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Re: long hangs when deleting large directories (3.0-rc3)

To: Markus Trippelsdorf <markus@xxxxxxxxxxxxxxx>
Subject: Re: long hangs when deleting large directories (3.0-rc3)
From: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Date: Sat, 18 Jun 2011 10:24:56 -0400
Cc: xfs@xxxxxxxxxxx
In-reply-to: <20110618141950.GA1685@xxxxxxxxxxxxxx>
References: <20110618141950.GA1685@xxxxxxxxxxxxxx>
User-agent: Mutt/1.5.21 (2010-09-15)
On Sat, Jun 18, 2011 at 04:19:50PM +0200, Markus Trippelsdorf wrote:
> Running the latest git kernel (3.0-rc3) my machine hangs for long
> periods (1-2 sec) whenever I delete a large directory recursively on my
> xfs partition. During the hang I cannot move the mouse pointer or use
> the keyboard (but the music keeps playing without stuttering). A quick
> way to reproduce is to "rm -fr" a kernel tree. 

Does this also happen when using the deadline I/O schedule, that is
after a:

echo "deadline" > /sys/block/sda/queue/scheduler

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