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From: Pavel Roskin <proski@gnu.org>
To: Christoph Hellwig <hch@infradead.org>
Cc: benh@kernel.crashing.org, Dave Airlie <airlied@gmail.com>,
	Pekka Paalanen <pq@iki.fi>,
	linux-kernel@vger.kernel.org, jbeulich@novell.com
Subject: Re: Replacement for page fault notifiers?
Date: Wed, 09 Jan 2008 15:41:08 -0500	[thread overview]
Message-ID: <1199911268.11485.18.camel@dv> (raw)
In-Reply-To: <20080109202644.GA5514@infradead.org>


On Wed, 2008-01-09 at 20:26 +0000, Christoph Hellwig wrote:
> On Wed, Jan 09, 2008 at 03:24:16PM -0500, Pavel Roskin wrote:
> > I just assumed (wrongly, as it seems) that the API change didn't remove
> > any useful functionality.
> 
> No, this was exactly the correct assumption.  Out of tree modules simply
> don't count.
> 
> > The problem is that mmiotrace only makes sense in combination with
> > non-free drivers, and I'm not sure it would be welcome in the kernel
> > even if you say so.
> 
> It can trace every driver in theory although it's of course not
> really interesting for free drivers.  But it's not actually
> functionality used by the drivers but functionlity to trace the drivers
> so it's quite different anyway.

OK, that's reassuring.  Maybe it could be used for profiling or to find
bugs that are not obvious otherwise.

-- 
Regards,
Pavel Roskin

  reply	other threads:[~2008-01-09 20:41 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-01-08 19:06 Pekka Paalanen
2008-01-08 20:32 ` Christoph Hellwig
2008-01-08 22:13   ` Dave Airlie
2008-01-09  0:26     ` Benjamin Herrenschmidt
2008-01-09 18:18       ` Pavel Roskin
2008-01-09 18:21         ` Christoph Hellwig
2008-01-09 19:58           ` Benjamin Herrenschmidt
2008-01-09 20:22             ` Christoph Hellwig
2008-01-10  0:42               ` Arjan van de Ven
2008-01-10  0:47                 ` Andi Kleen
2008-01-10  0:55                   ` Arjan van de Ven
2008-01-10  0:58                     ` Benjamin Herrenschmidt
2008-01-10  1:01                     ` Andi Kleen
2008-01-10  0:56                 ` Benjamin Herrenschmidt
2008-01-10  2:03                 ` Matt Mackall
2008-01-10  2:21                   ` Pavel Roskin
2008-01-10  2:30                     ` Matt Mackall
2008-01-10 18:44               ` Pekka Paalanen
2008-01-09 20:24             ` Pavel Roskin
2008-01-09 20:26               ` Christoph Hellwig
2008-01-09 20:41                 ` Pavel Roskin [this message]
2008-01-09 20:44                 ` Valdis.Kletnieks

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