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authorMiao Xie <miaox@cn.fujitsu.com>2013-01-29 10:09:20 +0000
committerJosef Bacik <jbacik@fusionio.com>2013-02-20 12:59:04 -0500
commite2d845211eda9cf296e8edf6724b3d541f4fbfd5 (patch)
tree69acdf4bfe81d173673fee8d8104393e4b73681e /fs/Makefile
parentc018daecead7a46a575e2a1397fea850b83396c8 (diff)
Btrfs: use percpu counter for dirty metadata count
->dirty_metadata_bytes is accessed very frequently, so use percpu counter instead of the u64 variant to reduce the contention of the lock. This patch also fixed the problem that we access it without lock protection in __btrfs_btree_balance_dirty(), which may cause we skip the dirty pages flush. Signed-off-by: Miao Xie <miaox@cn.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
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