The patch titled
Subject: mm/swap: add comments on locks in swap_slots.h
has been added to the -mm tree. Its filename is
mm-swap-add-cache-for-swap-slots-allocation-fix-2.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-swap-add-cache-for-swap-slots-allocation-fix-2.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-swap-add-cache-for-swap-slots-allocation-fix-2.patch
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------------------------------------------------------
From: Tim Chen <tim.c.chen@xxxxxxxxxxxxxxx>
Subject: mm/swap: add comments on locks in swap_slots.h
Explains what each lock protects in swap_slots_cache structure.
Link: http://lkml.kernel.org/r/20170118180327.GA24225@xxxxxxxxxxxxxxx
Signed-off-by: Tim Chen <tim.c.chen@xxxxxxxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/swap_slots.h | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff -puN include/linux/swap_slots.h~mm-swap-add-cache-for-swap-slots-allocation-fix-2 include/linux/swap_slots.h
--- a/include/linux/swap_slots.h~mm-swap-add-cache-for-swap-slots-allocation-fix-2
+++ a/include/linux/swap_slots.h
@@ -11,11 +11,11 @@
struct swap_slots_cache {
bool lock_initialized;
- struct mutex alloc_lock;
+ struct mutex alloc_lock; /* protects slots, nr, cur */
swp_entry_t *slots;
int nr;
int cur;
- spinlock_t free_lock;
+ spinlock_t free_lock; /* protects slots_ret, n_ret */
swp_entry_t *slots_ret;
int n_ret;
};
_
Patches currently in -mm which might be from tim.c.chen@xxxxxxxxxxxxxxx are
mm-swap-skip-read-ahead-for-unreferenced-swap-slots.patch
mm-swap-allocate-swap-slots-in-batches.patch
mm-swap-free-swap-slots-in-batch.patch
mm-swap-add-cache-for-swap-slots-allocation.patch
mm-swap-add-cache-for-swap-slots-allocation-fix-2.patch
mm-swap-enable-swap-slots-cache-usage.patch
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