From: Marcelo Tosatti <mtosatti@redhat.com>
To: Anthony Liguori <aliguori@us.ibm.com>
Cc: Avi Kivity <avi@qumranet.com>,
Andrea Arcangeli <andrea@qumranet.com>,
kvm-devel <kvm@vger.kernel.org>
Subject: Re: madvise() not triggering page discard with MMU-notifiers
Date: Tue, 19 Aug 2008 22:16:55 -0300 [thread overview]
Message-ID: <20080820011655.GA11137@dmt.cnet> (raw)
In-Reply-To: <48A9F1E9.6040907@us.ibm.com>
Hi Anthony,
On Mon, Aug 18, 2008 at 05:04:25PM -0500, Anthony Liguori wrote:
> Attached is an updated migration patch. It does not appear, however,
> that madvise() is triggering discarding of pages even with an
> MMU-notifier enabled kernel. I take it that this is because we're still
> holding a reference count to the page when it is in the shadow page
> table? Any ETA on when this will change?
Shadow references should be dropped via kvm_unmap_rmapp -> rmap_remove.
So the symptom is that RSS for the task does not decrease accordingly to
the ballooned down size?
next prev parent reply other threads:[~2008-08-20 1:19 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-08-18 22:04 madvise() not triggering page discard with MMU-notifiers Anthony Liguori
2008-08-20 1:16 ` Marcelo Tosatti [this message]
2008-08-20 20:38 ` Anthony Liguori
2008-08-28 14:23 ` Andrea Arcangeli
2008-08-28 22:55 ` Anthony Liguori
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