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TAKE 981498 - optimize xfs_ichgtime

To: sgi.bugs.xfs@xxxxxxxxxxxx, xfs@xxxxxxxxxxx
Subject: TAKE 981498 - optimize xfs_ichgtime
From: lachlan@xxxxxxx (Lachlan McIlroy)
Date: Wed, 6 Aug 2008 14:51:11 +1000 (EST)
Sender: xfs-bounce@xxxxxxxxxxx
optimize xfs_ichgtime

Port a little optmization from file_update_time to xfs_ichgtime, and
only update the timestamp and mark the inode dirty if the timestamp
actually changes in the timer tick resultion supported by the running
kernel.


Signed-off-by: Christoph Hellwig <hch@xxxxxx>

Date:  Wed Aug  6 14:50:29 AEST 2008
Workarea:  redback.melbourne.sgi.com:/home/lachlan/isms/2.6.x-mm
Inspected by:  
hch
lachlan
Author:  lachlan

The following file(s) were checked into:
  longdrop.melbourne.sgi.com:/isms/linux/2.6.x-xfs-melb


Modid:  xfs-linux-melb:xfs-kern:31827a
fs/xfs/linux-2.6/xfs_iops.c - 1.298 - changed
http://oss.sgi.com/cgi-bin/cvsweb.cgi/xfs-linux/linux-2.6/xfs_iops.c.diff?r1=text&tr1=1.298&r2=text&tr2=1.297&f=h
        - optimize xfs_ichgtime




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