Re: 2.4.20: Proccess stuck in __lock_page ...
From: Jens Axboe (firstname.lastname@example.org)
Date: Wed May 28 2003 - 09:37:14 EST
On Wed, May 28 2003, Chris Mason wrote:
> On Wed, 2003-05-28 at 09:08, Jens Axboe wrote:
> > > > 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 think we've got a few different problems. On SMP boxes, you need to
> have the fix-pausing patch from andrea applied to catch all the corner
> On UP boxes it's possible the requests are starving in the drive, SCSI
> users should try with the max tags set down to something sensible,
> between 8 and 32.
> IDE people can try lowering the max_kb_per_request paramater in
> /proc/ide/<drive>/settings, but this should only affect starvation with
> the writeback cache on.
> I made a patch a while ago that timed how long people spent waiting in
> __get_request_wait, it might help us figure out where the starvation is
> really happening.
But this seems totally unrelated to the reported problems, we are
talking about complete stalls of the mouse. No amount of io starvation
should provoke something like that.
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/