Messages in this thread |  | | | Date | Wed, 8 Jun 2011 11:38:27 +0200 | | From | Michal Hocko <> | | Subject | Re: [PATCH 2/4] mm: vmscan: Do not use page_count without a page pin |
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On Tue 07-06-11 16:07:03, Mel Gorman wrote: > From: Andrea Arcangeli <aarcange@redhat.com> > > From: Andrea Arcangeli <aarcange@redhat.com> > > It is unsafe to run page_count during the physical pfn scan because > compound_head could trip on a dangling pointer when reading > page->first_page if the compound page is being freed by another CPU. > > [mgorman@suse.de: Split out patch] > Signed-off-by: Andrea Arcangeli <aarcange@redhat.com> > Signed-off-by: Mel Gorman <mgorman@suse.de>
Reviewed-by: Michal Hocko <mhocko@suse.cz> -- Michal Hocko SUSE Labs SUSE LINUX s.r.o. Lihovarska 1060/12 190 00 Praha 9 Czech Republic
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