From: Michel Lespinasse <walken@google.com>
To: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org,
Andrew Morton <akpm@linux-foundation.org>,
Dave Hansen <dave@linux.vnet.ibm.com>,
Rik van Riel <riel@redhat.com>,
Balbir Singh <bsingharora@gmail.com>,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
Andrea Arcangeli <aarcange@redhat.com>,
Johannes Weiner <jweiner@redhat.com>,
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
Hugh Dickins <hughd@google.com>, Michael Wolf <mjwolf@us.ibm.com>
Subject: Re: [PATCH 3/9] kstaled: page_referenced_kstaled() and supporting infrastructure.
Date: Wed, 28 Sep 2011 17:09:32 -0700 [thread overview]
Message-ID: <CANN689GuZHzCa4Xr-YwPrpvy8Fcff4pQLrDQ+a+G_56mvBMwMQ@mail.gmail.com> (raw)
In-Reply-To: <20110928161805.8acb33c5.kamezawa.hiroyu@jp.fujitsu.com>
On Wed, Sep 28, 2011 at 12:18 AM, KAMEZAWA Hiroyuki
<kamezawa.hiroyu@jp.fujitsu.com> wrote:
> 2 questions.
>
> What happens at Transparent HugeTLB pages are splitted/collapsed ?
Nothing special - at the next scan, pages are counted again
considering their new size.
> Does this feature can ignore page migration i.e. flags should not be copied ?
We're not doing it currently. As I understand, the migrate code does
not copy the PTE young bits either, nor does it try to preserve page
order in the LRU lists. So it's not transparent to the LRU algorithms,
but it does not cause incorrect behavior either.
--
Michel "Walken" Lespinasse
A program is never fully debugged until the last user dies.
--
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next prev parent reply other threads:[~2011-09-29 0:09 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-28 0:48 [PATCH 0/9] V2: idle page tracking / working set estimation Michel Lespinasse
2011-09-28 0:48 ` [PATCH 1/9] page_referenced: replace vm_flags parameter with struct page_referenced_info Michel Lespinasse
2011-09-28 6:28 ` KAMEZAWA Hiroyuki
2011-09-28 0:49 ` [PATCH 2/9] kstaled: documentation and config option Michel Lespinasse
2011-09-28 6:53 ` KAMEZAWA Hiroyuki
2011-09-28 23:48 ` Michel Lespinasse
2011-09-29 5:40 ` KAMEZAWA Hiroyuki
2011-09-28 0:49 ` [PATCH 3/9] kstaled: page_referenced_kstaled() and supporting infrastructure Michel Lespinasse
2011-09-28 7:18 ` KAMEZAWA Hiroyuki
2011-09-29 0:09 ` Michel Lespinasse [this message]
2011-09-28 0:49 ` [PATCH 4/9] kstaled: minimalistic implementation Michel Lespinasse
2011-09-28 7:41 ` Peter Zijlstra
2011-09-28 8:01 ` Michel Lespinasse
2011-09-28 10:26 ` Peter Zijlstra
2011-09-28 8:00 ` KAMEZAWA Hiroyuki
2012-02-20 9:17 ` Zhu Yanhai
2011-09-28 0:49 ` [PATCH 5/9] kstaled: skip non-RAM regions Michel Lespinasse
2011-09-28 8:03 ` KAMEZAWA Hiroyuki
2011-09-28 0:49 ` [PATCH 6/9] kstaled: rate limit pages scanned per second Michel Lespinasse
2011-09-28 8:13 ` KAMEZAWA Hiroyuki
2011-09-28 8:19 ` Michel Lespinasse
2011-09-28 8:59 ` KAMEZAWA Hiroyuki
2011-10-14 1:25 ` Michel Lespinasse
2011-10-14 4:54 ` KAMEZAWA Hiroyuki
2011-09-28 0:49 ` [PATCH 7/9] kstaled: add histogram sampling functionality Michel Lespinasse
2011-09-28 8:22 ` KAMEZAWA Hiroyuki
2011-09-28 0:49 ` [PATCH 8/9] kstaled: add incrementally updating stale page count Michel Lespinasse
2011-09-28 0:49 ` [PATCH 9/9] kstaled: export PG_stale in /proc/kpageflags Michel Lespinasse
2011-09-29 16:43 ` [PATCH 0/9] V2: idle page tracking / working set estimation Eric B Munson
2011-09-29 20:25 ` Michel Lespinasse
2011-09-29 21:18 ` Eric B Munson
2011-09-30 18:19 ` Eric B Munson
2011-09-30 21:16 ` Michel Lespinasse
2011-09-30 21:40 ` Eric B Munson
2011-10-03 15:06 ` Eric B Munson
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