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Re: possible fsync02() xfs slowness regression on power7

To: Dave Chinner <david@xxxxxxxxxxxxx>
Subject: Re: possible fsync02() xfs slowness regression on power7
From: CAI Qian <caiqian@xxxxxxxxxx>
Date: Sun, 3 Mar 2013 23:23:26 -0500 (EST)
Cc: xfs@xxxxxxxxxxx
Delivered-to: xfs@xxxxxxxxxxx
In-reply-to: <220575861.7590457.1362129618880.JavaMail.root@xxxxxxxxxx>
> > And this commit in 3.9-rc1:
> > 
> > a1e16c2 xfs: limit speculative prealloc size on sparse files
> > should fix the problem. Please confirm these commits are the cause
> > and the fix respectively....
Confirmed this fixed the problem. I'd like to request this to be back-ported
to stable-3.0, stable-3.4 and stable-3.8. What do you think?

Thanks,
CAI Qian

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