[GFS2] gfs2_alloc_required performance

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This is a small I/O performance enhancement to gfs2.  (Actually, it is a rework of
an earlier version I got wrong).  The idea here is to check if the write extends
past the last block in the file.  If so, the function can save itself a lot of
time and trouble because it knows an allocate will be required.  Benchmarks like
iozone should see better performance.

Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>

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Bob Peterson 2008-01-11 13:44:50 -06:00 • committed by Steven Whitehouse

parent 598278bd48

commit 0522053519

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fs/gfs2/bmap.c

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