe xid a16378bb
> [2719852.494853] receive_cb_reply: Got unrecognized reply: calldir 0x1 xpt_bc_xprt 0000000017cc0507 xid 0f028727
> [2719852.515457] receive_cb_reply: Got unrecognized reply: calldir 0x1 xpt_bc_xprt 0000000017cc0507 xid 10028727
These clients are sending NFSv4 callback replies that the server does
not have a waiting XID for. It's a sign of a significant communication
mix-up between the server and client.
It would help us to get some details about your clients, the NFS version
in use, and how long you've been using this kernel. Also, a raw packet
capture might shed a little more light on the issue.
> [2719917.753429] ------------[ cut here ]------------
> [2719917.758951] WARNING: CPU: 1 PID: 1448 at fs/nfsd/nfs4state.c:4939 nfsd_break_deleg_cb+0x115/0x190 [nfsd]
> [2719917.769208] Modules linked in: af_packet xt_nat xt_tcpudp iptable_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 rpcsec_gss_krb5 nfsv4 nfs i915 iosf_mbi drm_buddy drm_display_helper ttm intel_gtt video 8021q garp stp mrp llc input_leds x86_pkg_temp_thermal led_class hid_generic usbhid coretemp kvm_intel kvm irqbypass tg3 libphy smartpqi mgag200 i2c_algo_bit efi_pstore iTCO_wdt i40e crc32c_intel wmi_bmof pstore iTCO_vendor_support wmi ipmi_si nfsd auth_rpcgss oid_registry nfs_acl lockd grace sunrpc efivarfs ip_tables x_tables ipv6 autofs4
> [2719917.818740] CPU: 1 PID: 1448 Comm: nfsd Not tainted 6.6.12.mx64.461 #1
> [2719917.825777] Hardware name: Dell Inc. PowerEdge T440/021KCD, BIOS 2.12.2 07/09/2021
> [2719917.833781] RIP: 0010:nfsd_break_deleg_cb+0x115/0x190 [nfsd]
> [2719917.839911] Code: 00 00 00 e8 3d ae e8 e0 e9 5f ff ff ff 48 89 df be 01 00 00 00 e8 8b 1f 3d e1 48 8d bb 98 00 00 00 e8 ef 10 01 00 84 c0 75 8a <0f> 0b eb 86 65 8b 05 0c 66 e0 5f 89 c0 48 0f a3 05 d6 1a 75 e2 0f
> [2719917.859303] RSP: 0018:ffffc9000bae7b70 EFLAGS: 00010246
> [2719917.864962] RAX: 0000000000000000 RBX: ffff8881e2fd6000 RCX: 0000000000000024
> [2719917.872520] RDX: ffff8881e2fd60c8 RSI: ffff889086d5de00 RDI: 0000000000000200
> [2719917.880050] RBP: ffff889301aa812c R08: 0000000000033580 R09: 0000000000000000
> [2719917.887575] R10: ffff889ef63b20d8 R11: 0000000000000000 R12: ffff888104cfb290
> [2719917.895095] R13: ffff889301aa8118 R14: ffff88989c8ace00 R15: ffff888104cfb290
> [2719917.902625] FS: 0000000000000000(0000) GS:ffff88a03fc00000(0000) knlGS:0000000000000000
> [2719917.911094] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> [2719917.917236] CR2: 00007fb8a1cfc418 CR3: 000000000262c006 CR4: 00000000007706e0
> [2719917.924760] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> [2719917.932285] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
> [2719917.939833] PKRU: 55555554
> [2719917.942971] Call Trace:
> [2719917.945834] <TASK>
> [2719917.948344] ? __warn+0x81/0x140
> [2719917.951983] ? nfsd_break_deleg_cb+0x115/0x190 [nfsd]
> [2719917.957470] ? report_bug+0x171/0x1a0
> [2719917.961562] ? handle_bug+0x3c/0x70
> [2719917.965459] ? exc_invalid_op+0x17/0x70
> [2719917.969715] ? asm_exc_invalid_op+0x1a/0x20
> [2719917.974317] ? nfsd_break_deleg_cb+0x115/0x190 [nfsd]
> [2719917.979820] __break_lease+0x24b/0x7c0
> [2719917.983991] ? __pfx_nfsd_acceptable+0x10/0x10 [nfsd]
> [2719917.989495] nfs4_get_vfs_file+0x195/0x380 [nfsd]
> [2719917.994740] ? prepare_creds+0x14c/0x240
> [2719917.999164] nfsd4_process_open2+0x3ed/0x16b0 [nfsd]
> [2719918.004570] ? nfsd_permission+0x4e/0x100 [nfsd]
> [2719918.009618] ? fh_verify+0x17b/0x8a0 [nfsd]
> [2719918.014243] nfsd4_open+0x6ae/0xcd0 [nfsd]
> [2719918.018777] ? nfsd4_encode_operation+0xa6/0x290 [nfsd]
> [2719918.024524] nfsd4_proc_compound+0x2f2/0x6a0 [nfsd]
> [2719918.029922] nfsd_dispatch+0xee/0x220 [nfsd]
> [2719918.034619] ? __pfx_nfsd+0x10/0x10 [nfsd]
> [2719918.039144] svc_process_common+0x307/0x730 [sunrpc]
> [2719918.044551] ? __pfx_nfsd_dispatch+0x10/0x10 [nfsd]
> [2719918.049883] ? __pfx_nfsd+0x10/0x10 [nfsd]
> [2719918.054404] svc_process+0x131/0x180 [sunrpc]
> [2719918.059171] nfsd+0x84/0xd0 [nfsd]
> [2719918.063012] kthread+0xe5/0x120
> [2719918.066539] ? __pfx_kthread+0x10/0x10
> [2719918.070664] ret_from_fork+0x31/0x50
> [2719918.074611] ? __pfx_kthread+0x10/0x10
> [2719918.078735] ret_from_fork_asm+0x1b/0x30
> [2719918.083018] </TASK>
> [2719918.085563] ---[ end trace 0000000000000000 ]---
>
> nfsd_break_deleg_cb+0x115 is the `WARN_ON_ONCE(!nfsd4_run_cb(&dp->dl_recall))` in nfsd_break_one_deleg() in our compilation
>
> I think that means, that the callback is already scheduled?
>
> One nfs client hung trying to mount something from that server.
