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authorChristoph Lameter <clameter@sgi.com>2008-04-14 18:53:02 +0300
committerPekka Enberg <penberg@cs.helsinki.fi>2008-04-14 18:53:02 +0300
commit0f389ec63077521166f071e1e970aed36147fd45 (patch)
treeb1f2159c652c48160dde31e6740870ae0589dffb /init
parent49bd5221ce8fb55d12c04a3ffd375201c5bbfb7a (diff)
downloadlinux-stericsson-0f389ec63077521166f071e1e970aed36147fd45.tar.gz
slub: No need for per node slab counters if !SLUB_DEBUG
The per node counters are used mainly for showing data through the sysfs API. If that API is not compiled in then there is no point in keeping track of this data. Disable counters for the number of slabs and the number of total slabs if !SLUB_DEBUG. Incrementing the per node counters is also accessing a potentially contended cacheline so this could actually be a performance benefit to embedded systems. SLABINFO support is also affected. It now must depends on SLUB_DEBUG (which is on by default). Patch also avoids a check for a NULL kmem_cache_node pointer in new_slab() if the system is not compiled with NUMA support. [penberg@cs.helsinki.fi: fix oops and move ->nr_slabs into CONFIG_SLUB_DEBUG] Signed-off-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
Diffstat (limited to 'init')
-rw-r--r--init/Kconfig2
1 files changed, 1 insertions, 1 deletions
diff --git a/init/Kconfig b/init/Kconfig
index a97924bc5b8d..7fccf09bb95a 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -763,7 +763,7 @@ endmenu # General setup
config SLABINFO
bool
depends on PROC_FS
- depends on SLAB || SLUB
+ depends on SLAB || SLUB_DEBUG
default y
config RT_MUTEXES