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authorLi Zefan <lizf@cn.fujitsu.com>2009-06-17 16:27:15 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-06-18 13:03:47 -0700
commit338c843108bf5030d6765f4405126e70f8b77845 (patch)
treec3bdab2f288e4c5a843ea07e0f8938a821ab848a /mm/memcontrol.c
parent302362c5abdda80b5c2e4e57be610c2e3c2ab3c5 (diff)
downloadop-kernel-dev-338c843108bf5030d6765f4405126e70f8b77845.zip
op-kernel-dev-338c843108bf5030d6765f4405126e70f8b77845.tar.gz
memcg: remove some redundant checks
We don't need to check do_swap_account in the case that the function which checks do_swap_account will never get called if do_swap_account == 0. Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> Cc: Balbir Singh <balbir@linux.vnet.ibm.com> Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/memcontrol.c')
-rw-r--r--mm/memcontrol.c11
1 files changed, 4 insertions, 7 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 6f68290..3468c38 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -45,7 +45,7 @@ struct cgroup_subsys mem_cgroup_subsys __read_mostly;
#define MEM_CGROUP_RECLAIM_RETRIES 5
#ifdef CONFIG_CGROUP_MEM_RES_CTLR_SWAP
-/* Turned on only when memory cgroup is enabled && really_do_swap_account = 0 */
+/* Turned on only when memory cgroup is enabled && really_do_swap_account = 1 */
int do_swap_account __read_mostly;
static int really_do_swap_account __initdata = 1; /* for remember boot option*/
#else
@@ -1763,16 +1763,14 @@ static int mem_cgroup_resize_limit(struct mem_cgroup *memcg,
return ret;
}
-int mem_cgroup_resize_memsw_limit(struct mem_cgroup *memcg,
- unsigned long long val)
+static int mem_cgroup_resize_memsw_limit(struct mem_cgroup *memcg,
+ unsigned long long val)
{
int retry_count;
u64 memlimit, oldusage, curusage;
int children = mem_cgroup_count_children(memcg);
int ret = -EBUSY;
- if (!do_swap_account)
- return -EINVAL;
/* see mem_cgroup_resize_res_limit */
retry_count = children * MEM_CGROUP_RECLAIM_RETRIES;
oldusage = res_counter_read_u64(&memcg->memsw, RES_USAGE);
@@ -2007,8 +2005,7 @@ static u64 mem_cgroup_read(struct cgroup *cont, struct cftype *cft)
val = res_counter_read_u64(&mem->res, name);
break;
case _MEMSWAP:
- if (do_swap_account)
- val = res_counter_read_u64(&mem->memsw, name);
+ val = res_counter_read_u64(&mem->memsw, name);
break;
default:
BUG();
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