>
> Best
>
> Donald
>
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: WARN_ONCE from nfsd_break_one_deleg
2024-03-26 16:42 ` Chuck Lever
@ 2024-03-27 1:59 ` Dai Ngo
2024-03-27 11:07 ` Jeff Layton
0 siblings, 1 reply; 6+ messages in thread
From: Dai Ngo @ 2024-03-27 1:59 UTC (permalink / raw
To: Chuck Lever, Donald Buczek, linux-nfs, it+linux
On 3/26/24 9:42 AM, Chuck Lever wrote:
>
> On 3/26/24 11:04 AM, Donald Buczek wrote:
>> Hi,
>>
>> we just got this on a nfs file server on 6.6.12 :
>>
>> [2719554.674554] receive_cb_reply: Got unrecognized reply: calldir
>> 0x1 xpt_bc_xprt 00000000432042d3 xid c369f54d
>> [2719555.391416] receive_cb_reply: Got unrecognized reply: calldir
>> 0x1 xpt_bc_xprt 0000000017cc0507 xid d6018727
>> [2719555.742118] receive_cb_reply: Got unrecognized reply: calldir
>> 0x1 xpt_bc_xprt 000000008f2509ff xid 83d0248e
>> [2719555.742566] receive_cb_reply: Got unrecognized reply: calldir
>> 0x1 xpt_bc_xprt 00000000637a135a xid 7064546d
>> [2719555.742803] receive_cb_reply: Got unrecognized reply: calldir
>> 0x1 xpt_bc_xprt 0000000044ea3c51 xid a184bbe5
>> [2719555.742836] receive_cb_reply: Got unrecognized reply: calldir
>> 0x1 xpt_bc_xprt 00000000b6992e65 xid ed3fe82e
>> [2719555.785358] receive_cb_reply: Got unrecognized reply: calldir
>> 0x1 xpt_bc_xprt 0000000044ea3c51 xid a384bbe5
>> [2719588.733414] receive_cb_reply: Got unrecognized reply: calldir
>> 0x1 xpt_bc_xprt 000000008f2509ff xid 89d0248e
>> [2719592.067221] receive_cb_reply: Got unrecognized reply: calldir
>> 0x1 xpt_bc_xprt 00000000b6992e65 xid f33fe82e
>> [2719807.431344] receive_cb_reply: Got unrecognized reply: calldir
>> 0x1 xpt_bc_xprt 00000000fd87f88f xid 28b51379
>> [2719838.510792] receive_cb_reply: Got unrecognized reply: calldir
>> 0x1 xpt_bc_xprt 00000000432042d3 xid fa69f54d
>> [2719852.493779] receive_cb_reply: Got unrecognized reply: calldir
>> 0x1 xpt_bc_xprt 00000000ac1e99fe xid a16378bb
>> [2719852.494853] receive_cb_reply: Got unrecognized reply: calldir
>> 0x1 xpt_bc_xprt 0000000017cc0507 xid 0f028727
>> [2719852.515457] receive_cb_reply: Got unrecognized reply: calldir
>> 0x1 xpt_bc_xprt 0000000017cc0507 xid 10028727
>
> These clients are sending NFSv4 callback replies that the server does
> not have a waiting XID for. It's a sign of a significant communication
> mix-up between the server and client.
>
> It would help us to get some details about your clients, the NFS
> version in use, and how long you've been using this kernel. Also, a
> raw packet capture might shed a little more light on the issue.
This warning has has no effect on the server operation and was remove.
See commit 05a4b58301c3.
-Dai
>
>> [2719917.753429] ------------[ cut here ]------------
>> [2719917.758951] WARNING: CPU: 1 PID: 1448 at
>> fs/nfsd/nfs4state.c:4939 nfsd_break_deleg_cb+0x115/0x190 [nfsd]
>> [2719917.769208] Modules linked in: af_packet xt_nat xt_tcpudp
>> iptable_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4
>> rpcsec_gss_krb5 nfsv4 nfs i915 iosf_mbi drm_buddy drm_display_helper
>> ttm intel_gtt video 8021q garp stp mrp llc input_leds
>> x86_pkg_temp_thermal led_class hid_generic usbhid coretemp kvm_intel
>> kvm irqbypass tg3 libphy smartpqi mgag200 i2c_algo_bit efi_pstore
>> iTCO_wdt i40e crc32c_intel wmi_bmof pstore iTCO_vendor_support wmi
>> ipmi_si nfsd auth_rpcgss oid_registry nfs_acl lockd grace sunrpc
>> efivarfs ip_tables x_tables ipv6 autofs4
>> [2719917.818740] CPU: 1 PID: 1448 Comm: nfsd Not tainted
>> 6.6.12.mx64.461 #1
>> [2719917.825777] Hardware name: Dell Inc. PowerEdge T440/021KCD, BIOS
>> 2.12.2 07/09/2021
>> [2719917.833781] RIP: 0010:nfsd_break_deleg_cb+0x115/0x190 [nfsd]
>> [2719917.839911] Code: 00 00 00 e8 3d ae e8 e0 e9 5f ff ff ff 48 89
>> df be 01 00 00 00 e8 8b 1f 3d e1 48 8d bb 98 00 00 00 e8 ef 10 01 00
>> 84 c0 75 8a <0f> 0b eb 86 65 8b 05 0c 66 e0 5f 89 c0 48 0f a3 05 d6
>> 1a 75 e2 0f
>> [2719917.859303] RSP: 0018:ffffc9000bae7b70 EFLAGS: 00010246
>> [2719917.864962] RAX: 0000000000000000 RBX: ffff8881e2fd6000 RCX:
>> 0000000000000024
>> [2719917.872520] RDX: ffff8881e2fd60c8 RSI: ffff889086d5de00 RDI:
>> 0000000000000200
>> [2719917.880050] RBP: ffff889301aa812c R08: 0000000000033580 R09:
>> 0000000000000000
>> [2719917.887575] R10: ffff889ef63b20d8 R11: 0000000000000000 R12:
>> ffff888104cfb290
>> [2719917.895095] R13: ffff889301aa8118 R14: ffff88989c8ace00 R15:
>> ffff888104cfb290
>> [2719917.902625] FS: 0000000000000000(0000)
>> GS:ffff88a03fc00000(0000) knlGS:0000000000000000
>> [2719917.911094] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
>> [2719917.917236] CR2: 00007fb8a1cfc418 CR3: 000000000262c006 CR4:
>> 00000000007706e0
>> [2719917.924760] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
>> 0000000000000000
>> [2719917.932285] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7:
>> 0000000000000400
>> [2719917.939833] PKRU: 55555554
>> [2719917.942971] Call Trace:
>> [2719917.945834] <TASK>
>> [2719917.948344] ? __warn+0x81/0x140
