From: Mel Gorman <mgorman@suse.de>
To: Will Huck <will.huckk@gmail.com>
Cc: Alexey Lyahkov <alexey.lyashkov@gmail.com>,
Andrew Perepechko <anserper@ya.ru>,
Robin Dong <sanbai@taobao.com>, Theodore Tso <tytso@mit.edu>,
Andrew Morton <akpm@linux-foundation.org>,
Hugh Dickins <hughd@google.com>, Rik van Riel <riel@redhat.com>,
Johannes Weiner <hannes@cmpxchg.org>,
Bernd Schubert <bernd.schubert@fastmail.fm>,
David Howells <dhowells@redhat.com>,
Trond Myklebust <Trond.Myklebust@netapp.com>,
Linux-fsdevel <linux-fsdevel@vger.kernel.org>,
Linux-ext4 <linux-ext4@vger.kernel.org>,
LKML <linux-kernel@vger.kernel.org>,
Linux-mm <linux-mm@kvack.org>
Subject: Re: [RFC PATCH 0/3] Obey mark_page_accessed hint given by filesystems
Date: Wed, 1 May 2013 09:08:19 +0100 [thread overview]
Message-ID: <20130501080819.GF11497@suse.de> (raw)
In-Reply-To: <5180B601.8080005@gmail.com>
On Wed, May 01, 2013 at 02:28:17PM +0800, Will Huck wrote:
> Hi Mel,
> On 04/30/2013 12:31 AM, Mel Gorman wrote:
> >Andrew Perepechko reported a problem whereby pages are being prematurely
> >evicted as the mark_page_accessed() hint is ignored for pages that are
> >currently on a pagevec -- http://www.spinics.net/lists/linux-ext4/msg37340.html .
> >Alexey Lyahkov and Robin Dong have also reported problems recently that
> >could be due to hot pages reaching the end of the inactive list too quickly
> >and be reclaimed.
>
> Both shrink_active_list and shrink_inactive_list can call
> lru_add_drain(), why the hot pages can't be mark Actived during this
> time?
>
Because by then it's not known that the filesystem had called
mark_page_accessed() to indicate the page should be activated.
--
Mel Gorman
SUSE Labs
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WARNING: multiple messages have this Message-ID (diff)
From: Mel Gorman <mgorman@suse.de>
To: Will Huck <will.huckk@gmail.com>
Cc: Alexey Lyahkov <alexey.lyashkov@gmail.com>,
Andrew Perepechko <anserper@ya.ru>,
Robin Dong <sanbai@taobao.com>, Theodore Tso <tytso@mit.edu>,
Andrew Morton <akpm@linux-foundation.org>,
Hugh Dickins <hughd@google.com>, Rik van Riel <riel@redhat.com>,
Johannes Weiner <hannes@cmpxchg.org>,
Bernd Schubert <bernd.schubert@fastmail.fm>,
David Howells <dhowells@redhat.com>,
Trond Myklebust <Trond.Myklebust@netapp.com>,
Linux-fsdevel <linux-fsdevel@vger.kernel.org>,
Linux-ext4 <linux-ext4@vger.kernel.org>,
LKML <linux-kernel@vger.kernel.org>,
Linux-mm <linux-mm@kvack.org>
Subject: Re: [RFC PATCH 0/3] Obey mark_page_accessed hint given by filesystems
Date: Wed, 1 May 2013 09:08:19 +0100 [thread overview]
Message-ID: <20130501080819.GF11497@suse.de> (raw)
In-Reply-To: <5180B601.8080005@gmail.com>
On Wed, May 01, 2013 at 02:28:17PM +0800, Will Huck wrote:
> Hi Mel,
> On 04/30/2013 12:31 AM, Mel Gorman wrote:
> >Andrew Perepechko reported a problem whereby pages are being prematurely
> >evicted as the mark_page_accessed() hint is ignored for pages that are
> >currently on a pagevec -- http://www.spinics.net/lists/linux-ext4/msg37340.html .
> >Alexey Lyahkov and Robin Dong have also reported problems recently that
> >could be due to hot pages reaching the end of the inactive list too quickly
> >and be reclaimed.
>
> Both shrink_active_list and shrink_inactive_list can call
> lru_add_drain(), why the hot pages can't be mark Actived during this
> time?
>
Because by then it's not known that the filesystem had called
mark_page_accessed() to indicate the page should be activated.
--
Mel Gorman
SUSE Labs
next prev parent reply other threads:[~2013-05-01 8:08 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-04-29 16:31 [RFC PATCH 0/3] Obey mark_page_accessed hint given by filesystems Mel Gorman
2013-04-29 16:31 ` Mel Gorman
2013-04-29 16:31 ` [PATCH 1/3] mm: pagevec: Defer deciding what LRU to add a page to until pagevec drain time Mel Gorman
2013-04-29 16:31 ` Mel Gorman
2013-04-29 16:50 ` Rik van Riel
2013-04-29 16:50 ` Rik van Riel
2013-05-03 7:51 ` Jan Kara
2013-05-03 7:51 ` Jan Kara
2013-05-03 8:37 ` Mel Gorman
2013-05-03 8:37 ` Mel Gorman
2013-04-29 16:31 ` [PATCH 2/3] mm: Ensure that mark_page_accessed moves pages to the active list Mel Gorman
2013-04-29 16:31 ` Mel Gorman
2013-04-29 17:12 ` Rik van Riel
2013-04-29 17:12 ` Rik van Riel
2013-04-29 21:53 ` Mel Gorman
2013-04-29 21:53 ` Mel Gorman
2013-05-01 5:41 ` Sam Ben
2013-05-01 5:41 ` Sam Ben
2013-05-01 8:06 ` Mel Gorman
2013-05-01 8:06 ` Mel Gorman
2013-05-01 8:14 ` Ric Mason
2013-05-01 8:14 ` Ric Mason
2013-05-01 8:31 ` Mel Gorman
2013-05-01 8:31 ` Mel Gorman
2013-04-29 16:31 ` [PATCH 3/3] mm: Remove lru parameter from __pagevec_lru_add and remove parts of pagevec API Mel Gorman
2013-04-29 16:31 ` Mel Gorman
2013-05-03 8:00 ` Jan Kara
2013-05-03 8:00 ` Jan Kara
2013-05-01 6:28 ` [RFC PATCH 0/3] Obey mark_page_accessed hint given by filesystems Will Huck
2013-05-01 6:28 ` Will Huck
2013-05-01 8:08 ` Mel Gorman [this message]
2013-05-01 8:08 ` Mel Gorman
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