From: Chuck Ebbert <cebbert@redhat.com>
To: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Kernel Testers List <kernel-testers@vger.kernel.org>,
Maciej Rutecki <maciej.rutecki@gmail.com>,
"Ales Teska" <ales.teska@gmail.com>,
Alan Cox <alan@lxorguk.ukuu.org.uk>
Subject: Re: [Bug #16206] PROBLEM: PPP and other serial port related application hangs in kernel space
Date: Sun, 25 Jul 2010 15:36:19 -0400 [thread overview]
Message-ID: <20100725153619.54280d71@katamari> (raw)
In-Reply-To: <PRbv8sgxY6G.A.k7F.dVYSMB@chimera>
On Fri, 23 Jul 2010 14:15:51 +0200 (CEST)
"Rafael J. Wysocki" <rjw@sisk.pl> wrote:
> This message has been generated automatically as a part of a report
> of regressions introduced between 2.6.33 and 2.6.34.
>
> The following bug entry is on the current list of known regressions
> introduced between 2.6.33 and 2.6.34. Please verify if it still should
> be listed and let the tracking team know (either way).
>
>
> Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=16206
> Subject : PROBLEM: PPP and other serial port related application hangs in kernel space
> Submitter : Ales Teska <ales.teska@gmail.com>
> Date : 2010-06-09 20:46 (45 days old)
> Message-ID : <900E3B14-5B92-4A37-9581-049DB40F4D1C@gmail.com>
> References : http://marc.info/?l=linux-kernel&m=127611640301071&w=2
>
I think this is some kind of race in the ldisc handling code.
This patch went in 2.6.34:
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff_plain;h=638b9648ab51c9c549ff5735d3de519ef6199df3
"tty: Fix the ldisc hangup race"
Warning message from the original report:
Line 1278 is:
WARN_ON(!test_bit(TTY_LDISC, &tty->flags));
[ 1673.660876] ------------[ cut here ]------------
[ 1673.661471] WARNING: at drivers/char/tty_io.c:1278 tty_open+0x213/0x451()
[ 1673.689168] Pid: 1275, comm: ufoprobe_client Not tainted
2.6.34-486-exiprobes #1
[ 1673.690452] Call Trace:
[ 1673.690947] [<c10e93af>] ? tty_open+0x213/0x451
[ 1673.691926] [<c1018f51>] warn_slowpath_common+0x45/0x5c
[ 1673.693006] [<c1018f75>] warn_slowpath_null+0xd/0x10
[ 1673.694293] [<c10e93af>] tty_open+0x213/0x451
With softlockup detection enabled, there is also this trace:
[ 841.121579] INFO: task pppd:1390 blocked for more than 120 seconds.
[ 841.122613] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this
message.
[ 841.123578] pppd D cec53ea4 0 1390 1139 0x00000000
[ 841.151250] Call Trace:
[ 841.151815] [<c1037b30>] ? trace_hardirqs_on+0xb/0xd
[ 841.152755] [<c1198bf6>] ? _raw_spin_unlock_irqrestore+0x53/0x60
[ 841.153657] [<c10f7049>] ? spin_unlock_irqrestore+0x8/0xa
[ 841.154601] [<c10f79fb>] tty_ldisc_ref_wait+0x5d/0x75
[ 841.155265] [<c102b471>] ? autoremove_wake_function+0x0/0x33
[ 841.156456] [<d0c35211>] ? serial_ioctl+0x0/0x68 [usbserial]
[ 841.157913] [<c10f3c54>] tty_ioctl+0x6d1/0x731
I put the full traces into the bug report.
