From: Rik van Riel <riel@redhat.com>
To: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: linux-kernel@vger.kernel.org, virtualization@lists.osdl.org,
akpm@osdl.org, nickpiggin@yahoo.com.au, frankeh@watson.ibm.com,
rhim@cc.gateh.edu
Subject: Re: [patch 1/9] Guest page hinting: unused / free pages.
Date: Tue, 12 Sep 2006 18:47:29 -0400 [thread overview]
Message-ID: <45073901.8020906@redhat.com> (raw)
In-Reply-To: <20060901110908.GB15684@skybase>
Martin Schwidefsky wrote:
> From: Martin Schwidefsky <schwidefsky@de.ibm.com>
> From: Hubertus Franke <frankeh@watson.ibm.com>
> From: Himanshu Raj <rhim@cc.gatech.edu>
>
> [patch 1/9] Guest page hinting: unused / free pages.
>
> A very simple but already quite effective improvement in the handling
> of guest memory vs. host memory is to tell the host when pages are
> free.
Would it be an idea to place this interface in-between the
per-cpu free page lists and the buddy allocator, so we can
move a batch of pages around at once and do the hinting in
a batched fashion ?
That way the overhead will be acceptable not just on S390
(where things are millicoded), but also on hypervisor based
virtualization like Xen.
Easy enough to pass a vector of pages to the hypervisor.
--
What is important? What you want to be true, or what is true?
next prev parent reply other threads:[~2006-09-12 22:47 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-09-01 11:09 [patch 1/9] Guest page hinting: unused / free pages Martin Schwidefsky
2006-09-01 15:33 ` Dave Hansen
2006-09-01 15:33 ` Dave Hansen
2006-09-01 15:43 ` Martin Schwidefsky
2006-09-01 15:56 ` Dave Hansen
2006-09-01 15:56 ` Dave Hansen
2006-09-01 16:05 ` Martin Schwidefsky
2006-09-01 16:10 ` Dave Hansen
2006-09-01 16:10 ` Dave Hansen
2006-09-12 22:47 ` Rik van Riel [this message]
2006-09-13 0:07 ` Hubertus Franke
2006-09-13 0:07 ` Hubertus Franke
2006-09-13 1:29 ` Rik van Riel
2006-09-13 8:56 ` Martin Schwidefsky
2006-09-13 8:56 ` Martin Schwidefsky
2006-09-13 12:06 ` Hubertus Franke
2006-09-13 12:45 ` Martin Schwidefsky
2006-09-13 12:45 ` Martin Schwidefsky
2006-09-13 13:06 ` Hubertus Franke
2006-09-13 14:45 ` Rik van Riel
2006-09-13 14:59 ` Martin Schwidefsky
2006-09-13 14:59 ` Martin Schwidefsky
2006-09-13 17:05 ` Hubertus Franke
-- strict thread matches above, loose matches on Subject: below --
2006-08-24 14:29 Martin Schwidefsky, Martin Schwidefsky, Hubertus Franke, Himanshu Raj
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