Messages in this thread | | | Date | Wed, 23 Jul 2014 17:19:09 +0200 | From | Michal Hocko <> | Subject | Re: [patch 13/13] mm: memcontrol: rewrite uncharge API |
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On Wed 23-07-14 11:06:08, Johannes Weiner wrote: > On Wed, Jul 23, 2014 at 04:38:47PM +0200, Michal Hocko wrote: [...] > > OK, thanks for the clarification. I had this feeling but couldn't wrap > > my head around the indirection of the code. > > > > It seems that checkig PageCgroupUsed(new) and bail out early in > > mem_cgroup_migrate should just work, no? > > If the new page is already charged as page cache, we could just drop > the call to mem_cgroup_migrate() altogether.
Yeah, it is just that we do not want to do all the page->page_cgroup->PageCgroupUsed thing in replace_page_cache_page.
-- Michal Hocko SUSE Labs
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