From: Rik van Riel <riel@redhat.com>
To: Minchan Kim <minchan.kim@gmail.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
Ying Han <yinghan@google.com>,
Andrew Morton <akpm@linux-foundation.org>,
linux-mm <linux-mm@kvack.org>,
LKML <linux-kernel@vger.kernel.org>,
Venkatesh Pallipadi <venki@google.com>,
Johannes Weiner <hannes@cmpxchg.org>
Subject: Re: [PATCH] vmscan: prevent background aging of anon page in no swap system
Date: Mon, 30 Aug 2010 22:30:49 -0400 [thread overview]
Message-ID: <4C7C6959.3030801@redhat.com> (raw)
In-Reply-To: <AANLkTin4-NomOoNFYCKgi7oE+MCUiC0o0ftAkOwLKez_@mail.gmail.com>
On 08/30/2010 09:23 PM, Minchan Kim wrote:
> Ying's one and mine both has a same effect.
> Only difference happens swap is full. My version maintains old
> behavior but Ying's one changes the behavior. I admit swap full is
> rare event but I hoped not changed old behavior if we doesn't find any
> problem.
> If kswapd does aging when swap full happens, is it a problem?
It may be a good thing, since swap will often be freed again
(when something is swapped in, or exits).
Having some more anonymous pages sit on the inactive list
gives them a chance to get used again, potentially giving
us a better chance of preserving the working set when swap
is full or near full a lot of the time.
--
All rights reversed
WARNING: multiple messages have this Message-ID (diff)
From: Rik van Riel <riel@redhat.com>
To: Minchan Kim <minchan.kim@gmail.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
Ying Han <yinghan@google.com>,
Andrew Morton <akpm@linux-foundation.org>,
linux-mm <linux-mm@kvack.org>,
LKML <linux-kernel@vger.kernel.org>,
Venkatesh Pallipadi <venki@google.com>,
Johannes Weiner <hannes@cmpxchg.org>
Subject: Re: [PATCH] vmscan: prevent background aging of anon page in no swap system
Date: Mon, 30 Aug 2010 22:30:49 -0400 [thread overview]
Message-ID: <4C7C6959.3030801@redhat.com> (raw)
In-Reply-To: <AANLkTin4-NomOoNFYCKgi7oE+MCUiC0o0ftAkOwLKez_@mail.gmail.com>
On 08/30/2010 09:23 PM, Minchan Kim wrote:
> Ying's one and mine both has a same effect.
> Only difference happens swap is full. My version maintains old
> behavior but Ying's one changes the behavior. I admit swap full is
> rare event but I hoped not changed old behavior if we doesn't find any
> problem.
> If kswapd does aging when swap full happens, is it a problem?
It may be a good thing, since swap will often be freed again
(when something is swapped in, or exits).
Having some more anonymous pages sit on the inactive list
gives them a chance to get used again, potentially giving
us a better chance of preserving the working set when swap
is full or near full a lot of the time.
--
All rights reversed
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
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next prev parent reply other threads:[~2010-08-31 2:31 UTC|newest]
Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-08-29 15:43 [PATCH] vmscan: prevent background aging of anon page in no swap system Minchan Kim
2010-08-29 15:43 ` Minchan Kim
2010-08-29 15:49 ` Rik van Riel
2010-08-29 15:49 ` Rik van Riel
2010-08-29 17:45 ` Ying Han
2010-08-29 17:45 ` Ying Han
2010-08-29 20:03 ` Rik van Riel
2010-08-29 20:03 ` Rik van Riel
2010-08-29 20:56 ` Ying Han
2010-08-29 21:23 ` Ying Han
2010-08-29 21:23 ` Ying Han
2010-08-29 22:26 ` Rik van Riel
2010-08-29 22:26 ` Rik van Riel
2010-08-30 0:18 ` Minchan Kim
2010-08-30 0:18 ` Minchan Kim
2010-08-30 5:40 ` Ying Han
2010-08-30 5:40 ` Ying Han
2010-08-30 6:16 ` Minchan Kim
2010-08-30 6:16 ` Minchan Kim
2010-08-31 0:56 ` KOSAKI Motohiro
2010-08-31 0:56 ` KOSAKI Motohiro
2010-08-31 1:10 ` Minchan Kim
2010-08-31 1:10 ` Minchan Kim
2010-08-31 1:18 ` KOSAKI Motohiro
2010-08-31 1:18 ` KOSAKI Motohiro
2010-08-31 1:36 ` Minchan Kim
2010-08-31 1:36 ` Minchan Kim
2010-08-31 1:41 ` KOSAKI Motohiro
2010-08-31 1:41 ` KOSAKI Motohiro
2010-08-31 0:56 ` KOSAKI Motohiro
2010-08-31 0:56 ` KOSAKI Motohiro
2010-08-31 1:23 ` Minchan Kim
2010-08-31 1:23 ` Minchan Kim
2010-08-31 1:38 ` KOSAKI Motohiro
2010-08-31 1:38 ` KOSAKI Motohiro
2010-08-31 2:02 ` Minchan Kim
2010-08-31 2:02 ` Minchan Kim
2010-08-31 2:09 ` KOSAKI Motohiro
2010-08-31 2:09 ` KOSAKI Motohiro
2010-08-31 3:47 ` Minchan Kim
2010-08-31 3:47 ` Minchan Kim
2010-08-31 2:30 ` Rik van Riel [this message]
2010-08-31 2:30 ` Rik van Riel
2010-08-31 3:46 ` Minchan Kim
2010-08-31 3:46 ` Minchan Kim
2010-09-03 21:06 ` Andrew Morton
2010-09-03 21:06 ` Andrew Morton
2010-09-03 21:23 ` Rik van Riel
2010-09-03 21:23 ` Rik van Riel
2010-09-03 21:45 ` Ying Han
2010-09-03 21:47 ` Ying Han
2010-09-03 21:47 ` Ying Han
2010-09-03 21:56 ` Andrew Morton
2010-09-03 21:56 ` Andrew Morton
2010-09-04 1:12 ` Venkatesh Pallipadi
2010-09-04 1:12 ` Venkatesh Pallipadi
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