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Date: Tue, 29 Jan 2013 14:21:44 +0400
From: Lord Glauber Costa of Sealand <glommer@parallels.com>
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To: Seth Jennings <sjenning@linux.vnet.ibm.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/
References: <1357590280-31535-1-git-send-email-sjenning@linux.vnet.ibm.com> <1357590280-31535-9-git-send-email-sjenning@linux.vnet.ibm.com> <51030ADA.8030403@redhat.com> <510698F5.5060205@linux.vnet.ibm.com>
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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?

Since the shrinker would never try to shrink more objects than you
advertised, you could control pressure this way.