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Date: Sun, 11 May 2008 15:26:37 +0400
From: "Alexander Beregalov" <a.beregalov@...il.com>
To: "Adrian Bunk" <bunk@...nel.org>
Cc: kernel-testers@...r.kernel.org, mingo@...e.hu, rml@...h9.net,
linux-kernel@...r.kernel.org, phil.el@...adoo.fr,
oprofile-list@...ts.sf.net
Subject: Re: 2.6.26-rc1: WARNING: at kernel/sched.c:4388
2008/5/11 Adrian Bunk <bunk@...nel.org>:
> On Sun, May 11, 2008 at 01:32:22AM +0400, Alexander Beregalov wrote:
>> 2008/5/11 Adrian Bunk <bunk@...nel.org>:
>> > On Sat, May 10, 2008 at 01:45:55PM +0400, Alexander Beregalov wrote:
>> >> Hi
>> >>
>> >> Is it a scheduler or preempt issue?
>> >>
>> >> WARNING: at kernel/sched.c:4388 sub_preempt_count+0x57/0x60()
>> >> Modules linked in:
>> >> Pid: 9698, comm: rtorrent Not tainted 2.6.26-rc1-00279-g28a4acb #13
>> >> [<c011a00a>] warn_on_slowpath+0x41/0x6c
>> >> [<c02ec49f>] ? oprofile_add_sample+0x29/0x32
>> >> [<c02edc91>] ? athlon_check_ctrs+0x32/0x56
>> >> [<c02ed6fb>] ? profile_exceptions_notify+0x23/0x34
>> >
>> > My first guess would be an oprofile problem, but I could be completely
>> > wrong on this one.
>> >
>> > Is it reproducible?
>> It happened only at once.
>> I dont know what did cause it, so I will wait for the second occurrence.
>>...
>
> You already have enough material for sending a bug report, I asked my
> questions only for figuring out whether it's a regression and whether
> bisecting it might make sense.
>
> Send the email you sent here together with the output of dmesg and your
> .config to all email addresses you find under the SCHEDULER and OPROFILE
> entries in the MAINTAINERS file.
Ok, thanks.
WARNING: at kernel/sched.c:4388 sub_preempt_count+0x57/0x60()
Modules linked in:
Pid: 9698, comm: rtorrent Not tainted 2.6.26-rc1-00279-g28a4acb #13
[<c011a00a>] warn_on_slowpath+0x41/0x6c
[<c02ec49f>] ? oprofile_add_sample+0x29/0x32
[<c02edc91>] ? athlon_check_ctrs+0x32/0x56
[<c02ed6fb>] ? profile_exceptions_notify+0x23/0x34
[<c035a1b9>] ? notifier_call_chain+0x2b/0x4a
[<c0140dc6>] ? __rcu_read_unlock+0x51/0x5f
[<c035a204>] ? __atomic_notifier_call_chain+0x2c/0x36
[<c035a21a>] ? atomic_notifier_call_chain+0xc/0xe
[<c012cd1d>] ? notify_die+0x2d/0x2f
BUG: unable to handle kernel paging request at 8b0d7400
IP: [<c0103aad>] dump_trace+0x9a/0xd6
*pde = 00000000
Oops: 0000 [#1] PREEMPT DEBUG_PAGEALLOC
Modules linked in:
Pid: 9698, comm: rtorrent Not tainted (2.6.26-rc1-00279-g28a4acb #13)
EIP: 0060:[<c0103aad>] EFLAGS: 00210093 CPU: 0
EIP is at dump_trace+0x9a/0xd6
EAX: 8b0d7ffc EBX: 8b0d7400 ECX: 0000160c EDX: 00000000
ESI: 56d78957 EDI: f54d6024 EBP: f54d5ec0 ESP: f54d5ea4
DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 0068
Process rtorrent (pid: 9698, ti=f54d5000 task=f6270000 task.ti=f54d6000)
Stack: 8b0d7ffc c01039d4 8b0d7000 00001000 c0436c04 f54d5f1c c03e844d f54d5ed8
