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authorTim Chen <tim.c.chen@linux.intel.com>2017-05-04 00:54:48 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2017-05-04 01:52:10 +0300
commit9b7a814327a314c56c0e68654c76d99bd2938084 (patch)
treebb960ea71be69691b4ff1280fea4d4e93e3e9174
parent9927e3887642b976d9b391cd77d71388aa521e54 (diff)
downloadlinux-9b7a814327a314c56c0e68654c76d99bd2938084.tar.xz
mm/swap_slots.c: add warning if swap slots cache failed to initialize
Add a warning diagnostics to user if we failed to allocate swap slots cache and use it. [akpm@linux-foundation.org: use WARN_ONCE return value, fix grammar in message] Link: http://lkml.kernel.org/r/20170328234827.GA10107@linux.intel.com Signed-off-by: Tim Chen <tim.c.chen@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--mm/swap_slots.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/mm/swap_slots.c b/mm/swap_slots.c
index b1ccb58ad397..aa1c415f4abd 100644
--- a/mm/swap_slots.c
+++ b/mm/swap_slots.c
@@ -241,8 +241,10 @@ int enable_swap_slots_cache(void)
ret = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "swap_slots_cache",
alloc_swap_slot_cache, free_slot_cache);
- if (ret < 0)
+ if (WARN_ONCE(ret < 0, "Cache allocation failed (%s), operating "
+ "without swap slots cache.\n", __func__))
goto out_unlock;
+
swap_slot_cache_initialized = true;
__reenable_swap_slots_cache();
out_unlock: