From: Dave Hansen <haveblue@us.ibm.com>
To: Christoph Hellwig <hch@infradead.org>
Cc: Timur Tabi <timur.tabi@ammasso.com>,
linux-mm <linux-mm@kvack.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
kernelnewbies@nl.linux.org
Subject: Re: get_user_pages() still broken in 2.6
Date: Tue, 28 Sep 2004 16:21:18 -0700 [thread overview]
Message-ID: <1096413678.16198.16.camel@localhost> (raw)
In-Reply-To: <20040929000325.A6758@infradead.org>
On Tue, 2004-09-28 at 16:03, Christoph Hellwig wrote:
> get_user_pages locks the page in memory. It doesn't do anything about ptes.
You probably want mlock(2) to keep the kernel from messing with the ptes
at all. But, you should probably really be thinking about why you're
accessing the page tables at all. I count *ONE* instance in drivers/
where page tables are accessed directly.
-- Dave
next prev parent reply other threads:[~2004-09-28 23:21 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-09-28 22:40 get_user_pages() still broken in 2.6 Timur Tabi
2004-09-28 23:03 ` Christoph Hellwig
2004-09-28 23:21 ` Dave Hansen [this message]
2004-09-29 14:46 ` Timur Tabi
2004-09-29 14:48 ` Timur Tabi
2004-09-29 15:01 ` Christoph Hellwig
2004-09-29 4:49 ` opening a file inside the kernel module Rakesh Jagota
2004-09-29 5:00 ` Jeff Garzik
2004-09-29 5:56 ` Rakesh Jagota
2004-09-29 15:52 ` Stuart MacDonald
[not found] <2JyXo-77W-19@gated-at.bofh.it>
[not found] ` <2JzgH-7rT-11@gated-at.bofh.it>
[not found] ` <2JOpu-1y1-21@gated-at.bofh.it>
2004-09-29 15:41 ` get_user_pages() still broken in 2.6 Andi Kleen
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