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Message-Id: <1218822772.15342.503.camel@think.oraclecorp.com>
Date: Fri, 15 Aug 2008 13:52:52 -0400
From: Chris Mason <chris.mason@...cle.com>
To: Theodore Tso <tytso@....edu>
Cc: Andi Kleen <andi@...stfloor.org>,
Peter Zijlstra <peterz@...radead.org>,
linux-btrfs <linux-btrfs@...r.kernel.org>,
linux-kernel <linux-kernel@...r.kernel.org>,
linux-fsdevel <linux-fsdevel@...r.kernel.org>
Subject: Re: Btrfs v0.16 released
On Fri, 2008-08-15 at 09:45 -0400, Theodore Tso wrote:
> On Fri, Aug 15, 2008 at 08:46:01AM -0400, Chris Mason wrote:
> > Whoops the link above is wrong, try:
> >
> > http://oss.oracle.com/~mason/compilebench
>
> Thanks, I figured it out.
>
> > It is worth noting that the end throughput doesn't matter quite as much
> > as the writeback pattern. Ext4 is pretty solid on this test, with very
> > consistent results.
>
> There were two reasons why I wanted to play with compilebench. The
> first is we have a fragmentation problem with delayed allocation and
> small files getting forced out due to memory pressure, that we've been
> working for the past week.
Have you tried this one:
http://article.gmane.org/gmane.linux.file-systems/25560
This bug should cause fragmentation on small files getting forced out
due to memory pressure in ext4. But, I wasn't able to really
demonstrate it with ext4 on my machine.
-chris
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