From: Christoph Lameter <cl@linux.com>
To: Huang Shijie <shijie8@gmail.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
Minchan Kim <minchan.kim@gmail.com>,
linux-mm@kvack.org
Subject: Re: Does get_user_pages_fast lock the user pages in memory in my case?
Date: Tue, 21 Apr 2009 15:47:35 -0400 (EDT) [thread overview]
Message-ID: <alpine.DEB.1.10.0904211544190.28178@qirst.com> (raw)
In-Reply-To: <49EC44C6.1010603@gmail.com>
On Mon, 20 Apr 2009, Huang Shijie wrote:
> I will read the migration code, I am not clear about why the gup() can stop
> the migraion.
Because it increases the refcount of the page. Page migration is then
unable to account for all the references to a page and therefore the page
cannot be migrated.
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next prev parent reply other threads:[~2009-04-21 19:54 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-04-17 7:01 Huang Shijie
2009-04-18 6:18 ` KOSAKI Motohiro
2009-04-20 2:22 ` Huang Shijie
2009-04-19 23:45 ` Minchan Kim
2009-04-20 2:15 ` Huang Shijie
2009-04-20 2:42 ` Minchan Kim
2009-04-20 3:28 ` Huang Shijie
2009-04-20 3:42 ` KOSAKI Motohiro
2009-04-20 4:53 ` Minchan Kim
2009-04-20 5:05 ` KOSAKI Motohiro
2009-04-20 5:05 ` Huang Shijie
2009-04-20 5:19 ` KOSAKI Motohiro
2009-04-20 5:37 ` Huang Shijie
2009-04-20 7:59 ` KOSAKI Motohiro
2009-04-20 8:23 ` Huang Shijie
2009-04-20 9:24 ` KOSAKI Motohiro
2009-04-20 9:47 ` Huang Shijie
2009-04-21 1:43 ` KOSAKI Motohiro
2009-04-21 19:47 ` Christoph Lameter [this message]
2009-04-20 5:24 ` Minchan Kim
2009-04-20 5:42 ` Huang Shijie
2009-04-20 3:57 ` Huang Shijie
2009-04-22 6:08 ` Huang Shijie
2009-04-22 9:46 ` Minchan Kim
2009-04-20 3:18 ` KOSAKI Motohiro
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