Hi,
Michal Piotrowski napisa?(a):
> On 04/05/07, Andrew Morton <[email protected]> wrote:
>> On Fri, 04 May 2007 18:20:51 +0200 Michal Piotrowski
>> <[email protected]> wrote:
>>
>> > I ran this script tree times,
>> >
>> > #! /bin/sh
>> >
>> > for i in `find /sys/ -type f`
>> > do
>> > echo "wy?wietlam $i"
>> > sudo cat $i > /dev/null
>> > done
>> >
>> > First run - scheduler bug
>> > Second run - NOHZ bug
>> > Third - VFS bug
>> >
>> > Hmmmm...
>> >
>> > [93298.252601] BUG: at /mnt/md0/devel/linux-git/kernel/sched.c:3241
>> add_preempt_count()
>> > [93298.260334] [<c0105039>] show_trace_log_lvl+0x1a/0x2f
>> > [93298.265507] [<c0105720>] show_trace+0x12/0x14
>> > [93298.269974] [<c01057d2>] dump_stack+0x16/0x18
>> > [93298.274434] [<c011d18a>] add_preempt_count+0x89/0x8b
>> > [93298.279501] [<c0126492>] irq_enter+0xd/0x2e
>> > [93298.283788] [<c0114c1e>] smp_apic_timer_interrupt+0x2a/0x84
>> > [93298.289458] [<c0104b2b>] apic_timer_interrupt+0x33/0x38
>> > [93298.294783] [<c0257b79>] show_uevent+0x58/0xcd
>> > [93298.299329] =======================
>> > [93390.468056] NOHZ: local_softirq_pending 22
>> > [93447.105850] NOHZ: local_softirq_pending 22
>> > [93450.332884] BUG: unable to handle kernel paging request at
>> virtual address 3e343c0c
>> > [93450.340626] printing eip:
>> > [93450.343333] c018e2bc
>> > [93450.345520] *pde = 00000000
>> > [93450.348314] Oops: 0000 [#1]
>>
>> Nice. What was the last file which it read before crashing?
>>
>> Are you able to consistently crash it by reading just that file?
>
> Random files, random bugs (usually it starts with a slab corruption).
>
> git-bisect will give an answer.
So this is a random bug generator...
git-bisect bad
16574dccd8f62dc1b585325f8a6a0aab10047ed8 is first bad commit
commit 16574dccd8f62dc1b585325f8a6a0aab10047ed8
Author: Kay Sievers <[email protected]>
Date: Fri Apr 6 01:40:38 2007 +0200
Driver core: make uevent-environment available in uevent-file
This allows sysfs to show the environment variables that are available
if the uevent happens. This lets userspace not have to cache all of
this information as the kernel already knows it.
Signed-off-by: Kay Sievers <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
:040000 040000 34152258985968083c04ab003ced54d73e92a790 c3301e8cd7705c293817c6747b3cc59d6cbf14bb M drivers
http://www.stardust.webpages.pl/files/tbf/bitis-gabonica/2.6.21-git4/git-config
Regards,
Michal
--
Michal K. K. Piotrowski
Kernel Monkeys
(http://kernel.wikidot.com/start)
On Sat, 2007-05-05 at 20:04 +0200, Michal Piotrowski wrote:
> Hi,
>
> Michal Piotrowski napisał(a):
> > On 04/05/07, Andrew Morton <[email protected]> wrote:
> >> On Fri, 04 May 2007 18:20:51 +0200 Michal Piotrowski
> >> <[email protected]> wrote:
> >>
> >> > I ran this script tree times,
> >> >
> >> > #! /bin/sh
> >> >
> >> > for i in `find /sys/ -type f`
> >> > do
> >> > echo "wyświetlam $i"
> >> > sudo cat $i > /dev/null
> >> > done
> >> >
> >> > First run - scheduler bug
> >> > Second run - NOHZ bug
> >> > Third - VFS bug
> >> >
> >> > Hmmmm...
> >> >
> >> > [93298.252601] BUG: at /mnt/md0/devel/linux-git/kernel/sched.c:3241
> >> add_preempt_count()
> >> > [93298.260334] [<c0105039>] show_trace_log_lvl+0x1a/0x2f
> >> > [93298.265507] [<c0105720>] show_trace+0x12/0x14
> >> > [93298.269974] [<c01057d2>] dump_stack+0x16/0x18
> >> > [93298.274434] [<c011d18a>] add_preempt_count+0x89/0x8b
> >> > [93298.279501] [<c0126492>] irq_enter+0xd/0x2e
> >> > [93298.283788] [<c0114c1e>] smp_apic_timer_interrupt+0x2a/0x84
> >> > [93298.289458] [<c0104b2b>] apic_timer_interrupt+0x33/0x38
> >> > [93298.294783] [<c0257b79>] show_uevent+0x58/0xcd
> >> > [93298.299329] =======================
> >> > [93390.468056] NOHZ: local_softirq_pending 22
> >> > [93447.105850] NOHZ: local_softirq_pending 22
> >> > [93450.332884] BUG: unable to handle kernel paging request at
> >> virtual address 3e343c0c
> >> > [93450.340626] printing eip:
> >> > [93450.343333] c018e2bc
> >> > [93450.345520] *pde = 00000000
> >> > [93450.348314] Oops: 0000 [#1]
> >>
> >> Nice. What was the last file which it read before crashing?
> >>
> >> Are you able to consistently crash it by reading just that file?
> >
> > Random files, random bugs (usually it starts with a slab corruption).
> >
> > git-bisect will give an answer.
>
> So this is a random bug generator...
>
> git-bisect bad
> 16574dccd8f62dc1b585325f8a6a0aab10047ed8 is first bad commit
> commit 16574dccd8f62dc1b585325f8a6a0aab10047ed8
> Author: Kay Sievers <[email protected]>
> Date: Fri Apr 6 01:40:38 2007 +0200
>
> Driver core: make uevent-environment available in uevent-file
>
> This allows sysfs to show the environment variables that are available
> if the uevent happens. This lets userspace not have to cache all of
> this information as the kernel already knows it.
>
> Signed-off-by: Kay Sievers <[email protected]>
> Signed-off-by: Greg Kroah-Hartman <[email protected]>
>
> :040000 040000 34152258985968083c04ab003ced54d73e92a790 c3301e8cd7705c293817c6747b3cc59d6cbf14bb M drivers
>
> http://www.stardust.webpages.pl/files/tbf/bitis-gabonica/2.6.21-git4/git-config
Greg fixed this:
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=c7308c81a8220ab68eebfadde37db881a2800064
Kay