Re: [PATCH] pagemap: fix wrong KPF_THP on slab pages
From: KOSAKI Motohiro <hidden>
Date: 2012-09-25 16:00:14
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On Tue, Sep 25, 2012 at 9:56 AM, Naoya Horiguchi [off-list ref] wrote:
KPF_THP can be set on non-huge compound pages like slab pages, because PageTransCompound only sees PG_head and PG_tail. Obviously this is a bug and breaks user space applications which look for thp via /proc/kpageflags. Currently thp is constructed only on anonymous pages, so this patch makes KPF_THP be set when both of PageAnon and PageTransCompound are true.
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