From: Christoph Lameter <clameter@sgi.com>
To: Paul Menage <menage@google.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
linux-mm@kvack.org, akpm@osdl.org
Subject: Re: [RFC][PATCH 0/1] Node-based reclaim/migration
Date: Wed, 29 Nov 2006 20:17:28 -0800 (PST) [thread overview]
Message-ID: <Pine.LNX.4.64.0611292015280.19628@schroedinger.engr.sgi.com> (raw)
In-Reply-To: <6599ad830611291631hd6d3e52y971c35708004db00@mail.gmail.com>
On Wed, 29 Nov 2006, Paul Menage wrote:
> Hmm, isn't migration just analagous to swapping out and swapping back
> in again, but without the actual swapping?
That used to be the case in the beginning. Not anymore. The page is
directly moved to the target. Migration via swap is no longer supported.
> If what you describe is a problem, then wouldn't you have a problem if
> you were doing migration on a particular mm structure, but it was
> sharing pages with another mm?
You do not have a problem as long as you hold a mmap_sem lock on any of
the vmas in which the page appears. Kame and I discussed several
approached on how to avoid the issue in the past but so far there was no
need to resolve the issue.
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next prev parent reply other threads:[~2006-11-30 4:17 UTC|newest]
Thread overview: 54+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-11-29 3:06 menage
2006-11-29 3:06 ` [RFC][PATCH 1/1] Expose per-node reclaim and migration to userspace menage
2006-11-29 6:07 ` Nick Piggin
2006-11-29 21:57 ` Paul Menage
2006-11-30 4:13 ` Christoph Lameter
2006-11-30 4:18 ` Paul Menage
2006-11-30 7:38 ` Nick Piggin
2006-11-30 7:57 ` Paul Menage
2006-11-30 8:26 ` Nick Piggin
2006-11-30 8:39 ` Paul Menage
2006-11-30 8:55 ` Nick Piggin
2006-11-30 9:06 ` Paul Menage
2006-11-30 9:21 ` Nick Piggin
2006-11-30 9:45 ` Paul Menage
2006-11-30 10:15 ` Nick Piggin
2006-11-30 10:40 ` Paul Menage
2006-11-30 11:04 ` Nick Piggin
2006-11-30 11:23 ` Paul Menage
2006-11-30 11:35 ` Nick Piggin
2006-11-30 0:18 ` KAMEZAWA Hiroyuki
2006-11-30 0:25 ` Paul Menage
2006-11-30 0:38 ` KAMEZAWA Hiroyuki
2006-11-30 4:15 ` Christoph Lameter
2006-11-30 4:10 ` Christoph Lameter
2006-11-30 0:31 ` [RFC][PATCH 0/1] Node-based reclaim/migration KAMEZAWA Hiroyuki
2006-11-30 0:31 ` Paul Menage
2006-11-30 4:11 ` KAMEZAWA Hiroyuki
2006-11-30 4:17 ` Christoph Lameter [this message]
2006-11-30 10:45 ` Paul Menage
2006-11-30 11:12 ` KAMEZAWA Hiroyuki
2006-11-30 11:25 ` Paul Menage
2006-11-30 12:18 ` KAMEZAWA Hiroyuki
2006-11-30 18:28 ` Christoph Lameter
2006-11-30 18:35 ` Paul Menage
2006-11-30 18:39 ` Christoph Lameter
2006-11-30 19:09 ` Paul Menage
2006-11-30 19:42 ` Christoph Lameter
2006-11-30 19:53 ` Paul Menage
2006-11-30 20:00 ` Christoph Lameter
2006-11-30 20:07 ` Paul Menage
2006-11-30 20:15 ` Christoph Lameter
2006-11-30 21:33 ` Paul Menage
2006-11-30 23:41 ` Christoph Lameter
2006-11-30 23:48 ` Paul Menage
2006-12-01 2:23 ` Christoph Lameter
2006-12-01 19:32 ` Paul Menage
2006-12-01 19:56 ` Christoph Lameter
2006-12-01 2:44 ` KAMEZAWA Hiroyuki
2006-12-01 2:43 ` Christoph Lameter
2006-12-01 2:59 ` KAMEZAWA Hiroyuki
2006-12-01 2:44 ` Christoph Lameter
2006-12-01 3:10 ` KAMEZAWA Hiroyuki
2006-12-01 5:28 ` Christoph Lameter
2006-11-30 4:04 ` Christoph Lameter
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