From: "Rainer Kloud" <rainer.kloud@abwesend.de>
To: cip-dev@lists.cip-project.org
Subject: Re: [cip-dev] BUG: using smp_processor_id() in preemptible [00000000] code: TCPTSK/1809
Date: Mon, 7 Jun 2021 07:23:38 +0200 [thread overview]
Message-ID: <trinity-17b11b5f-9805-4527-89fb-1f3a0103a164-1623043418611@3c-app-gmx-bap15> (raw)
In-Reply-To: <20210606191433.GA18130@amd>
[-- Attachment #1: Type: text/plain, Size: 3199 bytes --]
Hello Pavel,
> I notice you are using -rt kernel. Do you actually need realtime
> features?
Yes, I actually need the realtime feature. I have one task which
needs to run periodically in realtime (triggered every 10ms by an
external IRQ).
> Can you try to reproduce the problem on 4.19.193?
This is only a problem with the realtime patch. The patch
introduces migrate_enable which is part of the callstack:
Jun 1 09:11:46 sicam kernel: [46802.944165] BUG: using smp_processor_id() in preemptible [00000000] code: TCPTSK/1809
Jun 1 09:11:46 sicam kernel: [46802.944210] caller is migrate_enable+0x40/0x488
Jun 1 09:11:46 sicam kernel: [46802.944221] CPU: 0 PID: 1809 Comm: TI4SDTSK#135 Tainted: G W 4.19.165-cip41-rt18 #1
Jun 1 09:11:46 sicam kernel: [46802.944225] Hardware name: Altera SOCFPGA
Jun 1 09:11:46 sicam kernel: [46802.944252] [<c010e9d4>] (unwind_backtrace) from [<c010b9f4>] (show_stack+0x10/0x14)
Jun 1 09:11:46 sicam kernel: [46802.944272] [<c010b9f4>] (show_stack) from [<c062f854>] (dump_stack+0x94/0xa8)
Jun 1 09:11:46 sicam kernel: [46802.944299] [<c062f854>] (dump_stack) from [<c03a57ec>] (check_preemption_disabled+0x110/0x114)
Jun 1 09:11:46 sicam kernel: [46802.944316] [<c03a57ec>] (check_preemption_disabled) from [<c014163c>] (migrate_enable+0x40/0x488)
Jun 1 09:11:46 sicam kernel: [46802.944338] [<c014163c>] (migrate_enable) from [<c053ff0c>] (ip_finish_output2+0x21c/0x460)
Jun 1 09:11:46 sicam kernel: [46802.944353] [<c053ff0c>] (ip_finish_output2) from [<c0542854>] (ip_output+0x140/0x184)
Jun 1 09:11:46 sicam kernel: [46802.944364] [<c0542854>] (ip_output) from [<c0542128>] (__ip_queue_xmit+0x134/0x40c)
Jun 1 09:11:46 sicam kernel: [46802.944381] [<c0542128>] (__ip_queue_xmit) from [<c055cf70>] (__tcp_transmit_skb+0x53c/0xb20)
Jun 1 09:11:46 sicam kernel: [46802.944392] [<c055cf70>] (__tcp_transmit_skb) from [<c055e188>] (tcp_write_xmit+0x27c/0xfd0)
Jun 1 09:11:46 sicam kernel: [46802.944403] [<c055e188>] (tcp_write_xmit) from [<c055ef10>] (__tcp_push_pending_frames+0x34/0xa8)
Jun 1 09:11:46 sicam kernel: [46802.944413] [<c055ef10>] (__tcp_push_pending_frames) from [<c054f5cc>] (tcp_sendmsg_locked+0x66c/0xc40)
Jun 1 09:11:46 sicam kernel: [46802.944422] [<c054f5cc>] (tcp_sendmsg_locked) from [<c054fbc8>] (tcp_sendmsg+0x28/0x3c)
Jun 1 09:11:46 sicam kernel: [46802.944441] [<c054fbc8>] (tcp_sendmsg) from [<c04cb3f4>] (sock_sendmsg+0x14/0x24)
Jun 1 09:11:46 sicam kernel: [46802.944455] [<c04cb3f4>] (sock_sendmsg) from [<c04cc6d0>] (__sys_sendto+0xc4/0x104)
Jun 1 09:11:46 sicam kernel: [46802.944467] [<c04cc6d0>] (__sys_sendto) from [<c04cc72c>] (sys_send+0x18/0x20)
Jun 1 09:11:46 sicam kernel: [46802.944479] [<c04cc72c>] (sys_send) from [<c0101000>] (ret_fast_syscall+0x0/0x5c)
Jun 1 09:11:46 sicam kernel: [46802.944484] Exception stack(0xda337fa8 to 0xda337ff0)
Jun 1 09:11:46 sicam kernel: [46802.944493] 7fa0: 001c6f2c 00000001 00000037 0020ae40 00000006 00000000
Jun 1 09:11:46 sicam kernel: [46802.944502] 7fc0: 001c6f2c 00000001 00000001 00000121 001651c8 001ea378 ffff0000 00000006
Jun 1 09:11:46 sicam kernel: [46802.944508] 7fe0: 00000000 b3efea18 00000000 b6a2ff40
Best Regards,
Rainer
[-- Attachment #2: Type: text/plain, Size: 428 bytes --]
-=-=-=-=-=-=-=-=-=-=-=-
Links: You receive all messages sent to this group.
View/Reply Online (#6495): https://lists.cip-project.org/g/cip-dev/message/6495
Mute This Topic: https://lists.cip-project.org/mt/83330337/4520388
Group Owner: cip-dev+owner@lists.cip-project.org
Unsubscribe: https://lists.cip-project.org/g/cip-dev/leave/8129055/4520388/727948398/xyzzy [cip-dev@archiver.kernel.org]
-=-=-=-=-=-=-=-=-=-=-=-
next prev parent reply other threads:[~2021-06-07 5:23 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-05 13:50 [cip-dev] BUG: using smp_processor_id() in preemptible [00000000] code: TCPTSK/1809 Rainer Kloud
2021-06-06 19:14 ` Pavel Machek
2021-06-07 4:31 ` rainer.kloud
2021-06-07 5:23 ` Rainer Kloud [this message]
2021-06-07 8:25 ` Jan Kiszka
2021-06-07 10:18 ` Rainer Kloud
2021-06-10 5:33 ` Jan Kiszka
2021-06-11 22:34 ` Pavel Machek
2021-06-15 4:56 ` Rainer Kloud
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=trinity-17b11b5f-9805-4527-89fb-1f3a0103a164-1623043418611@3c-app-gmx-bap15 \
--to=rainer.kloud@abwesend.de \
--cc=cip-dev@lists.cip-project.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.