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authorSteven Whitehouse <swhiteho@redhat.com>2009-11-27 10:31:11 +0000
committerSteven Whitehouse <swhiteho@redhat.com>2009-12-03 12:00:12 +0000
commit26bb7505cf7db3560286be9f6384b6d3911f78b5 (patch)
tree0fcdf84b70a9effe7ab9c661dca74b6a4b4afb31 /drivers/net
parentc29cd9004e72acb5a6cb8caf08508f1c5edee686 (diff)
GFS2: Fix glock refcount issues
This patch fixes some ref counting issues. Firstly by moving the point at which we drop the ref count after a dlm lock operation has completed we ensure that we never call gfs2_glock_hold() on a lock with a zero ref count. Secondly, by using atomic_dec_and_lock() in gfs2_glock_put() we ensure that at no time will a glock with zero ref count appear on the lru_list. That means that we can remove the check for this in our shrinker (which was racy). Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
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