WARNING: multiple messages have this Message-ID (diff)
From: Chuck Ebbert <cebbert-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
To: "Rafael J. Wysocki" <rjw-KKrjLPT3xs0@public.gmane.org>
Cc: Linux Kernel Mailing List
<linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
Kernel Testers List
<kernel-testers-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
Maciej Rutecki
<maciej.rutecki-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
Ales Teska <ales.teska-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
Alan Cox <alan-qBU/x9rampVanCEyBjwyrvXRex20P6io@public.gmane.org>
Subject: Re: [Bug #16206] PROBLEM: PPP and other serial port related application hangs in kernel space
Date: Sun, 25 Jul 2010 15:36:19 -0400 [thread overview]
Message-ID: <20100725153619.54280d71@katamari> (raw)
In-Reply-To: <PRbv8sgxY6G.A.k7F.dVYSMB@chimera>
On Fri, 23 Jul 2010 14:15:51 +0200 (CEST)
"Rafael J. Wysocki" <rjw-KKrjLPT3xs0@public.gmane.org> wrote:
> This message has been generated automatically as a part of a report
> of regressions introduced between 2.6.33 and 2.6.34.
>
> The following bug entry is on the current list of known regressions
> introduced between 2.6.33 and 2.6.34. Please verify if it still should
> be listed and let the tracking team know (either way).
>
>
> Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=16206
> Subject : PROBLEM: PPP and other serial port related application hangs in kernel space
> Submitter : Ales Teska <ales.teska-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
> Date : 2010-06-09 20:46 (45 days old)
> Message-ID : <900E3B14-5B92-4A37-9581-049DB40F4D1C-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
> References : http://marc.info/?l=linux-kernel&m=127611640301071&w=2
>
I think this is some kind of race in the ldisc handling code.
This patch went in 2.6.34:
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff_plain;h=638b9648ab51c9c549ff5735d3de519ef6199df3
"tty: Fix the ldisc hangup race"
Warning message from the original report:
Line 1278 is:
WARN_ON(!test_bit(TTY_LDISC, &tty->flags));
[ 1673.660876] ------------[ cut here ]------------
[ 1673.661471] WARNING: at drivers/char/tty_io.c:1278 tty_open+0x213/0x451()
[ 1673.689168] Pid: 1275, comm: ufoprobe_client Not tainted
2.6.34-486-exiprobes #1
[ 1673.690452] Call Trace:
[ 1673.690947] [<c10e93af>] ? tty_open+0x213/0x451
[ 1673.691926] [<c1018f51>] warn_slowpath_common+0x45/0x5c
[ 1673.693006] [<c1018f75>] warn_slowpath_null+0xd/0x10
[ 1673.694293] [<c10e93af>] tty_open+0x213/0x451
With softlockup detection enabled, there is also this trace:
[ 841.121579] INFO: task pppd:1390 blocked for more than 120 seconds.
[ 841.122613] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this
message.
[ 841.123578] pppd D cec53ea4 0 1390 1139 0x00000000
[ 841.151250] Call Trace:
[ 841.151815] [<c1037b30>] ? trace_hardirqs_on+0xb/0xd
[ 841.152755] [<c1198bf6>] ? _raw_spin_unlock_irqrestore+0x53/0x60
[ 841.153657] [<c10f7049>] ? spin_unlock_irqrestore+0x8/0xa
[ 841.154601] [<c10f79fb>] tty_ldisc_ref_wait+0x5d/0x75
[ 841.155265] [<c102b471>] ? autoremove_wake_function+0x0/0x33
[ 841.156456] [<d0c35211>] ? serial_ioctl+0x0/0x68 [usbserial]
[ 841.157913] [<c10f3c54>] tty_ioctl+0x6d1/0x731
I put the full traces into the bug report.
