Re: [PATCH] pagemap: fix wrong KPF_THP on slab pages
From: David Rientjes <rientjes@google.com>
Date: 2012-09-26 02:26:43
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On Tue, 25 Sep 2012, Naoya Horiguchi 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. This patch rules out setting KPF_THP wrongly by additional PageSlab check. Changelog in v3: - check PageSlab instead of PageAnon - fix patch subject Changelog in v2: - add a comment in code Signed-off-by: Naoya Horiguchi <redacted>
Acked-by: David Rientjes <rientjes@google.com> -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>