>> [2719917.951983] ? nfsd_break_deleg_cb+0x115/0x190 [nfsd]
>> [2719917.957470] ? report_bug+0x171/0x1a0
>> [2719917.961562] ? handle_bug+0x3c/0x70
>> [2719917.965459] ? exc_invalid_op+0x17/0x70
>> [2719917.969715] ? asm_exc_invalid_op+0x1a/0x20
>> [2719917.974317] ? nfsd_break_deleg_cb+0x115/0x190 [nfsd]
>> [2719917.979820] __break_lease+0x24b/0x7c0
>> [2719917.983991] ? __pfx_nfsd_acceptable+0x10/0x10 [nfsd]
>> [2719917.989495] nfs4_get_vfs_file+0x195/0x380 [nfsd]
>> [2719917.994740] ? prepare_creds+0x14c/0x240
>> [2719917.999164] nfsd4_process_open2+0x3ed/0x16b0 [nfsd]
>> [2719918.004570] ? nfsd_permission+0x4e/0x100 [nfsd]
>> [2719918.009618] ? fh_verify+0x17b/0x8a0 [nfsd]
>> [2719918.014243] nfsd4_open+0x6ae/0xcd0 [nfsd]
>> [2719918.018777] ? nfsd4_encode_operation+0xa6/0x290 [nfsd]
>> [2719918.024524] nfsd4_proc_compound+0x2f2/0x6a0 [nfsd]
>> [2719918.029922] nfsd_dispatch+0xee/0x220 [nfsd]
>> [2719918.034619] ? __pfx_nfsd+0x10/0x10 [nfsd]
>> [2719918.039144] svc_process_common+0x307/0x730 [sunrpc]
>> [2719918.044551] ? __pfx_nfsd_dispatch+0x10/0x10 [nfsd]
>> [2719918.049883] ? __pfx_nfsd+0x10/0x10 [nfsd]
>> [2719918.054404] svc_process+0x131/0x180 [sunrpc]
>> [2719918.059171] nfsd+0x84/0xd0 [nfsd]
>> [2719918.063012] kthread+0xe5/0x120
>> [2719918.066539] ? __pfx_kthread+0x10/0x10
>> [2719918.070664] ret_from_fork+0x31/0x50
>> [2719918.074611] ? __pfx_kthread+0x10/0x10
>> [2719918.078735] ret_from_fork_asm+0x1b/0x30
>> [2719918.083018] </TASK>
>> [2719918.085563] ---[ end trace 0000000000000000 ]---
>>
>> nfsd_break_deleg_cb+0x115 is the
>> `WARN_ON_ONCE(!nfsd4_run_cb(&dp->dl_recall))` in
>> nfsd_break_one_deleg() in our compilation
>>
>> I think that means, that the callback is already scheduled?
>>
>> One nfs client hung trying to mount something from that server.
>>
>> Best
>>
>> Donald
>>
>
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: WARN_ONCE from nfsd_break_one_deleg
2024-03-27 1:59 ` Dai Ngo
@ 2024-03-27 11:07 ` Jeff Layton
2024-03-27 12:31 ` Donald Buczek
0 siblings, 1 reply; 6+ messages in thread
From: Jeff Layton @ 2024-03-27 11:07 UTC (permalink / raw
To: Dai Ngo, Chuck Lever, Donald Buczek, linux-nfs, it+linux
On Tue, 2024-03-26 at 18:59 -0700, Dai Ngo wrote:
> On 3/26/24 9:42 AM, Chuck Lever wrote:
> >
> > On 3/26/24 11:04 AM, Donald Buczek wrote:
> > > Hi,
> > >
> > > we just got this on a nfs file server on 6.6.12 :
> > >
> > > [2719554.674554] receive_cb_reply: Got unrecognized reply: calldir
> > > 0x1 xpt_bc_xprt 00000000432042d3 xid c369f54d
> > > [2719555.391416] receive_cb_reply: Got unrecognized reply: calldir
> > > 0x1 xpt_bc_xprt 0000000017cc0507 xid d6018727
> > > [2719555.742118] receive_cb_reply: Got unrecognized reply: calldir
> > > 0x1 xpt_bc_xprt 000000008f2509ff xid 83d0248e
> > > [2719555.742566] receive_cb_reply: Got unrecognized reply: calldir
> > > 0x1 xpt_bc_xprt 00000000637a135a xid 7064546d
> > > [2719555.742803] receive_cb_reply: Got unrecognized reply: calldir
> > > 0x1 xpt_bc_xprt 0000000044ea3c51 xid a184bbe5
> > > [2719555.742836] receive_cb_reply: Got unrecognized reply: calldir
> > > 0x1 xpt_bc_xprt 00000000b6992e65 xid ed3fe82e
> > > [2719555.785358] receive_cb_reply: Got unrecognized reply: calldir
> > > 0x1 xpt_bc_xprt 0000000044ea3c51 xid a384bbe5
> > > [2719588.733414] receive_cb_reply: Got unrecognized reply: calldir
> > > 0x1 xpt_bc_xprt 000000008f2509ff xid 89d0248e
> > > [2719592.067221] receive_cb_reply: Got unrecognized reply: calldir
> > > 0x1 xpt_bc_xprt 00000000b6992e65 xid f33fe82e
> > > [2719807.431344] receive_cb_reply: Got unrecognized reply: calldir
> > > 0x1 xpt_bc_xprt 00000000fd87f88f xid 28b51379
> > > [2719838.510792] receive_cb_reply: Got unrecognized reply: calldir
> > > 0x1 xpt_bc_xprt 00000000432042d3 xid fa69f54d
> > > [2719852.493779] receive_cb_reply: Got unrecognized reply: calldir
> > > 0x1 xpt_bc_xprt 00000000ac1e99fe xid a16378bb
> > > [2719852.494853] receive_cb_reply: Got unrecognized reply: calldir
> > > 0x1 xpt_bc_xprt 0000000017cc0507 xid 0f028727
> > > [2719852.515457] receive_cb_reply: Got unrecognized reply: calldir
> > > 0x1 xpt_bc_xprt 0000000017cc0507 xid 10028727
> >
> > These clients are sending NFSv4 callback replies that the server does
> > not have a waiting XID for. It's a sign of a significant communication
> > mix-up between the server and client.
> >
> > It would help us to get some details about your clients, the NFS
> > version in use, and how long you've been using this kernel. Also, a
> > raw packet capture might shed a little more light on the issue.
>
> This warning has has no effect on the server operation and was remove.
> See commit 05a4b58301c3.
>
Yes. It usually just means the job is already scheduled or is running,
which is harmless. That said, that can be indicative of the workqueue
job being stuck.
Typically, backchannel jobs should run quickly, but lease breaks can
come in quick succession too, so this warning never meant much.
