Re: [PATCH] pagemap: fix wrong KPF_THP on slab pages

[KOSAKI Motohiro]

On Tue, Sep 25, 2012 at 9:56 AM, Naoya Horiguchi
<n-horiguchi@xxxxxxxxxxxxx> 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.

Indeed. Please add some comment too.
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