Messages in this thread | | | Date | Tue, 15 Jun 2010 20:29:49 -0400 | From | Rik van Riel <> | Subject | Re: [PATCH 12/12] vmscan: Do not writeback pages in direct reclaim |
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On 06/15/2010 08:17 PM, KAMEZAWA Hiroyuki wrote: > On Tue, 15 Jun 2010 15:16:01 +0100 > Mel Gorman<mel@csn.ul.ie> wrote:
>> But in turn, where is mem_cgroup_hierarchical_reclaim called from direct >> reclaim? It appears to be only called from the fault path or as a result >> of the memcg changing size. >> > yes. It's only called from > - page fault > - add_to_page_cache() > > I think we'll see no stack problem. Now, memcg doesn't wakeup kswapd for > reclaiming memory, it needs direct writeback.
Of course, a memcg page fault could still be triggered from copy_to_user or copy_from_user, with a fairly arbitrary stack frame above...
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