>
> >
> > > [2719917.753429] ------------[ cut here ]------------
> > > [2719917.758951] WARNING: CPU: 1 PID: 1448 at
> > > fs/nfsd/nfs4state.c:4939 nfsd_break_deleg_cb+0x115/0x190 [nfsd]
> > > [2719917.769208] Modules linked in: af_packet xt_nat xt_tcpudp
> > > iptable_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4
> > > rpcsec_gss_krb5 nfsv4 nfs i915 iosf_mbi drm_buddy drm_display_helper
> > > ttm intel_gtt video 8021q garp stp mrp llc input_leds
> > > x86_pkg_temp_thermal led_class hid_generic usbhid coretemp kvm_intel
> > > kvm irqbypass tg3 libphy smartpqi mgag200 i2c_algo_bit efi_pstore
> > > iTCO_wdt i40e crc32c_intel wmi_bmof pstore iTCO_vendor_support wmi
> > > ipmi_si nfsd auth_rpcgss oid_registry nfs_acl lockd grace sunrpc
> > > efivarfs ip_tables x_tables ipv6 autofs4
> > > [2719917.818740] CPU: 1 PID: 1448 Comm: nfsd Not tainted
> > > 6.6.12.mx64.461 #1
> > > [2719917.825777] Hardware name: Dell Inc. PowerEdge T440/021KCD, BIOS
> > > 2.12.2 07/09/2021
> > > [2719917.833781] RIP: 0010:nfsd_break_deleg_cb+0x115/0x190 [nfsd]
> > > [2719917.839911] Code: 00 00 00 e8 3d ae e8 e0 e9 5f ff ff ff 48 89
> > > df be 01 00 00 00 e8 8b 1f 3d e1 48 8d bb 98 00 00 00 e8 ef 10 01 00
> > > 84 c0 75 8a <0f> 0b eb 86 65 8b 05 0c 66 e0 5f 89 c0 48 0f a3 05 d6
> > > 1a 75 e2 0f
> > > [2719917.859303] RSP: 0018:ffffc9000bae7b70 EFLAGS: 00010246
> > > [2719917.864962] RAX: 0000000000000000 RBX: ffff8881e2fd6000 RCX:
> > > 0000000000000024
> > > [2719917.872520] RDX: ffff8881e2fd60c8 RSI: ffff889086d5de00 RDI:
> > > 0000000000000200
> > > [2719917.880050] RBP: ffff889301aa812c R08: 0000000000033580 R09:
> > > 0000000000000000
> > > [2719917.887575] R10: ffff889ef63b20d8 R11: 0000000000000000 R12:
> > > ffff888104cfb290
> > > [2719917.895095] R13: ffff889301aa8118 R14: ffff88989c8ace00 R15:
> > > ffff888104cfb290
> > > [2719917.902625] FS: 0000000000000000(0000)
> > > GS:ffff88a03fc00000(0000) knlGS:0000000000000000
> > > [2719917.911094] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> > > [2719917.917236] CR2: 00007fb8a1cfc418 CR3: 000000000262c006 CR4:
> > > 00000000007706e0
> > > [2719917.924760] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
> > > 0000000000000000
> > > [2719917.932285] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7:
> > > 0000000000000400
> > > [2719917.939833] PKRU: 55555554
> > > [2719917.942971] Call Trace:
> > > [2719917.945834] <TASK>
> > > [2719917.948344] ? __warn+0x81/0x140
> > > [2719917.951983] ? nfsd_break_deleg_cb+0x115/0x190 [nfsd]
> > > [2719917.957470] ? report_bug+0x171/0x1a0
> > > [2719917.961562] ? handle_bug+0x3c/0x70
> > > [2719917.965459] ? exc_invalid_op+0x17/0x70
> > > [2719917.969715] ? asm_exc_invalid_op+0x1a/0x20
> > > [2719917.974317] ? nfsd_break_deleg_cb+0x115/0x190 [nfsd]
> > > [2719917.979820] __break_lease+0x24b/0x7c0
> > > [2719917.983991] ? __pfx_nfsd_acceptable+0x10/0x10 [nfsd]
> > > [2719917.989495] nfs4_get_vfs_file+0x195/0x380 [nfsd]
> > > [2719917.994740] ? prepare_creds+0x14c/0x240
> > > [2719917.999164] nfsd4_process_open2+0x3ed/0x16b0 [nfsd]
> > > [2719918.004570] ? nfsd_permission+0x4e/0x100 [nfsd]
> > > [2719918.009618] ? fh_verify+0x17b/0x8a0 [nfsd]
> > > [2719918.014243] nfsd4_open+0x6ae/0xcd0 [nfsd]
> > > [2719918.018777] ? nfsd4_encode_operation+0xa6/0x290 [nfsd]
> > > [2719918.024524] nfsd4_proc_compound+0x2f2/0x6a0 [nfsd]
> > > [2719918.029922] nfsd_dispatch+0xee/0x220 [nfsd]
> > > [2719918.034619] ? __pfx_nfsd+0x10/0x10 [nfsd]
> > > [2719918.039144] svc_process_common+0x307/0x730 [sunrpc]
> > > [2719918.044551] ? __pfx_nfsd_dispatch+0x10/0x10 [nfsd]
> > > [2719918.049883] ? __pfx_nfsd+0x10/0x10 [nfsd]
> > > [2719918.054404] svc_process+0x131/0x180 [sunrpc]
> > > [2719918.059171] nfsd+0x84/0xd0 [nfsd]
> > > [2719918.063012] kthread+0xe5/0x120
> > > [2719918.066539] ? __pfx_kthread+0x10/0x10
> > > [2719918.070664] ret_from_fork+0x31/0x50
> > > [2719918.074611] ? __pfx_kthread+0x10/0x10
> > > [2719918.078735] ret_from_fork_asm+0x1b/0x30
> > > [2719918.083018] </TASK>
> > > [2719918.085563] ---[ end trace 0000000000000000 ]---
> > >
> > > nfsd_break_deleg_cb+0x115 is the
> > > `WARN_ON_ONCE(!nfsd4_run_cb(&dp->dl_recall))` in
> > > nfsd_break_one_deleg() in our compilation
> > >
> > > I think that means, that the callback is already scheduled?
> > >
> > > One nfs client hung trying to mount something from that server.
