From: Andrew Morton <akpm@osdl.org>
To: Nick Piggin <piggin@cyberone.com.au>
Cc: schwidefsky@de.ibm.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: blk_congestion_wait racy?
Date: Tue, 9 Mar 2004 21:35:18 -0800 [thread overview]
Message-ID: <20040309213518.44adb33d.akpm@osdl.org> (raw)
In-Reply-To: <404EA645.8010900@cyberone.com.au>
Nick Piggin <piggin@cyberone.com.au> wrote:
>
> But I'm guessing that you have no requests in flight by the time
> blk_congestion_wait gets called, so nothing ever gets kicked.
That's why blk_congestion_wait() in -mm propagates the schedule_timeout()
return value. You can do:
if (blk_congestion_wait(...))
printk("ouch\n");
If your kernel says ouch much, we have a problem.
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next prev parent reply other threads:[~2004-03-10 5:35 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-03-09 17:54 Martin Schwidefsky
2004-03-10 5:23 ` Nick Piggin
2004-03-10 5:35 ` Andrew Morton [this message]
2004-03-10 5:47 ` Nick Piggin
-- strict thread matches above, loose matches on Subject: below --
2004-03-11 19:04 Martin Schwidefsky
2004-03-11 23:25 ` Andrew Morton
2004-03-12 2:31 ` Nick Piggin
2004-03-11 18:24 Martin Schwidefsky
2004-03-11 18:55 ` Andrew Morton
2004-03-08 13:38 Martin Schwidefsky
2004-03-08 23:50 ` Nick Piggin
2004-03-08 9:59 Martin Schwidefsky
2004-03-08 12:24 ` Andrew Morton
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