From: Con Kolivas <kernel@kolivas.org>
To: Carl-Daniel Hailfinger <c-d.hailfinger.kernel.2003@gmx.net>
Subject: Re: 2.4.20: Proccess stuck in __lock_page ...
Date: Wed, 28 May 2003 23:33:43 +1000
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Cc: Jens Axboe <axboe@suse.de>,
       Marc-Christian Petersen <m.c.p@wolk-project.de>,
       Andrew Morton <akpm@digeo.com>, matthias.mueller@rz.uni-karlsruhe.de,
       manish@storadinc.com, andrea@suse.de, marcelo@conectiva.com.br,
       linux-kernel@vger.kernel.org
References: <3ED2DE86.2070406@storadinc.com> <200305282321.45405.kernel@kolivas.org> <3ED4BA09.9040108@gmx.net>
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On Wed, 28 May 2003 23:30, Carl-Daniel Hailfinger wrote:
> Con Kolivas wrote:
> > On Wed, 28 May 2003 23:08, Jens Axboe wrote:
> >>On Wed, May 28 2003, Carl-Daniel Hailfinger wrote:
> >>>Jens Axboe wrote:
> >>>>On Wed, May 28 2003, Marc-Christian Petersen wrote:
> >>>>>On Wednesday 28 May 2003 13:27, Andrew Morton wrote:
> >>>>>>Guys, you're the ones who can reproduce this.  Please spend more time
> >>>>>>working out which chunk (or combination thereof) actually fixes the
> >>>>>>problem.  If indeed any of them do.
> >>>>>
> >>>>>As I said, I will test it this evening. ATM I don't have time to
> >>>>>recompile and reboot. This evening I will test extensively, even on
> >>>>>SMP, SCSI, IDE and so on.
> >>>>
> >>>>May I ask how you are reproducing the bad results? I'm trying in vain
> >>>>here...
> >>>
> >>>Quoting Con Kolivas:
> >>>
> >>>dd if=/dev/zero of=dump bs=4096 count=512000
> >>
> >>already tried that, no go. on ide/scsi? what filesystem? how much ram?
> >>anything else running? smp/up?
> >
> > I'm using UP on IDE. I reproduce it easily on a P3 256Mb laptop with
> > 5400rpm drive, and less easily but still occurs on a P4 2.53 512Mb pc
> > with 2x7200rpm software raid 0 IDE drives. Even if the only thing you try
> > to do is move the mouse, the mouse will freeze for up to 30secs. When you
> > first start the write no disk activity happens for up to a few seconds,
> > then it will start writing madly and the machine will come to a
> > standstill for a variable length of time. Then it will come back to life
> > for a few seconds only to die again for a few seconds and so on till the
> > write is complete.
> >
> > Still testing combinations to see which is the best, but 1+2 seems better
> > than 3 alone as doing reads midstream in the write don't cause hangs. I
> > haven't seen zombie processes ever.
>
> Just curious - which compiler did you use?

For this latest testing gcc 3.2.2

The hangs predate this to a time when I was using 2.95.3 and getting the 
hangs.

Con
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