Re: 2.4.20: Proccess stuck in __lock_page ...

[manish (manish@storadinc.com)]

Marcelo Tosatti wrote:

> On Tue, 27 May 2003, Marc-Christian Petersen wrote:
>
> > On Tuesday 27 May 2003 19:27, Marcelo Tosatti wrote:
> >
> > Hi Marcelo,
> >
> > > > 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 ?
> > A pause is _not_ perfectly fine, even not to some extent. That pause we are
> > discussing about is a pause of the _whole_ machine, not just disk i/o pauses.
> > Mouse stops, keyboard stops, everything stops, who knows wtf.
>
> Do you also notice them?
>
>
> > That behaviour is absolutely bullshit for desktop users. For serverusage you
> > may not notice it in this dimension (mostly no X so no mouse), but also for a
> > server environment this may be very bad.
>
> Agreed.
Hi Marc,

With respect to the hangs that you noticed, did the processes complete 
after a "pause" or did they stay hung (deadlocked)?

Thanks
Manish



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