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From: Andrea Arcangeli <aarcange@redhat.com>
To: Youquan Song <youquan.song@intel.com>
Cc: linux-kernel@vger.kernel.org, akpm@linux-foundation.org,
	wli@holomorphy.com, david.woodhouse@intel.com,
	allen.m.kay@intel.com, mtosatti@redhat.com, chrisw@redhat.com,
	andi@firstfloor.org, chaohong.guo@intel.com,
	Youquan Song <youquan.song@linux.intel.com>
Subject: Re: [PATCH 1/2] thp: Add compound tail page _mapcount when mapped
Date: Fri, 25 Nov 2011 14:12:41 +0100	[thread overview]
Message-ID: <20111125131241.GZ8397@redhat.com> (raw)
In-Reply-To: <1322200030-26350-1-git-send-email-youquan.song@intel.com>

Both are needed to take care of CONFIG_DEBUG_VM false positives. Worst
case a false positive hits, but if it doesn't there was no risk because
the tail page refcounting isn't actively used by that code and the
refcounting on the head page was done right already.

Thanks,
Andrea

  parent reply	other threads:[~2011-11-25 13:17 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-11-25  5:47 [PATCH 1/2] thp: Add compound tail page _mapcount when mapped Youquan Song
2011-11-25  5:47 ` [PATCH 2/2] thp: Set compound tail page _count to zero Youquan Song
2011-11-25 13:12 ` Andrea Arcangeli [this message]
2011-11-29  0:16 ` [PATCH 1/2] thp: Add compound tail page _mapcount when mapped Andrew Morton
2011-11-29  0:19   ` Andi Kleen
2011-11-29  0:58     ` Andrea Arcangeli
2011-11-29 18:00       ` Youquan Song
  -- strict thread matches above, loose matches on Subject: below --
2011-11-26  3:23 Youquan Song

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