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authorJoonsoo Kim <iamjoonsoo.kim@lge.com>2013-06-19 14:05:52 +0900
committerPekka Enberg <penberg@kernel.org>2013-07-07 19:09:56 +0300
commit345c905d13a4ec9f774b6b4bc038fe4aef26cced (patch)
tree9b6177f5b4712ff78c3808b240e66079e8c8338f /init
parente7efa615ccf78394338144ff0187be331240748a (diff)
downloadlinux-345c905d13a4ec9f774b6b4bc038fe4aef26cced.tar.gz
slub: Make cpu partial slab support configurable
CPU partial support can introduce level of indeterminism that is not wanted in certain context (like a realtime kernel). Make it configurable. This patch is based on Christoph Lameter's "slub: Make cpu partial slab support configurable V2". Acked-by: Christoph Lameter <cl@linux.com> Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com> Signed-off-by: Pekka Enberg <penberg@kernel.org>
Diffstat (limited to 'init')
-rw-r--r--init/Kconfig11
1 files changed, 11 insertions, 0 deletions
diff --git a/init/Kconfig b/init/Kconfig
index 7d30240e5bf..3b34a88cf34 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -1511,6 +1511,17 @@ config SLOB
endchoice
+config SLUB_CPU_PARTIAL
+ default y
+ depends on SLUB
+ bool "SLUB per cpu partial cache"
+ help
+ Per cpu partial caches accellerate objects allocation and freeing
+ that is local to a processor at the price of more indeterminism
+ in the latency of the free. On overflow these caches will be cleared
+ which requires the taking of locks that may cause latency spikes.
+ Typically one would choose no for a realtime system.
+
config MMAP_ALLOW_UNINITIALIZED
bool "Allow mmapped anonymous memory to be uninitialized"
depends on EXPERT && !MMU