> > >
> > > Best
> > >
> > > Donald
> > >
> >
>
--
Jeff Layton <jlayton@kernel.org>
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: WARN_ONCE from nfsd_break_one_deleg
2024-03-27 11:07 ` Jeff Layton
@ 2024-03-27 12:31 ` Donald Buczek
2024-03-27 20:09 ` Rik Theys
0 siblings, 1 reply; 6+ messages in thread
From: Donald Buczek @ 2024-03-27 12:31 UTC (permalink / raw
To: Jeff Layton, Dai Ngo, Chuck Lever, linux-nfs, it+linux
On 3/27/24 12:07, Jeff Layton wrote:
> On Tue, 2024-03-26 at 18:59 -0700, Dai Ngo wrote:
>> On 3/26/24 9:42 AM, Chuck Lever wrote:
>>>
>>> On 3/26/24 11:04 AM, Donald Buczek wrote:
>>>> Hi,
>>>>
>>>> we just got this on a nfs file server on 6.6.12 :
>>>>
>>>> [2719554.674554] receive_cb_reply: Got unrecognized reply: calldir
>>>> 0x1 xpt_bc_xprt 00000000432042d3 xid c369f54d
>>>> [2719555.391416] receive_cb_reply: Got unrecognized reply: calldir
>>>> 0x1 xpt_bc_xprt 0000000017cc0507 xid d6018727
>>>> [2719555.742118] receive_cb_reply: Got unrecognized reply: calldir
>>>> 0x1 xpt_bc_xprt 000000008f2509ff xid 83d0248e
>>>> [2719555.742566] receive_cb_reply: Got unrecognized reply: calldir
>>>> 0x1 xpt_bc_xprt 00000000637a135a xid 7064546d
>>>> [2719555.742803] receive_cb_reply: Got unrecognized reply: calldir
>>>> 0x1 xpt_bc_xprt 0000000044ea3c51 xid a184bbe5
>>>> [2719555.742836] receive_cb_reply: Got unrecognized reply: calldir
>>>> 0x1 xpt_bc_xprt 00000000b6992e65 xid ed3fe82e
>>>> [2719555.785358] receive_cb_reply: Got unrecognized reply: calldir
>>>> 0x1 xpt_bc_xprt 0000000044ea3c51 xid a384bbe5
>>>> [2719588.733414] receive_cb_reply: Got unrecognized reply: calldir
>>>> 0x1 xpt_bc_xprt 000000008f2509ff xid 89d0248e
>>>> [2719592.067221] receive_cb_reply: Got unrecognized reply: calldir
>>>> 0x1 xpt_bc_xprt 00000000b6992e65 xid f33fe82e
>>>> [2719807.431344] receive_cb_reply: Got unrecognized reply: calldir
>>>> 0x1 xpt_bc_xprt 00000000fd87f88f xid 28b51379
>>>> [2719838.510792] receive_cb_reply: Got unrecognized reply: calldir
>>>> 0x1 xpt_bc_xprt 00000000432042d3 xid fa69f54d
>>>> [2719852.493779] receive_cb_reply: Got unrecognized reply: calldir
>>>> 0x1 xpt_bc_xprt 00000000ac1e99fe xid a16378bb
>>>> [2719852.494853] receive_cb_reply: Got unrecognized reply: calldir
>>>> 0x1 xpt_bc_xprt 0000000017cc0507 xid 0f028727
>>>> [2719852.515457] receive_cb_reply: Got unrecognized reply: calldir
>>>> 0x1 xpt_bc_xprt 0000000017cc0507 xid 10028727
>>>
>>> These clients are sending NFSv4 callback replies that the server does
>>> not have a waiting XID for. It's a sign of a significant communication
>>> mix-up between the server and client.
>>>
>>> It would help us to get some details about your clients, the NFS
>>> version in use, and how long you've been using this kernel. Also, a
>>> raw packet capture might shed a little more light on the issue.
This specific file server has been running 6.6 for about a month. It has been running 5.15 for over a year before.
All nfs clients are on 5.15 or 6.6.
Sorry for not providing enough information. The problem had strong user impact so we needed to resolve the situation quickly by rebooting the server to a 5.15 kernel. This in fact unblocked the hanging mounts on a client.
A user later reported, that he might have overloaded the file server from parallel writing jobs.
>> This warning has has no effect on the server operation and was remove.
>> See commit 05a4b58301c3.
Ok.
> Yes. It usually just means the job is already scheduled or is running,
> which is harmless. That said, that can be indicative of the workqueue
> job being stuck.
>
> Typically, backchannel jobs should run quickly, but lease breaks can
> come in quick succession too, so this warning never meant much.
Before we rebooted, I was able to run a script which takes some system data, including the stack traces of all tasks.
http://owww.molgen.mpg.de/~buczek/2024-03-26_sauterelles
Is the blocker
1 D root 11 2 0 80 0 - 0 rpc_sh Feb23 ? 00:00:18 \_ [kworker/u32:0+nfsd4_callbacks]
?
# cat /proc/11/task/11/stack
[<0>] rpc_shutdown_client+0xff/0x160 [sunrpc]
[<0>] nfsd4_process_cb_update+0x4c/0x280 [nfsd]
[<0>] nfsd4_run_cb_work+0xa3/0x160 [nfsd]
[<0>] process_one_work+0x13f/0x300
[<0>] worker_thread+0x2f5/0x410
[<0>] kthread+0xe5/0x120
[<0>] ret_from_fork+0x31/0x50
[<0>] ret_from_fork_asm+0x1b/0x30
rpc_shutdown_client+0xff is behind 'call schedule_timeout' in the expansion of `wait_event_timeout(destroy_wait, list_empty(&clnt->cl_tasks), 1*HZ);`.
So it is waiting for the second to pass, possibly in a loop waiting for list_empty(&clnt->cl_tasks).
I don't know if any guesses could be made out of this, though.
