linux-ext4 - Re: [PATCH 0/4] (RESEND) ext3[34] barrier changes

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Date:	Mon, 19 May 2008 14:39:36 -0400
From:	Chris Mason <chris.mason@...cle.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Eric Sandeen <sandeen@...hat.com>, Theodore Tso <tytso@....edu>,
	Andi Kleen <andi@...stfloor.org>, linux-ext4@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org
Subject: Re: [PATCH 0/4] (RESEND) ext3[34] barrier changes

On Monday 19 May 2008, Chris Mason wrote:
>
> Here's a test workload that corrupts ext3 50% of the time on power fail
> testing for me.  The machine in this test is my poor dell desktop (3ghz,
> dual core, 2GB of ram), and the power controller is me walking over and
> ripping the plug out the back.

Here's a new version that still gets about corruptions 50% of the time, but 
does it with fewer files by using longer file names (240 chars instead of 160 
chars).

I tested this one with a larger FS (40GB instead of 2GB) and larger log (128MB 
instead of 32MB).  barrier-test -s 32 -p 1500 was still able to get a 50% 
corruption rate on the larger FS.

-chris

Download attachment "barrier-test" of type "application/x-python" (6070 bytes)