GFS2: Don't waste time locking lru_lock for non-lru glocks

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Before this patch, glock_dq would call gfs2_glock_remove_from_lru.
For glocks that are never put on the LRU, such as the transaction
glock, this just takes the spin_lock, determines there's nothing to
be done because the list is empty, then unlocks again. This was
causing unnecessary lock contention on the lru_lock spin_lock.
This patch adds a check for GLOF_LRU in the glops before taking
the spin_lock.

Signed-off-by: Bob Peterson <rpeterso@redhat.com>

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Bob Peterson 2017-07-26 10:57:35 -05:00

parent 2d821a8b71

commit 645ebd49f0

1 changed files with 3 additions and 0 deletions

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fs/gfs2/glock.c

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