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

From: Jan Kara
Date: Mon May 19 2008 - 18:40:24 EST

> 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.
Hmm, this is worse than I'd have expected :( If it is that bad, I
think we should really enable them by default... I can give your script
a try on my test machine when I get back (which is next week).

Jan Kara <jack@xxxxxxx>
SuSE CR Labs
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