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authorMark Fasheh <mark.fasheh@oracle.com>2007-04-23 18:53:12 -0700
committerMark Fasheh <mark.fasheh@oracle.com>2007-04-26 15:10:40 -0700
commit83418978827324918a8cd25ce5227312de1d4468 (patch)
treef7baefb1fc8721d6d8d1f1f937bc55535b13e18f /drivers
parent7cdfc3a1c3971c9125c317cb8c2525745851798e (diff)
ocfs2: Cache extent records
The extent map code was ripped out earlier because of an inability to deal with holes. This patch adds back a simpler caching scheme requiring far less code. Our old extent map caching was designed back when meta data block caching in Ocfs2 didn't work very well, resulting in many disk reads. These days our metadata caching is much better, resulting in no un-necessary disk reads. As a result, extent caching doesn't have to be as fancy, nor does it have to cache as many extents. Keeping the last 3 extents seen should be sufficient to give us a small performance boost on some streaming workloads. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
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