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From: Ingo Oeser <ingo.oeser@informatik.tu-chemnitz.de>
To: William Lee Irwin III <wli@holomorphy.com>,
	Andrea Arcangeli <andrea@suse.de>,
	linux-kernel@vger.kernel.org
Subject: Re: 64GB NUMA-Q after pgcl
Date: Mon, 31 Mar 2003 23:02:51 +0200	[thread overview]
Message-ID: <20030331230251.F626@nightmaster.csn.tu-chemnitz.de> (raw)
In-Reply-To: <20030331052214.GV13178@holomorphy.com>; from wli@holomorphy.com on Sun, Mar 30, 2003 at 09:22:14PM -0800

Hi William,
hi Andrea,

On Sun, Mar 30, 2003 at 09:22:14PM -0800, William Lee Irwin III wrote:
> Miscellaneous side effects happen, like follow_page() and
> get_user_pages() need to return pfn's instead of struct pages.

Hmm, but you know, that users of get_user_pages() play games with
pages? They need to lock them into memory, mark them eventually
dirty, map them to a struct scatterlist and much more.

I worked on an API (I called it the page-walk-api), to make this
more and more transparent. 

So if this work will go into 2.6.x, then the page-walk-API will
be needed, or else the driver writers playing tricks with
virtual<->physical<->bus address conversions will go nuts.

So which kernel is the target of this development?

Regards

Ingo Oeser

  reply	other threads:[~2003-03-31 21:32 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-03-28  4:00 64GB NUMA-Q after pgcl William Lee Irwin III
2003-03-28  7:45 ` Zwane Mwaikambo
2003-03-28  7:57   ` William Lee Irwin III
2003-03-28  8:05     ` Zwane Mwaikambo
2003-03-28 10:14       ` William Lee Irwin III
2003-03-28 17:38         ` John Levon
2003-03-30 23:19 ` Andrea Arcangeli
2003-03-31  4:27   ` William Lee Irwin III
2003-03-31  5:22     ` William Lee Irwin III
2003-03-31 21:02       ` Ingo Oeser [this message]
2003-03-31 22:27         ` William Lee Irwin III
2003-04-01  1:25           ` Andrea Arcangeli
2003-03-31 18:35     ` Andrea Arcangeli
2003-03-31 18:41       ` Christoph Hellwig
2003-03-31 19:08         ` William Lee Irwin III
2003-04-01  0:47           ` Andrea Arcangeli
2003-04-01  0:44         ` Andrea Arcangeli
2003-03-31 18:55       ` William Lee Irwin III

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