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authorMark Fasheh <mark.fasheh@oracle.com>2006-09-08 14:43:18 -0700
committerMark Fasheh <mark.fasheh@oracle.com>2006-09-24 13:50:43 -0700
commit80c05846f604bab6d61e9732c262420ee9f5f358 (patch)
tree3fcd80cec6e3a3a1e56abaff0a559817dbcb95a2 /fs/ocfs2/cluster
parentd680efe9d8fe0eb99d9dd063a4def6b362cdb40d (diff)
ocfs2: Add dentry tracking API
Replace the dentry vote mechanism with a cluster lock which covers a set of dentries. This allows us to force d_delete() only on nodes which actually care about an unlink. Every node that does a ->lookup() gets a read only lock on the dentry, until an unlink during which the unlinking node, will request an exclusive lock, forcing the other nodes who care about that dentry to d_delete() it. The effect is that we retain a very lightweight ->d_revalidate(), and at the same time get to make large improvements to the average case performance of the ocfs2 unlink and rename operations. This patch adds the higher level API and the dentry manipulation code. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
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