Commit 9b7a8143 authored May 03, 2017 by Tim Chen Committed by Linus Torvalds May 03, 2017

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>

parent 9927e388

mm/swap_slots.c

+3 −1

Original line number	Diff line number	Diff line
		@@ -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:

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