Thanks
Donald
>>>> [2719917.753429] ------------[ cut here ]------------
>>>> [2719917.758951] WARNING: CPU: 1 PID: 1448 at
>>>> fs/nfsd/nfs4state.c:4939 nfsd_break_deleg_cb+0x115/0x190 [nfsd]
>>>> [2719917.769208] Modules linked in: af_packet xt_nat xt_tcpudp
>>>> iptable_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4
>>>> rpcsec_gss_krb5 nfsv4 nfs i915 iosf_mbi drm_buddy drm_display_helper
>>>> ttm intel_gtt video 8021q garp stp mrp llc input_leds
>>>> x86_pkg_temp_thermal led_class hid_generic usbhid coretemp kvm_intel
>>>> kvm irqbypass tg3 libphy smartpqi mgag200 i2c_algo_bit efi_pstore
>>>> iTCO_wdt i40e crc32c_intel wmi_bmof pstore iTCO_vendor_support wmi
>>>> ipmi_si nfsd auth_rpcgss oid_registry nfs_acl lockd grace sunrpc
>>>> efivarfs ip_tables x_tables ipv6 autofs4
>>>> [2719917.818740] CPU: 1 PID: 1448 Comm: nfsd Not tainted
>>>> 6.6.12.mx64.461 #1
>>>> [2719917.825777] Hardware name: Dell Inc. PowerEdge T440/021KCD, BIOS
>>>> 2.12.2 07/09/2021
>>>> [2719917.833781] RIP: 0010:nfsd_break_deleg_cb+0x115/0x190 [nfsd]
>>>> [2719917.839911] Code: 00 00 00 e8 3d ae e8 e0 e9 5f ff ff ff 48 89
>>>> df be 01 00 00 00 e8 8b 1f 3d e1 48 8d bb 98 00 00 00 e8 ef 10 01 00
>>>> 84 c0 75 8a <0f> 0b eb 86 65 8b 05 0c 66 e0 5f 89 c0 48 0f a3 05 d6
>>>> 1a 75 e2 0f
>>>> [2719917.859303] RSP: 0018:ffffc9000bae7b70 EFLAGS: 00010246
>>>> [2719917.864962] RAX: 0000000000000000 RBX: ffff8881e2fd6000 RCX:
>>>> 0000000000000024
>>>> [2719917.872520] RDX: ffff8881e2fd60c8 RSI: ffff889086d5de00 RDI:
>>>> 0000000000000200
>>>> [2719917.880050] RBP: ffff889301aa812c R08: 0000000000033580 R09:
>>>> 0000000000000000
>>>> [2719917.887575] R10: ffff889ef63b20d8 R11: 0000000000000000 R12:
>>>> ffff888104cfb290
>>>> [2719917.895095] R13: ffff889301aa8118 R14: ffff88989c8ace00 R15:
>>>> ffff888104cfb290
>>>> [2719917.902625] FS: 0000000000000000(0000)
>>>> GS:ffff88a03fc00000(0000) knlGS:0000000000000000
>>>> [2719917.911094] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
>>>> [2719917.917236] CR2: 00007fb8a1cfc418 CR3: 000000000262c006 CR4:
>>>> 00000000007706e0
>>>> [2719917.924760] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
>>>> 0000000000000000
>>>> [2719917.932285] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7:
>>>> 0000000000000400
>>>> [2719917.939833] PKRU: 55555554
>>>> [2719917.942971] Call Trace:
>>>> [2719917.945834] <TASK>
>>>> [2719917.948344] ? __warn+0x81/0x140
>>>> [2719917.951983] ? nfsd_break_deleg_cb+0x115/0x190 [nfsd]
>>>> [2719917.957470] ? report_bug+0x171/0x1a0
>>>> [2719917.961562] ? handle_bug+0x3c/0x70
>>>> [2719917.965459] ? exc_invalid_op+0x17/0x70
>>>> [2719917.969715] ? asm_exc_invalid_op+0x1a/0x20
>>>> [2719917.974317] ? nfsd_break_deleg_cb+0x115/0x190 [nfsd]
>>>> [2719917.979820] __break_lease+0x24b/0x7c0
>>>> [2719917.983991] ? __pfx_nfsd_acceptable+0x10/0x10 [nfsd]
>>>> [2719917.989495] nfs4_get_vfs_file+0x195/0x380 [nfsd]
>>>> [2719917.994740] ? prepare_creds+0x14c/0x240
>>>> [2719917.999164] nfsd4_process_open2+0x3ed/0x16b0 [nfsd]
>>>> [2719918.004570] ? nfsd_permission+0x4e/0x100 [nfsd]
>>>> [2719918.009618] ? fh_verify+0x17b/0x8a0 [nfsd]
>>>> [2719918.014243] nfsd4_open+0x6ae/0xcd0 [nfsd]
>>>> [2719918.018777] ? nfsd4_encode_operation+0xa6/0x290 [nfsd]
>>>> [2719918.024524] nfsd4_proc_compound+0x2f2/0x6a0 [nfsd]
>>>> [2719918.029922] nfsd_dispatch+0xee/0x220 [nfsd]
>>>> [2719918.034619] ? __pfx_nfsd+0x10/0x10 [nfsd]
>>>> [2719918.039144] svc_process_common+0x307/0x730 [sunrpc]
>>>> [2719918.044551] ? __pfx_nfsd_dispatch+0x10/0x10 [nfsd]
>>>> [2719918.049883] ? __pfx_nfsd+0x10/0x10 [nfsd]
>>>> [2719918.054404] svc_process+0x131/0x180 [sunrpc]
>>>> [2719918.059171] nfsd+0x84/0xd0 [nfsd]
>>>> [2719918.063012] kthread+0xe5/0x120
>>>> [2719918.066539] ? __pfx_kthread+0x10/0x10
>>>> [2719918.070664] ret_from_fork+0x31/0x50
>>>> [2719918.074611] ? __pfx_kthread+0x10/0x10
>>>> [2719918.078735] ret_from_fork_asm+0x1b/0x30
>>>> [2719918.083018] </TASK>
>>>> [2719918.085563] ---[ end trace 0000000000000000 ]---
>>>>
>>>> nfsd_break_deleg_cb+0x115 is the
>>>> `WARN_ON_ONCE(!nfsd4_run_cb(&dp->dl_recall))` in
>>>> nfsd_break_one_deleg() in our compilation
>>>>
>>>> I think that means, that the callback is already scheduled?
>>>>
>>>> One nfs client hung trying to mount something from that server.
