Re: [RFC][PATCH -mm 6/7] memcg: make-mapping-null-before-calling-uncharge.patch
- From: Daisuke Nishimura <nishimura@xxxxxxxxxxxxxxxxx>
- Date: Fri, 22 Aug 2008 13:57:43 +0900
@@ -379,6 +377,15 @@ static void migrate_page_copy(struct pagYou forget to remove this line :)
ClearPagePrivate(page);
set_page_private(page, 0);
page->mapping = NULL;
Thanks,
Daisuke Nishimura.
+ /* page->mapping contains a flag for PageAnon() */--
+ if (PageAnon(page)) {
+ /* This page is uncharged at try_to_unmap(). */
+ page->mapping = NULL;
+ } else {
+ /* Obsolete file cache should be uncharged */
+ page->mapping = NULL;
+ mem_cgroup_uncharge_cache_page(page);
+ }
/*
* If any waiters have accumulated on the new page then
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