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From: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
To: Hillf Danton <dhillf@gmail.com>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>,
	linux-mm@kvack.org, Andrew Morton <akpm@linux-foundation.org>,
	David Rientjes <rientjes@google.com>,
	Andi Kleen <andi@firstfloor.org>,
	Wu Fengguang <fengguang.wu@intel.com>,
	Andrea Arcangeli <aarcange@redhat.com>,
	KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
	LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 1/6] pagemap: avoid splitting thp when reading /proc/pid/pagemap
Date: Mon, 30 Jan 2012 14:23:52 -0500	[thread overview]
Message-ID: <1327951432-29110-1-git-send-email-n-horiguchi@ah.jp.nec.com> (raw)
In-Reply-To: <CAJd=RBDLEWuAKmRcaUJXuz=h9_3kaexbdGyqv7KXn+dmMeUvCQ@mail.gmail.com>

On Sun, Jan 29, 2012 at 09:17:32PM +0800, Hillf Danton wrote:
> Hi Naoya
> 
> On Sat, Jan 28, 2012 at 7:02 AM, Naoya Horiguchi
> <n-horiguchi@ah.jp.nec.com> wrote:
> > Thp split is not necessary if we explicitly check whether pmds are
> > mapping thps or not. This patch introduces this check and adds code
> > to generate pagemap entries for pmds mapping thps, which results in
> > less performance impact of pagemap on thp.
> >
> 
> Could the method proposed here cover the two cases of split THP in mem cgroup?

No for now, but yes if "move charge" function supports THP.
I think this can be a bit large step so it is the next work.

Thanks,
Naoya

  reply	other threads:[~2012-01-30 19:22 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-01-27 23:02 [PATCH 0/6 v4] pagemap handles transparent hugepage Naoya Horiguchi
2012-01-27 23:02 ` [PATCH 1/6] pagemap: avoid splitting thp when reading /proc/pid/pagemap Naoya Horiguchi
2012-01-29 13:17   ` Hillf Danton
2012-01-30 19:23     ` Naoya Horiguchi [this message]
2012-01-27 23:02 ` [PATCH 2/6] thp: optimize away unnecessary page table locking Naoya Horiguchi
2012-01-28 11:23   ` Hillf Danton
2012-01-28 22:33     ` Naoya Horiguchi
2012-01-30  6:22   ` KAMEZAWA Hiroyuki
2012-02-02  5:27     ` Naoya Horiguchi
2012-02-02  8:32       ` KAMEZAWA Hiroyuki
2012-01-27 23:02 ` [PATCH 3/6] pagemap: export KPF_THP Naoya Horiguchi
2012-01-27 23:02 ` [PATCH 4/6] pagemap: document KPF_THP and make page-types aware of it Naoya Horiguchi
2012-01-27 23:02 ` [PATCH 5/6] introduce thp_ptep_get() Naoya Horiguchi
2012-01-30  6:26   ` KAMEZAWA Hiroyuki
2012-01-30 19:24     ` Naoya Horiguchi
2012-01-27 23:02 ` [PATCH 6/6] pagemap: introduce data structure for pagemap entry Naoya Horiguchi
2012-01-30  6:31   ` KAMEZAWA Hiroyuki
2012-01-30 19:27     ` Naoya Horiguchi
  -- strict thread matches above, loose matches on Subject: below --
2012-02-08 15:51 [PATCH 0/6 v5] pagemap handles transparent hugepage Naoya Horiguchi
2012-02-08 15:51 ` [PATCH 1/6] pagemap: avoid splitting thp when reading /proc/pid/pagemap Naoya Horiguchi
2012-01-16 17:18 Naoya Horiguchi
2012-01-12 19:34 [PATCH 0/6 v3] pagemap handles transparent hugepage Naoya Horiguchi
2012-01-12 19:34 ` [PATCH 1/6] pagemap: avoid splitting thp when reading /proc/pid/pagemap Naoya Horiguchi
2012-01-14 17:00   ` Andrea Arcangeli
2012-01-15 12:06     ` Andrea Arcangeli
2012-01-16 17:18       ` Naoya Horiguchi

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