>>>>
>>>> Best
>>>>
>>>> Donald
>>>>
>>>
>>
>
--
Donald Buczek
buczek@molgen.mpg.de
Tel: +49 30 8413 1433
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: WARN_ONCE from nfsd_break_one_deleg
2024-03-27 12:31 ` Donald Buczek
@ 2024-03-27 20:09 ` Rik Theys
0 siblings, 0 replies; 6+ messages in thread
From: Rik Theys @ 2024-03-27 20:09 UTC (permalink / raw
To: Donald Buczek, Jeff Layton, Dai Ngo, Chuck Lever, linux-nfs,
it+linux
Hi,
On 3/27/24 13:31, Donald Buczek wrote:
> On 3/27/24 12:07, Jeff Layton wrote:
>> On Tue, 2024-03-26 at 18:59 -0700, Dai Ngo wrote:
>>> On 3/26/24 9:42 AM, Chuck Lever wrote:
>>>> On 3/26/24 11:04 AM, Donald Buczek wrote:
>>>>> Hi,
>>>>>
>>>>> we just got this on a nfs file server on 6.6.12 :
>>>>>
>>>>> [2719554.674554] receive_cb_reply: Got unrecognized reply: calldir
>>>>> 0x1 xpt_bc_xprt 00000000432042d3 xid c369f54d
>>>>> [2719555.391416] receive_cb_reply: Got unrecognized reply: calldir
>>>>> 0x1 xpt_bc_xprt 0000000017cc0507 xid d6018727
>>>>> [2719555.742118] receive_cb_reply: Got unrecognized reply: calldir
>>>>> 0x1 xpt_bc_xprt 000000008f2509ff xid 83d0248e
>>>>> [2719555.742566] receive_cb_reply: Got unrecognized reply: calldir
>>>>> 0x1 xpt_bc_xprt 00000000637a135a xid 7064546d
>>>>> [2719555.742803] receive_cb_reply: Got unrecognized reply: calldir
>>>>> 0x1 xpt_bc_xprt 0000000044ea3c51 xid a184bbe5
>>>>> [2719555.742836] receive_cb_reply: Got unrecognized reply: calldir
>>>>> 0x1 xpt_bc_xprt 00000000b6992e65 xid ed3fe82e
>>>>> [2719555.785358] receive_cb_reply: Got unrecognized reply: calldir
>>>>> 0x1 xpt_bc_xprt 0000000044ea3c51 xid a384bbe5
>>>>> [2719588.733414] receive_cb_reply: Got unrecognized reply: calldir
>>>>> 0x1 xpt_bc_xprt 000000008f2509ff xid 89d0248e
>>>>> [2719592.067221] receive_cb_reply: Got unrecognized reply: calldir
>>>>> 0x1 xpt_bc_xprt 00000000b6992e65 xid f33fe82e
>>>>> [2719807.431344] receive_cb_reply: Got unrecognized reply: calldir
>>>>> 0x1 xpt_bc_xprt 00000000fd87f88f xid 28b51379
>>>>> [2719838.510792] receive_cb_reply: Got unrecognized reply: calldir
>>>>> 0x1 xpt_bc_xprt 00000000432042d3 xid fa69f54d
>>>>> [2719852.493779] receive_cb_reply: Got unrecognized reply: calldir
>>>>> 0x1 xpt_bc_xprt 00000000ac1e99fe xid a16378bb
>>>>> [2719852.494853] receive_cb_reply: Got unrecognized reply: calldir
>>>>> 0x1 xpt_bc_xprt 0000000017cc0507 xid 0f028727
>>>>> [2719852.515457] receive_cb_reply: Got unrecognized reply: calldir
>>>>> 0x1 xpt_bc_xprt 0000000017cc0507 xid 10028727
>>>> These clients are sending NFSv4 callback replies that the server does
>>>> not have a waiting XID for. It's a sign of a significant communication
>>>> mix-up between the server and client.
>>>>
>>>> It would help us to get some details about your clients, the NFS
>>>> version in use, and how long you've been using this kernel. Also, a
>>>> raw packet capture might shed a little more light on the issue.
I believe this might be the same issue we're experiencing and was also
discussed on the linux-nfs mailing list:
https://lore.kernel.org/linux-nfs/10d43fc9-fe74-451d-9bd6-51f9f2de837b@esat.kuleuven.be/T/#t
> This specific file server has been running 6.6 for about a month. It has been running 5.15 for over a year before.
> All nfs clients are on 5.15 or 6.6.
>
> Sorry for not providing enough information. The problem had strong user impact so we needed to resolve the situation quickly by rebooting the server to a 5.15 kernel. This in fact unblocked the hanging mounts on a client.
>
> A user later reported, that he might have overloaded the file server from parallel writing jobs.
Looking at our traffic statistics, this is also the case in situation.
When we experienced the issues, the server was processing a lot more
concurrent writes than read operations. But that situation was already
present for hours (and sometimes days) before we triggered the issue. In
our case the high write load was mostly caused by HPC jobs rewriting the
same checkpoint files over and over.
We also noticed that once the situation happened, clients could no
longer mount the server after a reboot. Looking at recent messages in
this list, this could be fixed by the patch discussed in
https://lore.kernel.org/linux-nfs/171156001280.1469.15703028652039429964.stgit@klimt.1015granger.net/T/#u
?
Regards,
Rik
>
>>> This warning has has no effect on the server operation and was remove.
>>> See commit 05a4b58301c3.
> Ok.
>
>> Yes. It usually just means the job is already scheduled or is running,
>> which is harmless. That said, that can be indicative of the workqueue
>> job being stuck.
>>
>> Typically, backchannel jobs should run quickly, but lease breaks can
>> come in quick succession too, so this warning never meant much.
> Before we rebooted, I was able to run a script which takes some system data, including the stack traces of all tasks.
>
> http://owww.molgen.mpg.de/~buczek/2024-03-26_sauterelles
>
> Is the blocker
>
> 1 D root 11 2 0 80 0 - 0 rpc_sh Feb23 ? 00:00:18 \_ [kworker/u32:0+nfsd4_callbacks]
>
> ?
>
> # cat /proc/11/task/11/stack
>
> [<0>] rpc_shutdown_client+0xff/0x160 [sunrpc]
> [<0>] nfsd4_process_cb_update+0x4c/0x280 [nfsd]
> [<0>] nfsd4_run_cb_work+0xa3/0x160 [nfsd]
> [<0>] process_one_work+0x13f/0x300
> [<0>] worker_thread+0x2f5/0x410
> [<0>] kthread+0xe5/0x120
> [<0>] ret_from_fork+0x31/0x50
> [<0>] ret_from_fork_asm+0x1b/0x30
>
> rpc_shutdown_client+0xff is behind 'call schedule_timeout' in the expansion of `wait_event_timeout(destroy_wait, list_empty(&clnt->cl_tasks), 1*HZ);`.
>
> So it is waiting for the second to pass, possibly in a loop waiting for list_empty(&clnt->cl_tasks).
>
> I don't know if any guesses could be made out of this, though.
