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Re: [PATCH 00/14] repair memory usage reductions

To: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Subject: Re: [PATCH 00/14] repair memory usage reductions
From: Geoffrey Wehrman <gwehrman@xxxxxxx>
Date: Thu, 3 Sep 2009 15:49:40 -0500
Cc: xfs@xxxxxxxxxxx
In-reply-to: <20090902175531.469184575@xxxxxxxxxxxxxxxxxxxxxx>
References: <20090902175531.469184575@xxxxxxxxxxxxxxxxxxxxxx>
User-agent: Mutt/1.5.14 (2007-02-12)
On Wed, Sep 02, 2009 at 01:55:31PM -0400, Christoph Hellwig wrote:
| This is a respin of the patches Barry Naujok wrote at SGI for reducing
| the memory usage in repair.  I've split it up, fixed a few small bugs
| and added two preparatory cleanups - but all the real work is Barry's.
| There has been lots of heavy testing on large filesystems by Barry
| on the original patches, and quite a lot of testing on slightly smaller
| filesystems by me.  These were all ad-hoc tests as XFSQA coverage is
| rather low on repair.  My plan is to add various additional testcase
| for XFSQA both for intentional corruptions as well as reproducing past
| reported bugs before we'll release these patches in xfsprogs.  But I think
| it would be good if we could get them into the development git tree to
| get wider coverage already.

How do these changes affect xfs_repair I/O performance?  Barry changes
were previously withheld within SGI due to a regression in performance.

Geoffrey Wehrman  651-683-5496  gwehrman@xxxxxxx

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