linux-kernel - Re: [PATCH -rt] Fix kmap_high

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Message-ID: <alpine.LFD.2.00.0908141152290.10633@xanadu.home>
Date:	Fri, 14 Aug 2009 11:58:59 -0400 (EDT)
From:	Nicolas Pitre <nico@...vell.com>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc:	Uwe Kleine-König 
	<u.kleine-koenig@...gutronix.de>,
	Thomas Gleixner <tglx@...utronix.de>,
	rt-users <linux-rt-users@...r.kernel.org>,
	MinChan Kim <minchan.kim@...il.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>, Li Zefan <lizf@...fujitsu.com>,
	Jens Axboe <jens.axboe@...cle.com>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH -rt] Fix kmap_high_get()

On Fri, 14 Aug 2009, Peter Zijlstra wrote:

> As to the patch, its not quite right.
> 
> From what I understand kmap_high_get() is used to pin a page's kmap iff
> it has one, whereas the result of your patch seems to be that it'll
> actually create one if its not found.

I don't have enough context to review this patch, but your understanding 
of the kmap_high_get() purpose is right.


Nicolas
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