Bug#697066: [Joachim Ott: Re: BUG: scheduling while atomic: swapper/0/0x00000800]

Hello Jonathan,

I can reproduce a crash quite easily, but I don't get the messages anymore. One way is the copy with mc like above, last time the screen just froze. During the last hour I've been trying to create a dvd with qdvdauthor, with or without swap attached, and the screen just turns black. kern.log just says:

Jan 1 21:18:42 ott kernel: [   31.508020] Clocksource tsc unstable (delta = -238145710 ns)
Jan 1 21:18:46 ott kernel: [   35.936026] eth0: no IPv6 routers present
Jan 1 21:18:48 ott kernel: [   37.921794] CPU0 attaching NULL sched-domain.
Jan 1 21:18:48 ott kernel: [   37.921803] CPU1 attaching NULL sched-domain.
Jan 1 21:18:48 ott kernel: [   37.952089] CPU0 attaching sched-domain:
Jan 1 21:18:48 ott kernel: [   37.952094] domain 0: span 0-1 level MC
Jan 1 21:18:48 ott kernel: [   37.952096]   groups: group ffff88000180fbf0 cpus 0 group ffff88000188fbf0 cpus 1
Jan 1 21:18:48 ott kernel: [   37.952104] CPU1 attaching sched-domain:
Jan 1 21:18:48 ott kernel: [   37.952106] domain 0: span 0-1 level MC
Jan 1 21:18:48 ott kernel: [   37.952108]   groups: group ffff88000188fbf0 cpus 1 group ffff88000180fbf0 cpus 0
Jan 1 21:25:08 ott kernel: imklog 4.6.4, log source = /proc/kmsg started.
Jan 1 21:25:08 ott kernel: [    0.000000] Initializing cgroup subsys cpuset
Jan 1 21:25:08 ott kernel: [    0.000000] Initializing cgroup subsys cpu
Jan 1 21:25:08 ott kernel: [    0.000000] Linux version 2.6.32-5-amd64 (Debian 2.6.32-46) (dannf@debian.org) (gcc version 4.3.5 (Debian 4.3.5-4) ) #1 SMP Sun Sep 23 10:07:46 UTC 2012
Jan 1 21:25:08 ott kernel: [    0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-2.6.32-5-amd64 root=UUID=bdf42512-8527-49a3-96f2-08403f03b692 ro quiet
Jan 1 21:25:08 ott kernel: [    0.000000] KERNEL supported cpus:
Jan 1 21:25:08 ott kernel: [    0.000000]   Intel GenuineIntel

Around 21:24 the crash happens.

How can I track this down further?

Greetings from Berlin/Germany

2013/1/1 Jonathan Nieder <jrnieder@gmail.com>

reassign 697066 src:linux-2.6 2.6.32-46
# letting version tracking do its work
tags 697066 - squeeze
quit

Hi Joachim,

Joachim Ott wrote:

> I opened the file adt-bundle-linux-x86_64.zip on /media/sda2 (ext3 fs) with
> "mc", then I tried to copy the contained directory to
> another disk /media/sdb4 (ext4 fs), when the error notice appeared on the top
> right, asking if I'd like to file a bug report,
> While I still was looking round for the error reason, the screen went black,

[...]

> [ 1697.412002] BUG: scheduling while atomic: swapper/0/0x00000800

[...]
> [ 1697.412084] Call Trace:
> [ 1697.412093] [<ffffffff812fb328>] ? schedule+0xc5/0x7b4
> [ 1697.412099] [<ffffffff8105acb7>] ? get_next_timer_interrupt+0x1a8/0x223
> [ 1697.412104] [<ffffffff8101184e>] ? reschedule_interrupt+0xe/0x20
> [ 1697.412108] [<ffffffff81016872>] ? native_sched_clock+0x2e/0x78
> [ 1697.412112] [<ffffffff810168c1>] ? sched_clock+0x5/0x8
> [ 1697.412116] [<ffffffff81069397>] ? sched_clock_local+0x13/0x74
> [ 1697.412121] [<ffffffff8100fecd>] ? cpu_idle+0xd8/0xda
> [ 1697.412125] [<ffffffff8151c140>] ? early_idt_handler+0x0/0x71
> [ 1697.412129] [<ffffffff8151ccdd>] ? start_kernel+0x3dc/0x3e8
> [ 1697.412132] [<ffffffff8151c3b7>] ? x86_64_start_kernel+0xf9/0x106
> [ 1697.412823] NOHZ: local_softirq_pending 282

> [ 1697.416011] BUG: scheduling while atomic: swapper/0/0x00000800

Thanks for reporting it. Is this reproducible?

Curious,
Jonathan