Re: [BUG]: Hard lockups continue with linux-2.6.15-rc1-rc7

[Pekka Enberg <penberg@cs.helsinki.fi>]

Hi Tarkan,

On 12/26/05, Tarkan Erimer <tarkane@gmail.com> wrote:
> I'm having hard lockups with all the RCs of linux-2.6.15. I,
> previously, mentioned this with the subject "[BUG]: Software compiling
> occasionlly hangs under 2.6.15-rc1/rc2 and 2.6.15-rc1-mm2" in the
> list. I investigated a bit at found these interesting things.
>
> -- Always reproducable. To reproduce:
>     - in console 1, issueing "updatedb"
>     - in console 2, issueing "find / -name "blahblah" -print
>     - in console 3, issueing "emerge -uDp world" (BTW, I'm using Gentoo.)
>     - in console 4, X started.
>     - a few minutes later, system completely freezes. No Alt+SysRq+t
> works. (Normally, it does)
>
> When the system freezes, there is nothing in logs. But hardly, I
> captured an  Alt+SysRq+t. A few seconds (15-20 seconds) before hang. I
> attached this  Alt+SysRq+t and lsmod output. Hope this helps to solve
> this.

You can use git bisect to narrow down the changeset that introduced
the bug. Please refer to the following URL for details:
http://www.kernel.org/pub/software/scm/git/docs/howto/isolate-bugs-with-bisect.txt

                        Pekka