c0103afe f54d5f1c c0361978 c0436c04 00000003 f54d5ee8 c0104165 f54d5f1c
c0436c04 f54d5f1c c010451f f54d5f1c c03e2704 000025e2 f62702f0 c04b960c
Call Trace:
[<c01039d4>] ? print_trace_address+0x0/0x3f
[<c0103afe>] ? show_trace_log_lvl+0x15/0x28
[<c0104165>] ? show_trace+0x10/0x14
[<c010451f>] ? dump_stack+0x59/0x63
[<c011a00a>] ? warn_on_slowpath+0x41/0x6c
[<c02ec49f>] ? oprofile_add_sample+0x29/0x32
[<c02edc91>] ? athlon_check_ctrs+0x32/0x56
[<c02ed6fb>] ? profile_exceptions_notify+0x23/0x34
[<c035a1b9>] ? notifier_call_chain+0x2b/0x4a
[<c0140dc6>] ? __rcu_read_unlock+0x51/0x5f
[<c035a204>] ? __atomic_notifier_call_chain+0x2c/0x36
[<c035a21a>] ? atomic_notifier_call_chain+0xc/0xe
[<c012cd1d>] ? notify_die+0x2d/0x2f
BUG: unable to handle kernel paging request at 8b0d7400
IP: [<c0103aad>] dump_trace+0x9a/0xd6
*pde = 00000000
Oops: 0000 [#2] PREEMPT DEBUG_PAGEALLOC
Modules linked in:
Pid: 9698, comm: rtorrent Not tainted (2.6.26-rc1-00279-g28a4acb #13)
EIP: 0060:[<c0103aad>] EFLAGS: 00210093 CPU: 0
EIP is at dump_trace+0x9a/0xd6
EAX: 8b0d7ffc EBX: 8b0d7400 ECX: 0000160c EDX: 00000000
ESI: 56d78957 EDI: f54d5d90 EBP: f54d5d90 ESP: f54d5d74
DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 0068
Process rtorrent (pid: 9698, ti=f54d5000 task=f6270000 task.ti=f54d6000)
Stack: 8b0d7ffc c01039d4 8b0d7000 f54d5ea4 c03e230f 00000018 00000000 f54d5da8
c0103afe 00000000 c0361978 c03e230f f54d5f07 f54d5dd4 c0103b9e 00000000
c03e230f c03e238e c03e230f f54d5e6c f54d5ea4 00000000 f54d5e6c 0000002b
Call Trace:
[<c01039d4>] ? print_trace_address+0x0/0x3f
[<c0103afe>] ? show_trace_log_lvl+0x15/0x28
[<c0103b9e>] ? show_stack_log_lvl+0x8d/0x98
[<c0103c34>] ? show_registers+0x8b/0x1bc
[<c0358833>] ? __die+0x61/0xc6
[<c0358849>] ? __die+0x77/0xc6
[<c0103dec>] ? die+0x87/0x106
[<c035a011>] ? do_page_fault+0x4e3/0x59d
[<c0359b2e>] ? do_page_fault+0x0/0x59d
[<c0358632>] ? error_code+0x6a/0x70
[<c0103aad>] ? dump_trace+0x9a/0xd6
[<c01039d4>] ? print_trace_address+0x0/0x3f
[<c0103afe>] ? show_trace_log_lvl+0x15/0x28
[<c0104165>] ? show_trace+0x10/0x14
[<c010451f>] ? dump_stack+0x59/0x63
[<c011a00a>] ? warn_on_slowpath+0x41/0x6c
[<c02ec49f>] ? oprofile_add_sample+0x29/0x32
[<c02edc91>] ? athlon_check_ctrs+0x32/0x56
[<c02ed6fb>] ? profile_exceptions_notify+0x23/0x34
[<c035a1b9>] ? notifier_call_chain+0x2b/0x4a
[<c0140dc6>] ? __rcu_read_unlock+0x51/0x5f
[<c035a204>] ? __atomic_notifier_call_chain+0x2c/0x36
[<c035a21a>] ? atomic_notifier_call_chain+0xc/0xe
[<c012cd1d>] ? notify_die+0x2d/0x2f
BUG: unable to handle kernel paging request at 8b0d7400
IP: [<c0103aad>] dump_trace+0x9a/0xd6
*pde = 00000000
Recursive die() failure, output suppressed
Kernel panic - not syncing: Fatal exception in interrupt
Download attachment "tor-config" of type "application/octet-stream" (29699 bytes)
Download attachment "tor-dmesg" of type "application/octet-stream" (26397 bytes)
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