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memcg: make memcg's file mapped consistent with global VM 

In global VM, FILE_MAPPED is used but memcg uses MAPPED_FILE.  This makes
grep difficult.  Replace memcg's MAPPED_FILE with FILE_MAPPED

And in global VM, mapped shared memory is accounted into FILE_MAPPED.
But memcg doesn't. fix it.
Note:
  page_is_file_cache() just checks SwapBacked or not.
  So, we need to check PageAnon.

Cc: Balbir Singh <balbir@in.ibm.com>
Reviewed-by: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp>
Signed-off-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>
This commit is contained in:
KAMEZAWA Hiroyuki 2009-12-15 16:47:09 -08:00 committed by Linus Torvalds
parent cdec2e4265
commit d8046582d5
3 changed files with 13 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
include/linux/memcontrol.h
View File

@ -122,7 +122,7 @@ static inline bool mem_cgroup_disabled(void)
}
extern bool mem_cgroup_oom_called(struct task_struct *task);
void mem_cgroup_update_mapped_file_stat(struct page *page, int val);
void mem_cgroup_update_file_mapped(struct page *page, int val);
unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order,
gfp_t gfp_mask, int nid,
int zid);
@ -287,7 +287,7 @@ mem_cgroup_print_oom_info(struct mem_cgroup *memcg, struct task_struct *p)
{
}
static inline void mem_cgroup_update_mapped_file_stat(struct page *page,
static inline void mem_cgroup_update_file_mapped(struct page *page,
int val)
{
}

21
mm/memcontrol.c
View File

@ -67,7 +67,7 @@ enum mem_cgroup_stat_index {
*/
MEM_CGROUP_STAT_CACHE, /* # of pages charged as cache */
MEM_CGROUP_STAT_RSS, /* # of pages charged as anon rss */
MEM_CGROUP_STAT_MAPPED_FILE, /* # of pages charged as file rss */
MEM_CGROUP_STAT_FILE_MAPPED, /* # of pages charged as file rss */
MEM_CGROUP_STAT_PGPGIN_COUNT, /* # of pages paged in */
MEM_CGROUP_STAT_PGPGOUT_COUNT, /* # of pages paged out */
MEM_CGROUP_STAT_EVENTS, /* sum of pagein + pageout for internal use */
@ -1227,7 +1227,7 @@ static void record_last_oom(struct mem_cgroup *mem)
* Currently used to update mapped file statistics, but the routine can be
* generalized to update other statistics as well.
*/
void mem_cgroup_update_mapped_file_stat(struct page *page, int val)
void mem_cgroup_update_file_mapped(struct page *page, int val)
{
struct mem_cgroup *mem;
struct mem_cgroup_stat *stat;
@ -1235,9 +1235,6 @@ void mem_cgroup_update_mapped_file_stat(struct page *page, int val)
int cpu;
struct page_cgroup *pc;
if (!page_is_file_cache(page))
return;
pc = lookup_page_cgroup(page);
if (unlikely(!pc))
return;
@ -1257,7 +1254,7 @@ void mem_cgroup_update_mapped_file_stat(struct page *page, int val)
stat = &mem->stat;
cpustat = &stat->cpustat[cpu];
__mem_cgroup_stat_add_safe(cpustat, MEM_CGROUP_STAT_MAPPED_FILE, val);
__mem_cgroup_stat_add_safe(cpustat, MEM_CGROUP_STAT_FILE_MAPPED, val);
done:
unlock_page_cgroup(pc);
}
@ -1654,18 +1651,18 @@ static int mem_cgroup_move_account(struct page_cgroup *pc,
mem_cgroup_charge_statistics(from, pc, false);
page = pc->page;
if (page_is_file_cache(page) && page_mapped(page)) {
if (page_mapped(page) && !PageAnon(page)) {
cpu = smp_processor_id();
/* Update mapped_file data for mem_cgroup "from" */
stat = &from->stat;
cpustat = &stat->cpustat[cpu];
__mem_cgroup_stat_add_safe(cpustat, MEM_CGROUP_STAT_MAPPED_FILE,
__mem_cgroup_stat_add_safe(cpustat, MEM_CGROUP_STAT_FILE_MAPPED,
-1);
/* Update mapped_file data for mem_cgroup "to" */
stat = &to->stat;
cpustat = &stat->cpustat[cpu];
__mem_cgroup_stat_add_safe(cpustat, MEM_CGROUP_STAT_MAPPED_FILE,
__mem_cgroup_stat_add_safe(cpustat, MEM_CGROUP_STAT_FILE_MAPPED,
1);
}
@ -2889,7 +2886,7 @@ static int mem_cgroup_reset(struct cgroup *cont, unsigned int event)
enum {
MCS_CACHE,
MCS_RSS,
MCS_MAPPED_FILE,
MCS_FILE_MAPPED,
MCS_PGPGIN,
MCS_PGPGOUT,
MCS_SWAP,
@ -2933,8 +2930,8 @@ static int mem_cgroup_get_local_stat(struct mem_cgroup *mem, void *data)
s->stat[MCS_CACHE] += val * PAGE_SIZE;
val = mem_cgroup_read_stat(&mem->stat, MEM_CGROUP_STAT_RSS);
s->stat[MCS_RSS] += val * PAGE_SIZE;
val = mem_cgroup_read_stat(&mem->stat, MEM_CGROUP_STAT_MAPPED_FILE);
s->stat[MCS_MAPPED_FILE] += val * PAGE_SIZE;
val = mem_cgroup_read_stat(&mem->stat, MEM_CGROUP_STAT_FILE_MAPPED);
s->stat[MCS_FILE_MAPPED] += val * PAGE_SIZE;
val = mem_cgroup_read_stat(&mem->stat, MEM_CGROUP_STAT_PGPGIN_COUNT);
s->stat[MCS_PGPGIN] += val;
val = mem_cgroup_read_stat(&mem->stat, MEM_CGROUP_STAT_PGPGOUT_COUNT);

4
mm/rmap.c
View File

@ -721,7 +721,7 @@ void page_add_file_rmap(struct page *page)
{
if (atomic_inc_and_test(&page->_mapcount)) {
__inc_zone_page_state(page, NR_FILE_MAPPED);
mem_cgroup_update_mapped_file_stat(page, 1);
mem_cgroup_update_file_mapped(page, 1);
}
}
@ -753,8 +753,8 @@ void page_remove_rmap(struct page *page)
__dec_zone_page_state(page, NR_ANON_PAGES);
} else {
__dec_zone_page_state(page, NR_FILE_MAPPED);
mem_cgroup_update_file_mapped(page, -1);
}
mem_cgroup_update_mapped_file_stat(page, -1);
/*
* It would be tidy to reset the PageAnon mapping here,
* but that might overwrite a racing page_add_anon_rmap