From: Minchan Kim <minchan@kernel.org>
To: Rafael Aquini <aquini@redhat.com>
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org,
virtualization@lists.linux-foundation.org,
Rusty Russell <rusty@rustcorp.com.au>,
"Michael S. Tsirkin" <mst@redhat.com>,
Rik van Riel <riel@redhat.com>, Mel Gorman <mel@csn.ul.ie>,
Andi Kleen <andi@firstfloor.org>,
Andrew Morton <akpm@linux-foundation.org>,
Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Subject: Re: [PATCH v2 0/4] make balloon pages movable by compaction
Date: Fri, 29 Jun 2012 10:37:12 +0900 [thread overview]
Message-ID: <4FED06C8.1090003@kernel.org> (raw)
In-Reply-To: <cover.1340916058.git.aquini@redhat.com>
Hi Rafael,
On 06/29/2012 06:49 AM, Rafael Aquini wrote:
> This patchset follows the main idea discussed at 2012 LSFMMS section:
> "Ballooning for transparent huge pages" -- http://lwn.net/Articles/490114/
Could you summarize the problem, solution instead of link URL in cover-letter?
IIUC, the problem is that it is hard to get contiguous memory in guest-side
after ballooning happens because guest-side memory could be very fragmented
by ballooned page. It makes THP page allocation of guest-side very poor success ratio.
The solution is that when memory ballooning happens, we allocates ballooned page
as a movable page in guest-side because they can be migrated easily so compaction of
guest-side could put together them into either side so that we can get contiguous memory.
For it, compaction should be aware of ballooned page.
Right?
--
Kind regards,
Minchan Kim
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next prev parent reply other threads:[~2012-06-29 1:36 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-06-28 21:49 [PATCH v2 0/4] make balloon pages movable by compaction Rafael Aquini
2012-06-28 21:49 ` [PATCH v2 1/4] mm: introduce compaction and migration for virtio ballooned pages Rafael Aquini
2012-06-29 5:32 ` Minchan Kim
2012-06-29 17:36 ` Rafael Aquini
2012-06-29 22:03 ` Minchan Kim
2012-06-30 1:34 ` Rafael Aquini
2012-07-01 23:36 ` Minchan Kim
2012-07-03 18:31 ` Rafael Aquini
2012-06-29 15:31 ` Mel Gorman
2012-06-29 17:43 ` Rafael Aquini
2012-06-28 21:49 ` [PATCH v2 2/4] virtio_balloon: handle concurrent accesses to virtio_balloon struct elements Rafael Aquini
2012-06-28 21:49 ` [PATCH v2 3/4] virtio_balloon: introduce migration primitives to balloon pages Rafael Aquini
2012-06-28 21:49 ` [PATCH v2 4/4] mm: add vm event counters for balloon pages compaction Rafael Aquini
2012-06-29 1:37 ` Minchan Kim [this message]
2012-06-29 3:51 ` [PATCH v2 0/4] make balloon pages movable by compaction Rafael Aquini
2012-06-29 4:31 ` Rusty Russell
2012-06-29 17:46 ` Rafael Aquini
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