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Date: Wed, 26 Feb 2014 08:53:59 -0600
From: Mark Tinguely <tinguely@sgi.com>
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Subject: Re: [PATCH] [RFC] xfs: byte range buffer dirty region tracking
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To: Dave Chinner <david@fromorbit.com>
Cc: xfs@oss.sgi.com

On 02/23/14 16:25, Dave Chinner wrote:
> From: Dave Chinner<dchinner@redhat.com>
> Switching this to just track the first and last modified bytes in
> the block and only converting that to a dirty bitmap in the buffer
> log item at format time, however, gets rid of most of this dirty
> bitmap overhead without increasing memcpy time  at all. the result
> is that peformance on a 64k directory block size increases to
> roughly 16,000 files/s with memcpy() overhead only slightly
> increasing.

Looks interesting. 4 regions seems reasonable to me.


--Mark.


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