From: Christoph Lameter <cl@linux.com>
To: Balbir Singh <balbir@linux.vnet.ibm.com>
Cc: kvm@vger.kernel.org, linux-mm@kvack.org, qemu-devel@nongnu.org
Subject: Re: [RFC][PATCH 1/3] Linux/Guest unmapped page cache control
Date: Wed, 3 Nov 2010 12:58:45 -0500 (CDT) [thread overview]
Message-ID: <alpine.DEB.2.00.1011031257250.16107@router.home> (raw)
In-Reply-To: <20101103171733.GP3769@balbir.in.ibm.com>
On Wed, 3 Nov 2010, Balbir Singh wrote:
> > > +#define UNMAPPED_PAGE_RATIO 16
> >
> > Maybe come up with a scheme that allows better configuration of the
> > mininum? I think in some setting we may want an absolute limit and in
> > other a fraction of something (total zone size or working set?)
> >
>
> Are you suggesting a sysctl or computation based on zone size and
> limit, etc? I understand it to be the latter.
Do a computation based on zone size on startup and then allow the
user to modify the absolute size of the page cache?
Hmmm.. That would have to be per zone/node or somehow distributed over all
zones/nodes.
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next prev parent reply other threads:[~2010-11-03 17:58 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-10-28 22:40 [RFC][PATCH 0/3] KVM page cache optimization (v3) Balbir Singh
2010-10-28 22:40 ` [RFC][PATCH 1/3] Linux/Guest unmapped page cache control Balbir Singh
2010-11-03 14:35 ` Christoph Lameter
2010-11-03 17:17 ` Balbir Singh
2010-11-03 17:58 ` Christoph Lameter [this message]
2010-10-28 22:40 ` [RFC][PATCH 2/3] Linux/Guest cooperative " Balbir Singh
2010-10-28 22:40 ` [RFC][PATCH 3/3] QEmu changes to provide balloon hint Balbir Singh
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