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memcg: more mem_cgroup_uncharge() batching 

It seems odd that truncate_inode_pages_range(), called not only when
truncating but also when evicting inodes, has mem_cgroup_uncharge_start
and _end() batching in its second loop to clear up a few leftovers, but
not in its first loop that does almost all the work: add them there too.

Signed-off-by: Hugh Dickins <hughd@google.com>
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Acked-by: Balbir Singh <balbir@linux.vnet.ibm.com>
Acked-by: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Hugh Dickins 2011-02-25 14:44:29 -08:00 committed by Linus Torvalds
parent 8eac563c1c
commit e5598f8bf5
1 changed files with 2 additions and 0 deletions
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2
mm/truncate.c
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@ -225,6 +225,7 @@ void truncate_inode_pages_range(struct address_space *mapping,
next = start;
while (next <= end &&
pagevec_lookup(&pvec, mapping, next, PAGEVEC_SIZE)) {
mem_cgroup_uncharge_start();
for (i = 0; i < pagevec_count(&pvec); i++) {
struct page *page = pvec.pages[i];
pgoff_t page_index = page->index;
@ -247,6 +248,7 @@ void truncate_inode_pages_range(struct address_space *mapping,
unlock_page(page);
}
pagevec_release(&pvec);
mem_cgroup_uncharge_end();
cond_resched();
}