next prev parent reply other threads:[~2010-07-25 19:42 UTC|newest]
Thread overview: 82+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-07-23 12:11 2.6.35-rc6: Reported regressions 2.6.33 -> 2.6.34 Rafael J. Wysocki
2010-07-23 12:11 ` Rafael J. Wysocki
2010-07-23 12:11 ` [Bug #15664] Graphics hang and kernel backtrace when starting Azureus with Compiz enabled Rafael J. Wysocki
2010-07-23 12:11 ` Rafael J. Wysocki
2010-07-23 12:15 ` [Bug #15977] WARNING: at lib/dma-debug.c:866 check_for_stack Rafael J. Wysocki
2010-07-30 6:58 ` FUJITA Tomonori
2010-07-30 6:58 ` FUJITA Tomonori
2010-07-23 12:15 ` [Bug #15912] Audio/video sync and crackling issues with snd-hda-intel (AD1981 codec) Rafael J. Wysocki
2010-07-23 12:15 ` Rafael J. Wysocki
2010-07-23 12:15 ` [Bug #15862] 2.6.34-rc4/5: iwlagn unusable until reload Rafael J. Wysocki
2010-07-23 12:15 ` Rafael J. Wysocki
2010-07-23 12:15 ` [Bug #15673] 2.6.34-rc2: "ima_dec_counts: open/free imbalance"? Rafael J. Wysocki
2010-07-23 15:12 ` Thomas Meyer
2010-07-23 15:12 ` Thomas Meyer
2010-07-23 19:50 ` Rafael J. Wysocki
2010-07-23 19:50 ` Rafael J. Wysocki
2010-07-23 12:15 ` [Bug #15704] [r8169] WARNING: at net/sched/sch_generic.c Rafael J. Wysocki
2010-07-26 13:16 ` Sergey Senozhatsky
2010-07-26 13:16 ` Sergey Senozhatsky
2010-07-26 14:34 ` Eric Dumazet
2010-07-26 14:57 ` Sergey Senozhatsky
2010-07-26 14:57 ` Sergey Senozhatsky
2010-07-26 15:20 ` Eric Dumazet
2010-07-26 15:20 ` Eric Dumazet
2010-07-26 15:50 ` Sergey Senozhatsky
2010-07-26 15:50 ` Sergey Senozhatsky
2010-07-23 12:15 ` [Bug #16035] Incorrect initial resolution of (external) vga monitor with KMS Rafael J. Wysocki
2010-07-23 12:15 ` Rafael J. Wysocki
2010-07-23 12:15 ` [Bug #16007] x86/pci Oops with CONFIG_SND_HDA_INTEL Rafael J. Wysocki
2010-07-23 12:15 ` Rafael J. Wysocki
2010-07-23 14:20 ` Bjorn Helgaas
2010-07-23 19:51 ` Rafael J. Wysocki
2010-07-23 12:15 ` [Bug #16097] 2.6.34 on Samsung P460: reset after "Waiting for /dev to be fully populated" Rafael J. Wysocki
2010-07-23 12:15 ` [Bug #16082] host panic on kernel 2.6.34 Rafael J. Wysocki
2010-07-23 12:15 ` Rafael J. Wysocki
2010-07-23 12:15 ` [Bug #16170] Leadtek Winfast DTV Dongle (STK7700P based) is not working in 2.6.34 Rafael J. Wysocki
2010-07-23 12:15 ` Rafael J. Wysocki
2010-07-23 12:15 ` [Bug #16111] hostap_pci: infinite registered netdevice wifi0 Rafael J. Wysocki
2010-07-23 13:13 ` Tim Gardner
2010-07-23 13:13 ` Tim Gardner
2010-07-23 19:53 ` Rafael J. Wysocki
2010-07-23 19:53 ` Rafael J. Wysocki
2010-07-23 12:15 ` [Bug #16139] wait_even_interruptible_timeout(), signal, spin_lock() = system hang Rafael J. Wysocki
2010-07-23 12:15 ` [Bug #16206] PROBLEM: PPP and other serial port related application hangs in kernel space Rafael J. Wysocki
2010-07-25 19:36 ` Chuck Ebbert [this message]
2010-07-25 19:36 ` Chuck Ebbert