>
> Thanks
>
> Donald
>
>>>>> [2719917.753429] ------------[ cut here ]------------
>>>>> [2719917.758951] WARNING: CPU: 1 PID: 1448 at
>>>>> fs/nfsd/nfs4state.c:4939 nfsd_break_deleg_cb+0x115/0x190 [nfsd]
>>>>> [2719917.769208] Modules linked in: af_packet xt_nat xt_tcpudp
>>>>> iptable_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4
>>>>> rpcsec_gss_krb5 nfsv4 nfs i915 iosf_mbi drm_buddy drm_display_helper
>>>>> ttm intel_gtt video 8021q garp stp mrp llc input_leds
>>>>> x86_pkg_temp_thermal led_class hid_generic usbhid coretemp kvm_intel
>>>>> kvm irqbypass tg3 libphy smartpqi mgag200 i2c_algo_bit efi_pstore
>>>>> iTCO_wdt i40e crc32c_intel wmi_bmof pstore iTCO_vendor_support wmi
>>>>> ipmi_si nfsd auth_rpcgss oid_registry nfs_acl lockd grace sunrpc
>>>>> efivarfs ip_tables x_tables ipv6 autofs4
>>>>> [2719917.818740] CPU: 1 PID: 1448 Comm: nfsd Not tainted
>>>>> 6.6.12.mx64.461 #1
>>>>> [2719917.825777] Hardware name: Dell Inc. PowerEdge T440/021KCD, BIOS
>>>>> 2.12.2 07/09/2021
>>>>> [2719917.833781] RIP: 0010:nfsd_break_deleg_cb+0x115/0x190 [nfsd]
>>>>> [2719917.839911] Code: 00 00 00 e8 3d ae e8 e0 e9 5f ff ff ff 48 89
>>>>> df be 01 00 00 00 e8 8b 1f 3d e1 48 8d bb 98 00 00 00 e8 ef 10 01 00
>>>>> 84 c0 75 8a <0f> 0b eb 86 65 8b 05 0c 66 e0 5f 89 c0 48 0f a3 05 d6
>>>>> 1a 75 e2 0f
>>>>> [2719917.859303] RSP: 0018:ffffc9000bae7b70 EFLAGS: 00010246
>>>>> [2719917.864962] RAX: 0000000000000000 RBX: ffff8881e2fd6000 RCX:
>>>>> 0000000000000024
>>>>> [2719917.872520] RDX: ffff8881e2fd60c8 RSI: ffff889086d5de00 RDI:
>>>>> 0000000000000200
>>>>> [2719917.880050] RBP: ffff889301aa812c R08: 0000000000033580 R09:
>>>>> 0000000000000000
>>>>> [2719917.887575] R10: ffff889ef63b20d8 R11: 0000000000000000 R12:
>>>>> ffff888104cfb290
>>>>> [2719917.895095] R13: ffff889301aa8118 R14: ffff88989c8ace00 R15:
>>>>> ffff888104cfb290
>>>>> [2719917.902625] FS: 0000000000000000(0000)
>>>>> GS:ffff88a03fc00000(0000) knlGS:0000000000000000
>>>>> [2719917.911094] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
>>>>> [2719917.917236] CR2: 00007fb8a1cfc418 CR3: 000000000262c006 CR4:
>>>>> 00000000007706e0
>>>>> [2719917.924760] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
>>>>> 0000000000000000
>>>>> [2719917.932285] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7:
>>>>> 0000000000000400
>>>>> [2719917.939833] PKRU: 55555554
>>>>> [2719917.942971] Call Trace:
>>>>> [2719917.945834] <TASK>
>>>>> [2719917.948344] ? __warn+0x81/0x140
>>>>> [2719917.951983] ? nfsd_break_deleg_cb+0x115/0x190 [nfsd]
>>>>> [2719917.957470] ? report_bug+0x171/0x1a0
>>>>> [2719917.961562] ? handle_bug+0x3c/0x70
>>>>> [2719917.965459] ? exc_invalid_op+0x17/0x70
>>>>> [2719917.969715] ? asm_exc_invalid_op+0x1a/0x20
>>>>> [2719917.974317] ? nfsd_break_deleg_cb+0x115/0x190 [nfsd]
>>>>> [2719917.979820] __break_lease+0x24b/0x7c0
>>>>> [2719917.983991] ? __pfx_nfsd_acceptable+0x10/0x10 [nfsd]
>>>>> [2719917.989495] nfs4_get_vfs_file+0x195/0x380 [nfsd]
>>>>> [2719917.994740] ? prepare_creds+0x14c/0x240
>>>>> [2719917.999164] nfsd4_process_open2+0x3ed/0x16b0 [nfsd]
>>>>> [2719918.004570] ? nfsd_permission+0x4e/0x100 [nfsd]
>>>>> [2719918.009618] ? fh_verify+0x17b/0x8a0 [nfsd]
>>>>> [2719918.014243] nfsd4_open+0x6ae/0xcd0 [nfsd]
>>>>> [2719918.018777] ? nfsd4_encode_operation+0xa6/0x290 [nfsd]
>>>>> [2719918.024524] nfsd4_proc_compound+0x2f2/0x6a0 [nfsd]
>>>>> [2719918.029922] nfsd_dispatch+0xee/0x220 [nfsd]
>>>>> [2719918.034619] ? __pfx_nfsd+0x10/0x10 [nfsd]
>>>>> [2719918.039144] svc_process_common+0x307/0x730 [sunrpc]
>>>>> [2719918.044551] ? __pfx_nfsd_dispatch+0x10/0x10 [nfsd]
>>>>> [2719918.049883] ? __pfx_nfsd+0x10/0x10 [nfsd]
>>>>> [2719918.054404] svc_process+0x131/0x180 [sunrpc]
>>>>> [2719918.059171] nfsd+0x84/0xd0 [nfsd]
>>>>> [2719918.063012] kthread+0xe5/0x120
>>>>> [2719918.066539] ? __pfx_kthread+0x10/0x10
>>>>> [2719918.070664] ret_from_fork+0x31/0x50
>>>>> [2719918.074611] ? __pfx_kthread+0x10/0x10
>>>>> [2719918.078735] ret_from_fork_asm+0x1b/0x30
>>>>> [2719918.083018] </TASK>
>>>>> [2719918.085563] ---[ end trace 0000000000000000 ]---
>>>>>
>>>>> nfsd_break_deleg_cb+0x115 is the
>>>>> `WARN_ON_ONCE(!nfsd4_run_cb(&dp->dl_recall))` in
>>>>> nfsd_break_one_deleg() in our compilation
>>>>>
>>>>> I think that means, that the callback is already scheduled?
>>>>>
>>>>> One nfs client hung trying to mount something from that server.
>>>>>
>>>>> Best
>>>>>
>>>>> Donald
>>>>>
--
Rik Theys
System Engineer
KU Leuven - Dept. Elektrotechniek (ESAT)
Kasteelpark Arenberg 10 bus 2440 - B-3001 Leuven-Heverlee
+32(0)16/32.11.07
----------------------------------------------------------------
<<Any errors in spelling, tact or fact are transmission errors>>
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Thread overview: 6+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2024-03-26 15:04 WARN_ONCE from nfsd_break_one_deleg Donald Buczek
2024-03-26 16:42 ` Chuck Lever
2024-03-27 1:59 ` Dai Ngo
2024-03-27 11:07 ` Jeff Layton
2024-03-27 12:31 ` Donald Buczek
2024-03-27 20:09 ` Rik Theys
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