From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx115.postini.com [74.125.245.115]) by kanga.kvack.org (Postfix) with SMTP id 315D86B002B for ; Tue, 25 Sep 2012 22:26:42 -0400 (EDT) Received: by pbbrq2 with SMTP id rq2so1230395pbb.14 for ; Tue, 25 Sep 2012 19:26:41 -0700 (PDT) Date: Tue, 25 Sep 2012 19:26:39 -0700 (PDT) From: David Rientjes Subject: Re: [PATCH] pagemap: fix wrong KPF_THP on slab pages In-Reply-To: <1348625168-28983-1-git-send-email-n-horiguchi@ah.jp.nec.com> Message-ID: References: <1348625168-28983-1-git-send-email-n-horiguchi@ah.jp.nec.com> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org List-ID: To: Naoya Horiguchi Cc: KOSAKI Motohiro , Wu Fengguang , Andrew Morton , Andi Kleen , linux-mm@kvack.org, linux-kernel@vger.kernel.org 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 Acked-by: David Rientjes -- 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: email@kvack.org