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| author | Sebastian Andrzej Siewior <bigeasy@linutronix.de> | 2018-08-17 15:49:55 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-08-17 16:20:32 -0700 |
| commit | 6b51e88199ca4f75ff647eff28efd30bfcb08dc4 (patch) | |
| tree | 6c1411444d28a3a77c36bfddb92576b43469245f /mm/workingset.c | |
| parent | 6e018968f8d384d84484eba8e4c90489a25d7095 (diff) | |
| download | linux-6b51e88199ca4f75ff647eff28efd30bfcb08dc4.tar.gz | |
mm/list_lru: introduce list_lru_shrink_walk_irq()
Provide list_lru_shrink_walk_irq() and let it behave like list_lru_walk_one() except that it locks the spinlock with spin_lock_irq(). This is used by scan_shadow_nodes() because its lock nests within the i_pages lock which is acquired with IRQ. This change allows to use proper locking promitives instead hand crafted lock_irq_disable() plus spin_lock(). There is no EXPORT_SYMBOL provided because the current user is in-kernel only. Add list_lru_shrink_walk_irq() which acquires the spinlock with the proper locking primitives. Link: http://lkml.kernel.org/r/20180716111921.5365-5-bigeasy@linutronix.de Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Reviewed-by: Vladimir Davydov <vdavydov.dev@gmail.com> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/workingset.c')
| -rw-r--r-- | mm/workingset.c | 8 |
1 files changed, 2 insertions, 6 deletions
diff --git a/mm/workingset.c b/mm/workingset.c index bc72ad029b3e..4516dd790129 100644 --- a/mm/workingset.c +++ b/mm/workingset.c @@ -483,13 +483,9 @@ out: static unsigned long scan_shadow_nodes(struct shrinker *shrinker, struct shrink_control *sc) { - unsigned long ret; - /* list_lru lock nests inside the IRQ-safe i_pages lock */ - local_irq_disable(); - ret = list_lru_shrink_walk(&shadow_nodes, sc, shadow_lru_isolate, NULL); - local_irq_enable(); - return ret; + return list_lru_shrink_walk_irq(&shadow_nodes, sc, shadow_lru_isolate, + NULL); } static struct shrinker workingset_shadow_shrinker = { |