Re: [PATCH] io stalls (was: -rc7 Re: Linux 2.4.21-rc6)

From: Chris Mason (
Date: Wed Jun 11 2003 - 07:24:14 EST

On Tue, 2003-06-10 at 22:10, Andrea Arcangeli wrote:
> On Tue, Jun 10, 2003 at 09:57:11PM -0400, Chris Mason wrote:
> > Ok, I see your point, we don't strictly need the waited check. I had
> > added it as an optimization at first, so that those who waited once were
> > not penalized by further queue_full checks.
> I could taste the feeling of not penalizing while reading the code but
> that's just a feeling, in reality if they blocked it means they set full
> by themself and there was no request so they want to go to sleep no
> matter ->full or not ;)

You're completely right, as the patch changed I didn't realize waited
wasn't needed anymore ;-)

Are you adding the hunk from yesterday to avoid unplugs when q->rq.count
!= 0?


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