From: Andi Kleen <andi@firstfloor.org>
To: Stewart Smith <stewart@mysql.com>
Cc: David Chinner <dgc@sgi.com>, Andi Kleen <andi@firstfloor.org>,
xfs-oss <xfs@oss.sgi.com>, lkml <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 2/9]: Reduce Log I/O latency
Date: Thu, 22 Nov 2007 13:06:11 +0100 [thread overview]
Message-ID: <20071122120611.GA3573@one.firstfloor.org> (raw)
In-Reply-To: <1195702123.8369.78.camel@localhost.localdomain>
> FWIW from a "real time" database POV this seems to make sense to me...
> in fact, we probably rely on filesystem metadata way too much
> (historically it's just "worked".... although we do seem to get issues
> on ext3).
For that case you really would need priority inheritance: any metadata
IO on behalf or blocking a process needs to use the process' block IO
priority.
David's change just fixes a limited set of cases, but breaks others.
-Andi
next prev parent reply other threads:[~2007-11-22 12:06 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20071122003339.GH114266761__34694.2978365861$1195691722$gmane$org@sgi.com>
2007-11-22 0:49 ` [PATCH 2/9]: Reduce Log I/O latency Andi Kleen
2007-11-22 1:12 ` David Chinner
2007-11-22 2:57 ` Matt Mackall
2007-11-22 3:41 ` David Chinner
2007-11-22 7:25 ` Matt Mackall
2007-11-22 10:31 ` David Chinner
2007-11-22 18:10 ` Matt Mackall
2007-11-22 22:29 ` David Chinner
2007-11-22 23:09 ` David Chinner
2007-11-23 0:21 ` Matt Mackall
2007-11-23 0:20 ` Matt Mackall
2007-11-22 3:28 ` Stewart Smith
2007-11-22 12:06 ` Andi Kleen [this message]
2007-11-22 13:15 ` David Chinner
2007-11-23 2:53 ` Andi Kleen
2007-11-23 4:03 ` David Chinner
2007-11-23 12:01 ` Andi Kleen
2007-11-24 18:43 ` Matt Mackall
2007-11-22 0:33 David Chinner
2007-11-26 2:11 ` Lachlan McIlroy
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