From: Seth Jennings <sjenning@linux.vnet.ibm.com>
To: Lord Glauber Costa of Sealand <glommer@parallels.com>
Cc: Rik van Riel <riel@redhat.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Andrew Morton <akpm@linux-foundation.org>,
Nitin Gupta <ngupta@vflare.org>, Minchan Kim <minchan@kernel.org>,
Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>,
Dan Magenheimer <dan.magenheimer@oracle.com>,
Robert Jennings <rcj@linux.vnet.ibm.com>,
Jenifer Hopper <jhopper@us.ibm.com>, Mel Gorman <mgorman@suse.de>,
Johannes Weiner <jweiner@redhat.com>,
Larry Woodman <lwoodman@redhat.com>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
devel@driverdev.osuosl.org
Subject: Re: [PATCHv2 8/9] zswap: add to mm/
Date: Thu, 07 Feb 2013 10:13:05 -0600 [thread overview]
Message-ID: <5113D291.2020903@linux.vnet.ibm.com> (raw)
In-Reply-To: <5107A2B8.4070505@parallels.com>
On 01/29/2013 04:21 AM, Lord Glauber Costa of Sealand wrote:
> On 01/28/2013 07:27 PM, Seth Jennings wrote:
>> Yes, I prototyped a shrinker interface for zswap, but, as we both
>> figured, it shrinks the zswap compressed pool too aggressively to the
>> point of being useless.
> Can't you advertise a smaller number of objects that you actively have?
Thanks for looking at the code!
An interesting idea. I'm just not sure how you would manage the
underlying policy of how aggressively does zswap allow itself to be
shrunk? The fact that zswap _only_ operates under memory pressure
makes that policy difficult, because it is under continuous shrinking
pressure, unlike other shrinkable caches in the kernel that spend most
of their time operating in unconstrained or lightly/intermittently
strained conditions.
Thanks,
Seth
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next prev parent reply other threads:[~2013-02-07 16:15 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-01-07 20:24 [PATCHv2 0/9] zswap: compressed swap caching Seth Jennings
2013-01-07 20:24 ` [PATCHv2 1/9] staging: zsmalloc: add gfp flags to zs_create_pool Seth Jennings
2013-01-25 0:08 ` Nitin Gupta
2013-01-25 1:33 ` Minchan Kim
2013-01-25 15:07 ` Seth Jennings
2013-01-25 15:56 ` Dan Magenheimer
2013-01-28 2:59 ` Minchan Kim
2013-01-30 16:11 ` Konrad Rzeszutek Wilk
2013-01-31 5:21 ` Minchan Kim
2013-01-25 21:26 ` Rik van Riel
2013-01-07 20:24 ` [PATCHv2 2/9] staging: zsmalloc: remove unsed pool name Seth Jennings
2013-01-25 0:09 ` Nitin Gupta
2013-01-25 21:50 ` Rik van Riel
2013-01-07 20:24 ` [PATCHv2 3/9] staging: zsmalloc: add page alloc/free callbacks Seth Jennings
2013-01-25 0:11 ` Nitin Gupta
2013-01-25 21:55 ` Rik van Riel
2013-01-07 20:24 ` [PATCHv2 4/9] staging: zsmalloc: make CLASS_DELTA relative to PAGE_SIZE Seth Jennings
2013-01-25 0:17 ` Nitin Gupta
2013-01-25 16:38 ` Seth Jennings
2013-01-07 20:24 ` [PATCHv2 5/9] debugfs: add get/set for atomic types Seth Jennings
2013-01-07 20:32 ` Greg Kroah-Hartman
2013-01-07 20:41 ` Seth Jennings
2013-01-25 16:45 ` Seth Jennings
2013-01-25 21:35 ` Greg Kroah-Hartman
2013-01-07 20:24 ` [PATCHv2 6/9] zsmalloc: promote to lib/ Seth Jennings
2013-01-28 4:01 ` Minchan Kim
2013-01-28 4:32 ` Minchan Kim
2013-01-28 17:41 ` Seth Jennings
2013-01-07 20:24 ` [PATCHv2 7/9] mm: break up swap_writepage() for frontswap backends Seth Jennings
2013-01-28 4:22 ` Minchan Kim
2013-01-28 17:26 ` Seth Jennings
2013-01-28 23:46 ` Minchan Kim
2013-01-07 20:24 ` [PATCHv2 8/9] zswap: add to mm/ Seth Jennings
2013-01-08 17:15 ` Dave Hansen
2013-01-08 17:54 ` Dan Magenheimer
2013-01-25 22:44 ` Rik van Riel
2013-01-25 23:15 ` Dan Magenheimer
2013-01-28 15:27 ` Seth Jennings
2013-01-29 10:21 ` Lord Glauber Costa of Sealand
2013-02-07 16:13 ` Seth Jennings [this message]
2013-02-11 19:13 ` Dan Magenheimer
2013-01-07 20:24 ` [PATCHv2 9/9] zswap: add documentation Seth Jennings
2013-01-22 18:10 ` [PATCHv2 0/9] zswap: compressed swap caching Seth Jennings
[not found] <<1357590280-31535-1-git-send-email-sjenning@linux.vnet.ibm.com>
[not found] ` <<1357590280-31535-9-git-send-email-sjenning@linux.vnet.ibm.com>
2013-01-10 22:16 ` [PATCHv2 8/9] zswap: add to mm/ Dan Magenheimer
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