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memcg: modify accounting function for supporting THP better 

mem_cgroup_charge_statisics() was designed for charging a page but now, we
have transparent hugepage.  To fix problems (in following patch) it's
required to change the function to get the number of pages as its
arguments.

The new function gets following as argument.
  - type of page rather than 'pc'
  - size of page which is accounted.

Signed-off-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>
Cc: Johannes Weiner <hannes@cmpxchg.org>
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 2011-01-20 14:44:23 -08:00 committed by Linus Torvalds
parent 20d9600cb4
commit e401f1761c
1 changed files with 12 additions and 13 deletions
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25
mm/memcontrol.c
View File

@ -600,23 +600,22 @@ static void mem_cgroup_swap_statistics(struct mem_cgroup *mem,
}
static void mem_cgroup_charge_statistics(struct mem_cgroup *mem,
struct page_cgroup *pc,
bool charge)
bool file, int nr_pages)
{
int val = (charge) ? 1 : -1;
preempt_disable();
if (PageCgroupCache(pc))
__this_cpu_add(mem->stat->count[MEM_CGROUP_STAT_CACHE], val);
if (file)
__this_cpu_add(mem->stat->count[MEM_CGROUP_STAT_CACHE], nr_pages);
else
__this_cpu_add(mem->stat->count[MEM_CGROUP_STAT_RSS], val);
__this_cpu_add(mem->stat->count[MEM_CGROUP_STAT_RSS], nr_pages);
if (charge)
/* pagein of a big page is an event. So, ignore page size */
if (nr_pages > 0)
__this_cpu_inc(mem->stat->count[MEM_CGROUP_STAT_PGPGIN_COUNT]);
else
__this_cpu_inc(mem->stat->count[MEM_CGROUP_STAT_PGPGOUT_COUNT]);
__this_cpu_inc(mem->stat->count[MEM_CGROUP_EVENTS]);
__this_cpu_add(mem->stat->count[MEM_CGROUP_EVENTS], nr_pages);
preempt_enable();
}
@ -2115,7 +2114,7 @@ static void ____mem_cgroup_commit_charge(struct mem_cgroup *mem,
break;
}
mem_cgroup_charge_statistics(mem, pc, true);
mem_cgroup_charge_statistics(mem, PageCgroupCache(pc), 1);
}
static void __mem_cgroup_commit_charge(struct mem_cgroup *mem,
@ -2186,14 +2185,14 @@ static void __mem_cgroup_move_account(struct page_cgroup *pc,
__this_cpu_inc(to->stat->count[MEM_CGROUP_STAT_FILE_MAPPED]);
preempt_enable();
}
mem_cgroup_charge_statistics(from, pc, false);
mem_cgroup_charge_statistics(from, PageCgroupCache(pc), -1);
if (uncharge)
/* This is not "cancel", but cancel_charge does all we need. */
mem_cgroup_cancel_charge(from, PAGE_SIZE);
/* caller should have done css_get */
pc->mem_cgroup = to;
mem_cgroup_charge_statistics(to, pc, true);
mem_cgroup_charge_statistics(to, PageCgroupCache(pc), 1);
/*
* We charges against "to" which may not have any tasks. Then, "to"
* can be under rmdir(). But in current implementation, caller of
@ -2597,7 +2596,7 @@ __mem_cgroup_uncharge_common(struct page *page, enum charge_type ctype)
}
for (i = 0; i < count; i++)
mem_cgroup_charge_statistics(mem, pc + i, false);
mem_cgroup_charge_statistics(mem, PageCgroupCache(pc), -1);
ClearPageCgroupUsed(pc);
/*