memory cgroup enhancements: remember "a page is on active list of cgroup or not"
Remember page_cgroup is on active_list or not in page_cgroup->flags. Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Signed-off-by: YAMAMOTO Takashi <yamamoto@valinux.co.jp> Cc: Balbir Singh <balbir@linux.vnet.ibm.com> Cc: Pavel Emelianov <xemul@openvz.org> Cc: Paul Menage <menage@google.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Nick Piggin <nickpiggin@yahoo.com.au> Cc: Kirill Korotaev <dev@sw.ru> Cc: Herbert Poetzl <herbert@13thfloor.at> Cc: David Rientjes <rientjes@google.com> Cc: Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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@ -86,6 +86,7 @@ struct page_cgroup {
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int flags;
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};
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#define PAGE_CGROUP_FLAG_CACHE (0x1) /* charged as cache */
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#define PAGE_CGROUP_FLAG_ACTIVE (0x2) /* page is active in this cgroup */
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enum {
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MEM_CGROUP_TYPE_UNSPEC = 0,
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@ -213,11 +214,14 @@ clear_page_cgroup(struct page *page, struct page_cgroup *pc)
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static void __mem_cgroup_move_lists(struct page_cgroup *pc, bool active)
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{
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if (active)
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if (active) {
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pc->flags |= PAGE_CGROUP_FLAG_ACTIVE;
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list_move(&pc->lru, &pc->mem_cgroup->active_list);
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else
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} else {
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pc->flags &= ~PAGE_CGROUP_FLAG_ACTIVE;
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list_move(&pc->lru, &pc->mem_cgroup->inactive_list);
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}
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}
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int task_in_mem_cgroup(struct task_struct *task, const struct mem_cgroup *mem)
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{
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@ -403,7 +407,7 @@ retry:
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atomic_set(&pc->ref_cnt, 1);
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pc->mem_cgroup = mem;
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pc->page = page;
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pc->flags = 0;
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pc->flags = PAGE_CGROUP_FLAG_ACTIVE;
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if (ctype == MEM_CGROUP_CHARGE_TYPE_CACHE)
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pc->flags |= PAGE_CGROUP_FLAG_CACHE;
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