2010-07-23 12:15 ` [Bug #16137] Ooops in BTRFS in 2.6.34 / x86_64 when mounting subvolume by name Rafael J. Wysocki
2010-07-23 12:15 ` [Bug #16207] Suspend and VT switch hangs since 2.6.34 Rafael J. Wysocki
2010-07-23 17:33 ` Jesse Barnes
2010-07-23 17:33 ` Jesse Barnes
2010-07-23 17:50 ` Tino Keitel
2010-07-23 17:50 ` Tino Keitel
2010-07-23 17:57 ` Jesse Barnes
2010-07-23 17:57 ` Jesse Barnes
2010-07-23 12:15 ` [Bug #16233] Fwd: [2.6.34] INFO: task rsync:20019 blocked for more than 120 seconds Rafael J. Wysocki
2010-07-23 12:15 ` Rafael J. Wysocki
2010-07-23 12:15 ` [Bug #16270] Image is a hit-or-a-miss. Often displayed green+purple Rafael J. Wysocki
2010-07-23 12:15 ` Rafael J. Wysocki
2010-07-23 12:15 ` [Bug #16300] [2.6.34 regression] mplayer gets out of sync due to problems with ALSA Rafael J. Wysocki
2010-07-23 12:15 ` [Bug #16320] iwl3945 crashes, seems to be disconnecting from the PCI bus Rafael J. Wysocki
2010-07-23 12:15 ` Rafael J. Wysocki
2010-07-23 12:15 ` [Bug #16348] kswapd continuously active when doing IO Rafael J. Wysocki
2010-07-23 12:15 ` Rafael J. Wysocki
2010-07-23 13:45 ` Dave Chinner
2010-07-23 19:55 ` Rafael J. Wysocki
2010-07-23 19:55 ` Rafael J. Wysocki
2010-07-23 12:15 ` [Bug #16361] KMS not working on Radeon Mobility 3430 Rafael J. Wysocki
2010-07-23 12:15 ` Rafael J. Wysocki
2010-07-23 12:15 ` [Bug #16371] Regression 2.6.33->2.6.34: OOPS at boot, kmalloc corruption? Rafael J. Wysocki
2010-07-23 12:15 ` Rafael J. Wysocki
2010-07-23 12:15 ` [Bug #16357] acpi-cpufreq fails to load (No such device) if CONFIG_SMP=n Rafael J. Wysocki
2010-07-23 12:15 ` [Bug #16388] i915 drm BUG: unable to handle kernel paging request at a5e89046 Rafael J. Wysocki
2010-07-23 12:15 ` Rafael J. Wysocki
2010-07-23 17:37 ` Jesse Barnes
2010-07-23 17:37 ` Jesse Barnes
2010-07-23 12:15 ` [Bug #16377] X.org crash while running a OpenGL composited KDE 4.4.4 session with Radeon KMS Rafael J. Wysocki
2010-07-23 12:15 ` [Bug #16376] random - possibly Radeon DRM KMS related - freezes Rafael J. Wysocki
-- strict thread matches above, loose matches on Subject: below --
2010-08-01 14:27 2.6.35-rc6-git6: Reported regressions 2.6.33 -> 2.6.34 Rafael J. Wysocki
2010-08-01 14:44 ` [Bug #16206] PROBLEM: PPP and other serial port related application hangs in kernel space Rafael J. Wysocki
2010-07-10 0:24 2.6.35-rc4-git4: Reported regressions 2.6.33 -> 2.6.34 Rafael J. Wysocki
2010-07-10 0:33 ` [Bug #16206] PROBLEM: PPP and other serial port related application hangs in kernel space Rafael J. Wysocki
2010-07-10 0:33 ` Rafael J. Wysocki
2010-06-20 22:32 2.6.35-rc3: Reported regressions 2.6.33 -> 2.6.34 Rafael J. Wysocki
2010-06-20 22:34 ` [Bug #16206] PROBLEM: PPP and other serial port related application hangs in kernel space Rafael J. Wysocki
2010-06-20 22:34 ` Rafael J. Wysocki
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