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| author | Johannes Weiner <hannes@cmpxchg.org> | 2011-03-23 16:42:35 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-03-23 19:46:30 -0700 |
| commit | 7ffd4ca7a2cdd7a18f0b499a4e9e0e7cf36ba018 (patch) | |
| tree | 1a2678ce91b9dfb2118d19e0ec457ca5582793f9 /mm/memcontrol.c | |
| parent | 11c9ea4e80fc3be83485667204c68d0a732f3757 (diff) | |
| download | lwn-7ffd4ca7a2cdd7a18f0b499a4e9e0e7cf36ba018.tar.gz lwn-7ffd4ca7a2cdd7a18f0b499a4e9e0e7cf36ba018.zip | |
memcg: convert uncharge batching from bytes to page granularity
We never uncharge subpage quantities.
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp>
Cc: Balbir Singh <balbir@linux.vnet.ibm.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.c | 18 |
1 files changed, 10 insertions, 8 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 91120a04f935..9dfbed2aacc9 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -2579,9 +2579,9 @@ __do_uncharge(struct mem_cgroup *mem, const enum charge_type ctype, if (batch->memcg != mem) goto direct_uncharge; /* remember freed charge and uncharge it later */ - batch->bytes += PAGE_SIZE; + batch->nr_pages++; if (uncharge_memsw) - batch->memsw_bytes += PAGE_SIZE; + batch->memsw_nr_pages++; return; direct_uncharge: res_counter_uncharge(&mem->res, page_size); @@ -2708,8 +2708,8 @@ void mem_cgroup_uncharge_start(void) /* We can do nest. */ if (current->memcg_batch.do_batch == 1) { current->memcg_batch.memcg = NULL; - current->memcg_batch.bytes = 0; - current->memcg_batch.memsw_bytes = 0; + current->memcg_batch.nr_pages = 0; + current->memcg_batch.memsw_nr_pages = 0; } } @@ -2730,10 +2730,12 @@ void mem_cgroup_uncharge_end(void) * This "batch->memcg" is valid without any css_get/put etc... * bacause we hide charges behind us. */ - if (batch->bytes) - res_counter_uncharge(&batch->memcg->res, batch->bytes); - if (batch->memsw_bytes) - res_counter_uncharge(&batch->memcg->memsw, batch->memsw_bytes); + if (batch->nr_pages) + res_counter_uncharge(&batch->memcg->res, + batch->nr_pages * PAGE_SIZE); + if (batch->memsw_nr_pages) + res_counter_uncharge(&batch->memcg->memsw, + batch->memsw_nr_pages * PAGE_SIZE); memcg_oom_recover(batch->memcg); /* forget this pointer (for sanity check) */ batch->memcg = NULL; |