From: David Rientjes <rientjes@google.com>
To: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
Wu Fengguang <fengguang.wu@intel.com>,
Andrew Morton <akpm@linux-foundation.org>,
Andi Kleen <andi.kleen@intel.com>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] pagemap: fix wrong KPF_THP on slab pages
Date: Tue, 25 Sep 2012 19:26:39 -0700 (PDT) [thread overview]
Message-ID: <alpine.DEB.2.00.1209251926200.25890@chino.kir.corp.google.com> (raw)
In-Reply-To: <1348625168-28983-1-git-send-email-n-horiguchi@ah.jp.nec.com>
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 <n-horiguchi@ah.jp.nec.com>
Acked-by: David Rientjes <rientjes@google.com>
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next prev parent reply other threads:[~2012-09-26 2:26 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-25 13:56 Naoya Horiguchi
2012-09-25 15:59 ` KOSAKI Motohiro
2012-09-25 17:05 ` Naoya Horiguchi
2012-09-25 19:03 ` KOSAKI Motohiro
2012-09-26 0:20 ` David Rientjes
2012-09-26 2:06 ` Naoya Horiguchi
2012-09-26 2:26 ` David Rientjes [this message]
2012-09-26 2:47 ` Fengguang Wu
2012-09-26 4:02 ` Naoya Horiguchi
2012-09-26 6:06 ` Naoya Horiguchi
2012-09-26 7:38 ` Fengguang Wu
2012-09-26 14:42 ` Naoya Horiguchi
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