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| author | Johannes Weiner <hannes@cmpxchg.org> | 2011-03-23 16:42:33 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-03-23 19:46:29 -0700 |
| commit | e7018b8d27e0c9aa2200e5b393e0fe9093c6565c (patch) | |
| tree | 13a4d92cd78bc6f97d9a2b6d77880c9ea5d67aa1 /mm/memcontrol.c | |
| parent | bf1ff2635a5fda207fc870df348bfc766e8dcd4d (diff) | |
| download | lwn-e7018b8d27e0c9aa2200e5b393e0fe9093c6565c.tar.gz lwn-e7018b8d27e0c9aa2200e5b393e0fe9093c6565c.zip | |
memcg: keep only one charge cancelling function
We have two charge cancelling functions: one takes a page count, the other
a page size. The second one just divides the parameter by PAGE_SIZE and
then calls the first one. This is trivial, no need for an extra function.
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 | 22 |
1 files changed, 9 insertions, 13 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 8f9381976c59..09a450684f70 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -2031,21 +2031,17 @@ bypass: * gotten by try_charge(). */ static void __mem_cgroup_cancel_charge(struct mem_cgroup *mem, - unsigned long count) + unsigned int nr_pages) { if (!mem_cgroup_is_root(mem)) { - res_counter_uncharge(&mem->res, PAGE_SIZE * count); + unsigned long bytes = nr_pages * PAGE_SIZE; + + res_counter_uncharge(&mem->res, bytes); if (do_swap_account) - res_counter_uncharge(&mem->memsw, PAGE_SIZE * count); + res_counter_uncharge(&mem->memsw, bytes); } } -static void mem_cgroup_cancel_charge(struct mem_cgroup *mem, - int page_size) -{ - __mem_cgroup_cancel_charge(mem, page_size >> PAGE_SHIFT); -} - /* * A helper function to get mem_cgroup from ID. must be called under * rcu_read_lock(). The caller must check css_is_removed() or some if @@ -2104,7 +2100,7 @@ static void __mem_cgroup_commit_charge(struct mem_cgroup *mem, lock_page_cgroup(pc); if (unlikely(PageCgroupUsed(pc))) { unlock_page_cgroup(pc); - mem_cgroup_cancel_charge(mem, page_size); + __mem_cgroup_cancel_charge(mem, nr_pages); return; } /* @@ -2242,7 +2238,7 @@ static int mem_cgroup_move_account(struct page *page, struct page_cgroup *pc, mem_cgroup_charge_statistics(from, PageCgroupCache(pc), -nr_pages); if (uncharge) /* This is not "cancel", but cancel_charge does all we need. */ - mem_cgroup_cancel_charge(from, charge_size); + __mem_cgroup_cancel_charge(from, nr_pages); /* caller should have done css_get */ pc->mem_cgroup = to; @@ -2307,7 +2303,7 @@ static int mem_cgroup_move_parent(struct page *page, ret = mem_cgroup_move_account(page, pc, child, parent, true, page_size); if (ret) - mem_cgroup_cancel_charge(parent, page_size); + __mem_cgroup_cancel_charge(parent, page_size >> PAGE_SHIFT); if (page_size > PAGE_SIZE) compound_unlock_irqrestore(page, flags); @@ -2538,7 +2534,7 @@ void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *mem) return; if (!mem) return; - mem_cgroup_cancel_charge(mem, PAGE_SIZE); + __mem_cgroup_cancel_charge(mem, 1); } static void |