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authorDave Chinner <dchinner@redhat.com>2010-09-24 13:59:15 +0400
committerAlex Elder <aelder@sgi.com>2010-10-19 00:07:57 +0400
commit50f59e8eed85ec4c79bc2454ed50c7886f6c5ebf (patch)
treeffb2fa359ee0751ce2f0f6dd29afc39eeda1ca86 /fs/xfs/linux-2.6/xfs_aops.h
parent74f75a0cb7033918eb0fa4a50df25091ac75c16e (diff)
downloadlinux-50f59e8eed85ec4c79bc2454ed50c7886f6c5ebf.tar.xz
xfs: pack xfs_buf structure more tightly
pahole reports the struct xfs_buf has quite a few holes in it, so packing the structure better will reduce the size of it by 16 bytes. Also, move all the fields used in cache lookups into the first cacheline. Before on x86_64: /* size: 320, cachelines: 5 */ /* sum members: 298, holes: 6, sum holes: 22 */ After on x86_64: /* size: 304, cachelines: 5 */ /* padding: 6 */ /* last cacheline: 48 bytes */ Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Alex Elder <aelder@sgi.com>
Diffstat (limited to 'fs/xfs/linux-2.6/xfs_aops.h')
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