mm: slub: SLUB_DEBUG=n: use the same alloc/free hooks as for SLUB_DEBUG=y
There are two versions of alloc/free hooks now - one for CONFIG_SLUB_DEBUG=y and another one for CONFIG_SLUB_DEBUG=n. I see no reason why calls to other debugging subsystems (LOCKDEP, DEBUG_ATOMIC_SLEEP, KMEMCHECK and FAILSLAB) are hidden under SLUB_DEBUG. All this features should work regardless of SLUB_DEBUG config, as all of them already have own Kconfig options. This also fixes failslab for CONFIG_SLUB_DEBUG=n configuration. It simply has not worked before because should_failslab() call was in a hook hidden under "#ifdef CONFIG_SLUB_DEBUG #else". Note: There is one concealed change in allocation path for SLUB_DEBUG=n and all other debugging features disabled. The might_sleep_if() call can generate some code even if DEBUG_ATOMIC_SLEEP=n. For PREEMPT_VOLUNTARY=y might_sleep() inserts _cond_resched() call, but I think it should be ok. Signed-off-by:Andrey Ryabinin <a.ryabinin@samsung.com> Cc: Christoph Lameter <cl@linux.com> Cc: Pekka Enberg <penberg@kernel.org> Cc: David Rientjes <rientjes@google.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
parent
c07b8183
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