Re: 2.4.20: Proccess stuck in __lock_page ...

[Marcelo Tosatti]

On Tue, 27 May 2003, Carl-Daniel Hailfinger wrote:

> Christian,
>
> this looks supiciously like the problem you are experiencing since
> 2.4.19-pre. Maybe we can fix this for good.
>
> Marcelo Tosatti wrote:
> >
> > On Mon, 26 May 2003, manish wrote:
> >
> >
> >>Hello !
> >>
> >>I am running the 2.4.20 kernel on a system with 3.5 GB RAM and dual CPU.
> >>I am running bonnie accross four drives in parallel:
> >>
> >>bonnie -s 1000 -d /<dir-name>
> >>
> >>bdflush settings on this system:
> >>
> >>[root@dyn-10-123-130-235 vm]# cat bdflush
> >>2       50      32      100     50      300     1       0       0
> >>
> >>All the bonnie process and any other process (like df, ps -ef etc.) are
> >>hung in __lock_page. Breaking into kdb, I observe the following for one
>
> Following is SysRq-T output for stuck processes during such a pause from
> Christian Klose. Only processes in D state are listed for brevity.
> Especially the last two call traces are interesting.

A "pause" is perfectly fine (to some extent, of course), now a hang is
not. Is this backtrace from a hanged, unusable kernel or ?