From: Pavel Emelyanov <xemul@parallels.com>
To: Cyrill Gorcunov <gorcunov@gmail.com>, akpm@linux-foundation.org
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org,
luto@amacapital.net, gorcunov@openvz.org, mpm@selenic.com,
xiaoguangrong@linux.vnet.ibm.com, mtosatti@redhat.com,
kosaki.motohiro@gmail.com, sfr@canb.auug.org.au,
peterz@infradead.org, aneesh.kumar@linux.vnet.ibm.com
Subject: Re: [patch 2/2] [PATCH] mm: Save soft-dirty bits on file pages
Date: Wed, 31 Jul 2013 12:16:52 +0400 [thread overview]
Message-ID: <51F8C7F4.9020504@parallels.com> (raw)
In-Reply-To: <20130730204654.966378702@gmail.com>
On 07/31/2013 12:41 AM, Cyrill Gorcunov wrote:
> Andy reported that if file page get reclaimed we loose soft-dirty bit
> if it was there, so save _PAGE_BIT_SOFT_DIRTY bit when page address
> get encoded into pte entry. Thus when #pf happens on such non-present
> pte we can restore it back.
>
> Reported-by: Andy Lutomirski <luto@amacapital.net>
> Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Acked-by: Pavel Emelyanov <xemul@parallels.com>
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WARNING: multiple messages have this Message-ID (diff)
From: Pavel Emelyanov <xemul@parallels.com>
To: Cyrill Gorcunov <gorcunov@gmail.com>, <akpm@linux-foundation.org>
Cc: <linux-mm@kvack.org>, <linux-kernel@vger.kernel.org>,
<luto@amacapital.net>, <gorcunov@openvz.org>, <mpm@selenic.com>,
<xiaoguangrong@linux.vnet.ibm.com>, <mtosatti@redhat.com>,
<kosaki.motohiro@gmail.com>, <sfr@canb.auug.org.au>,
<peterz@infradead.org>, <aneesh.kumar@linux.vnet.ibm.com>
Subject: Re: [patch 2/2] [PATCH] mm: Save soft-dirty bits on file pages
Date: Wed, 31 Jul 2013 12:16:52 +0400 [thread overview]
Message-ID: <51F8C7F4.9020504@parallels.com> (raw)
In-Reply-To: <20130730204654.966378702@gmail.com>
On 07/31/2013 12:41 AM, Cyrill Gorcunov wrote:
> Andy reported that if file page get reclaimed we loose soft-dirty bit
> if it was there, so save _PAGE_BIT_SOFT_DIRTY bit when page address
> get encoded into pte entry. Thus when #pf happens on such non-present
> pte we can restore it back.
>
> Reported-by: Andy Lutomirski <luto@amacapital.net>
> Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Acked-by: Pavel Emelyanov <xemul@parallels.com>
next prev parent reply other threads:[~2013-07-31 8:17 UTC|newest]
Thread overview: 61+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-30 20:41 [patch 0/2] Soft-dirty page tracker improvemens Cyrill Gorcunov
2013-07-30 20:41 ` Cyrill Gorcunov
2013-07-30 20:41 ` [patch 1/2] [PATCH] mm: Save soft-dirty bits on swapped pages Cyrill Gorcunov
2013-07-30 20:41 ` Cyrill Gorcunov
2013-07-31 8:16 ` Pavel Emelyanov
2013-07-31 8:16 ` Pavel Emelyanov
2013-08-01 0:51 ` Minchan Kim
2013-08-01 0:51 ` Minchan Kim
2013-08-01 5:53 ` Cyrill Gorcunov
2013-08-01 5:53 ` Cyrill Gorcunov
2013-08-01 6:16 ` Minchan Kim
2013-08-01 6:16 ` Minchan Kim
2013-08-01 6:28 ` Cyrill Gorcunov
2013-08-01 6:28 ` Cyrill Gorcunov
2013-08-01 6:37 ` Minchan Kim
2013-08-01 6:37 ` Minchan Kim
2013-08-01 6:38 ` Cyrill Gorcunov
2013-08-01 6:38 ` Cyrill Gorcunov
2013-08-05 1:48 ` Wanpeng Li
2013-08-05 1:48 ` Wanpeng Li
[not found] ` <51ff047d.2768310a.2fc4.340fSMTPIN_ADDED_BROKEN@mx.google.com>
2013-08-05 2:17 ` Minchan Kim
2013-08-05 2:17 ` Minchan Kim
2013-08-05 2:38 ` Wanpeng Li
2013-08-05 2:38 ` Wanpeng Li
[not found] ` <51ff1053.ab47310a.5d3f.566cSMTPIN_ADDED_BROKEN@mx.google.com>
2013-08-05 2:54 ` Minchan Kim
2013-08-05 2:54 ` Minchan Kim
2013-08-05 2:58 ` Wanpeng Li
2013-08-05 2:58 ` Wanpeng Li
[not found] ` <51ff14e9.87ef440a.1424.ffffe470SMTPIN_ADDED_BROKEN@mx.google.com>
2013-08-05 5:43 ` Cyrill Gorcunov
2013-08-05 5:43 ` Cyrill Gorcunov
2013-08-07 20:21 ` Andrew Morton
2013-08-07 20:21 ` Andrew Morton
2013-08-07 20:29 ` Cyrill Gorcunov
2013-08-07 20:29 ` Cyrill Gorcunov
2013-08-10 17:48 ` James Bottomley
2013-08-10 17:48 ` James Bottomley
2013-07-30 20:41 ` [patch 2/2] [PATCH] mm: Save soft-dirty bits on file pages Cyrill Gorcunov
2013-07-30 20:41 ` Cyrill Gorcunov
2013-07-31 8:16 ` Pavel Emelyanov [this message]
2013-07-31 8:16 ` Pavel Emelyanov
2013-08-07 20:28 ` Andrew Morton
2013-08-07 20:28 ` Andrew Morton
2013-08-07 20:31 ` Cyrill Gorcunov
2013-08-07 20:31 ` Cyrill Gorcunov
2013-08-08 14:51 ` Cyrill Gorcunov
2013-08-12 21:57 ` Andrew Morton
2013-08-12 21:57 ` Andrew Morton
2013-08-12 22:28 ` Andy Lutomirski
2013-08-12 22:28 ` Andy Lutomirski
2013-08-12 22:37 ` Andrew Morton
2013-08-12 22:37 ` Andrew Morton
2013-08-13 5:02 ` Cyrill Gorcunov
2013-08-13 5:02 ` Cyrill Gorcunov
2013-08-13 15:14 ` H. Peter Anvin
2013-08-13 15:14 ` H. Peter Anvin
2013-08-13 15:37 ` Cyrill Gorcunov
2013-08-13 15:37 ` Cyrill Gorcunov
2013-08-13 16:43 ` H. Peter Anvin
2013-08-13 16:43 ` H. Peter Anvin
2013-08-13 21:28 ` Cyrill Gorcunov
2013-08-13 21:28 ` Cyrill Gorcunov
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