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authorRyusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>2009-05-27 07:27:12 +0900
committerRyusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>2009-06-10 23:41:11 +0900
commite85dc1d5295779d2e6d973b7ed524d6bd3825a3f (patch)
tree8f13c049839deb9f6cde4deb440b2a3758f10f64 /Documentation/filesystems
parent30bda0b8ae470997dc681d6fd82108bac5caebf8 (diff)
nilfs2: enable sync_page method
This adds a missing sync_page method which unplugs bio requests when waiting for page locks. This will improve read performance of nilfs. Here is a measurement result using dd command. Without this patch: # mount -t nilfs2 /dev/sde1 /test # dd if=/test/aaa of=/dev/null bs=512k 1024+0 records in 1024+0 records out 536870912 bytes (537 MB) copied, 6.00688 seconds, 89.4 MB/s With this patch: # mount -t nilfs2 /dev/sde1 /test # dd if=/test/aaa of=/dev/null bs=512k 1024+0 records in 1024+0 records out 536870912 bytes (537 MB) copied, 3.54998 seconds, 151 MB/s Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
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