From: Greg Freemyer <greg.freemyer@gmail.com>
To: Keith Mannthey <kmannth@us.ibm.com>
Cc: linux-ext4 <linux-ext4@vger.kernel.org>
Subject: Re: Ext4 performance regression: Post 2.6.30
Date: Mon, 29 Mar 2010 11:10:55 -0400 [thread overview]
Message-ID: <87f94c371003290810u58f64ce6uc20be6bbac420e73@mail.gmail.com> (raw)
In-Reply-To: <1269843935.13369.52.camel@keith-laptop>
On Mon, Mar 29, 2010 at 2:25 AM, Keith Mannthey <kmannth@us.ibm.com> wrote:
>
>
> After 2.6.30 I am seeing large performance regressions on a raid setup.
> I am working to publish a larger amount of data but I wanted to get some
> quick data out about what I am seeing.
>
Is mdraid involved?
They added barrier support for some configs after 2.6.30 I believe.
It can cause a drastic perf change, but it increases reliability and
is "correct".
Greg
next prev parent reply other threads:[~2010-03-29 15:10 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-03-29 6:25 Ext4 performance regression: Post 2.6.30 Keith Mannthey
2010-03-29 15:10 ` Greg Freemyer [this message]
2010-03-31 1:56 ` Keith Mannthey
2010-03-31 4:06 ` Eric Sandeen
2010-03-31 22:02 ` Keith Mannthey
2010-03-31 22:06 ` Greg Freemyer
2010-03-31 22:14 ` Keith Mannthey
2010-03-31 22:55 ` Greg Freemyer
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