All of lore.kernel.org
 help / color / mirror / Atom feed
From: "Michael S. Tsirkin" <mst@redhat.com>
To: Avi Kivity <avi@redhat.com>
Cc: Alex Williamson <alex.williamson@redhat.com>,
	Jan Kiszka <jan.kiszka@web.de>,
	Marcelo Tosatti <mtosatti@redhat.com>,
	"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
	"ddutile@redhat.com" <ddutile@redhat.com>,
	"chrisw@redhat.com" <chrisw@redhat.com>
Subject: Re: [RFC PATCH 0/2] Expose available KVM free memory slot count to help avoid aborts
Date: Thu, 27 Jan 2011 11:26:19 +0200	[thread overview]
Message-ID: <20110127092619.GA30424@redhat.com> (raw)
In-Reply-To: <4D41392B.2070609@redhat.com>

On Thu, Jan 27, 2011 at 11:21:47AM +0200, Avi Kivity wrote:
> On 01/26/2011 02:08 PM, Michael S. Tsirkin wrote:
> >>  >
> >>  >I just mean that once you fault you map sptes and then you can use them
> >>  >without exits.  mmio will cause exits each time. Right?
> >>
> >>  The swapper scanning sptes, ksmd, khugepaged, and swapping can all
> >>  cause a page to be unmapped.  Though it should certainly happen with
> >>  a much lower frequency than mmio.
> >
> >Right. That's why I say that sorting by size might not be optimal.
> >Maybe a cache ...
> 
> Why would it not be optimal?
> 
> If you have 16GB RAM in two slots and a few megabytes here and there
> scattered in some slots, you have three orders of magnitudes to
> spare.

Yes but you might not be accessing all that RAM.
Maybe your workset is just tens of megabytes.

> -- 
> error compiling committee.c: too many arguments to function

  reply	other threads:[~2011-01-27  9:26 UTC|newest]

Thread overview: 50+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-01-21 23:48 [RFC PATCH 0/2] Expose available KVM free memory slot count to help avoid aborts Alex Williamson
2011-01-21 23:48 ` [RFC PATCH 1/2] kvm: Allow querying free slots Alex Williamson
2011-01-21 23:48 ` [RFC PATCH 2/2] device-assignment: Count required kvm memory slots Alex Williamson
2011-01-22 22:11 ` [RFC PATCH 0/2] Expose available KVM free memory slot count to help avoid aborts Michael S. Tsirkin
2011-01-24  9:32 ` Marcelo Tosatti
2011-01-24 14:16   ` Jan Kiszka
2011-01-24 15:44     ` Alex Williamson
2011-01-25  5:37       ` Alex Williamson
2011-01-25  7:36         ` Jan Kiszka
2011-01-25 14:41           ` Alex Williamson
2011-01-25 14:45             ` Michael S. Tsirkin
2011-01-25 14:54               ` Avi Kivity
2011-01-25 14:53             ` Avi Kivity
2011-01-25 14:59               ` Michael S. Tsirkin
2011-01-25 17:33                 ` Avi Kivity
2011-01-25 17:58                   ` Michael S. Tsirkin
2011-01-26  9:17                     ` Avi Kivity
2011-01-26  9:20                       ` Michael S. Tsirkin
2011-01-26  9:23                         ` Avi Kivity
2011-01-26  9:39                           ` Michael S. Tsirkin
2011-01-26  9:54                             ` Avi Kivity
2011-01-26 12:08                               ` Michael S. Tsirkin
2011-01-27  9:21                                 ` Avi Kivity
2011-01-27  9:26                                   ` Michael S. Tsirkin [this message]
2011-01-27  9:28                                     ` Avi Kivity
2011-01-27  9:29                                       ` Michael S. Tsirkin
2011-01-27  9:51                                         ` Avi Kivity
2011-01-27  9:28                                     ` Michael S. Tsirkin
2011-01-25 16:35               ` Jan Kiszka
2011-01-25 19:13                 ` Alex Williamson
2011-01-26  8:14                   ` Jan Kiszka
2011-01-25 10:23         ` Avi Kivity
2011-01-25 14:57           ` Alex Williamson
2011-01-25 17:11             ` Avi Kivity
2011-01-25 17:43               ` Alex Williamson
2011-01-26  9:22                 ` Avi Kivity
2011-01-31 19:18         ` Marcelo Tosatti
2011-02-23 21:46           ` Alex Williamson
2011-02-24 12:34             ` Avi Kivity
2011-02-24 12:37               ` Avi Kivity
2011-02-24 18:10               ` Alex Williamson
2011-01-25 10:20   ` Avi Kivity
2011-01-25 14:46     ` Alex Williamson
2011-01-25 14:56       ` Avi Kivity
2011-01-25 14:55     ` Michael S. Tsirkin
2011-01-25 14:58       ` Avi Kivity
2011-01-25 15:23         ` Michael S. Tsirkin
2011-01-25 17:34           ` Avi Kivity
2011-01-25 18:00             ` Michael S. Tsirkin
2011-01-26  9:25               ` Avi Kivity

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20110127092619.GA30424@redhat.com \
    --to=mst@redhat.com \
    --cc=alex.williamson@redhat.com \
    --cc=avi@redhat.com \
    --cc=chrisw@redhat.com \
    --cc=ddutile@redhat.com \
    --cc=jan.kiszka@web.de \
    --cc=kvm@vger.kernel.org \
    --cc=mtosatti@redhat.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.