From: Ric Wheeler <rwheeler@redhat.com>
To: Theodore Tso <tytso@mit.edu>
Cc: Andreas Dilger <adilger@sun.com>, Josef Bacik <jbacik@redhat.com>,
linux-ext4@vger.kernel.org
Subject: Re: [PATCH] imporve jbd2 fsync batching
Date: Thu, 06 Nov 2008 07:45:38 -0500 [thread overview]
Message-ID: <4912E6F2.6010705@redhat.com> (raw)
In-Reply-To: <20081106002727.GB8168@mit.edu>
Theodore Tso wrote:
> On Wed, Nov 05, 2008 at 04:10:12PM -0700, Andreas Dilger wrote:
>
>> There was no reply to my previous comments about making the maximum sleep
>> time be a fixed value (e.g. 15ms) instead of having it arbitrarily based
>> on the jiffies value, which may change between 1ms and 10ms.
>>
>
> I know the whole point is to make it be self-tuning, but I wonder if
> we should have some knobs to control the min and max sleep times.
>
> - Ted
>
I think that it could be useful to have a tunable knob for the max sleep
time. It would certainly be capped at a much lower level for a RAM disk
than it would be for a very large RAID volume...
Ric
next prev parent reply other threads:[~2008-11-06 12:46 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-11-04 16:10 [PATCH] imporve jbd2 fsync batching Josef Bacik
2008-11-04 20:52 ` Theodore Tso
2008-11-04 22:15 ` Leroy van Logchem
2008-11-05 23:10 ` Andreas Dilger
2008-11-06 0:27 ` Theodore Tso
2008-11-06 12:45 ` Ric Wheeler [this message]
2008-11-25 10:22 ` [PATCH] ext4: add fsync batch tuning knobs Theodore Tso
2008-12-02 14:45 ` Aneesh Kumar K.V
2008-11-06 14:35 ` [PATCH] imporve jbd2 fsync batching Josef Bacik
2008-11-25 10:23 ` Theodore Tso
2008-11-25 22:41 ` Andreas Dilger
2008-11-26 5:10 ` Theodore Tso
2008-11-26 13:18 ` Josef Bacik
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