From: Theodore Tso <tytso@mit.edu>
To: Eric Sandeen <sandeen@redhat.com>
Cc: ext4 development <linux-ext4@vger.kernel.org>
Subject: Re: delalloc is crippling fs_mark performance
Date: Sat, 19 Jul 2008 13:20:15 -0400 [thread overview]
Message-ID: <20080719172015.GB9424@mit.edu> (raw)
In-Reply-To: <48820BE2.6080800@redhat.com>
On Sat, Jul 19, 2008 at 10:44:34AM -0500, Eric Sandeen wrote:
>
> With delalloc, the lg_prealloc list seems to just grow & grow in
> ext4_mb_use_preallocated, searching up to 90,000 entries before finding
> something, I think this is what's hurting - I need to look into how this
> should work.
Hmm, this may explain Holger's benchmark regressions.
- Ted
next prev parent reply other threads:[~2008-07-19 17:20 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-07-18 16:11 delalloc is crippling fs_mark performance Eric Sandeen
2008-07-18 23:00 ` Eric Sandeen
2008-07-19 15:44 ` Eric Sandeen
2008-07-19 17:20 ` Theodore Tso [this message]
2008-07-21 9:37 ` Aneesh Kumar K.V
2008-07-21 16:22 ` Eric Sandeen
2008-07-21 22:39 ` Andreas Dilger
2008-07-22 11:11 ` Aneesh Kumar K.V
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