linux-kernel - Re: Replacement for page fault notifiers?

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Message-ID: <21d7e9970801081413n307ab07aq462a9fff014143ae@mail.gmail.com>
Date:	Wed, 9 Jan 2008 08:13:05 +1000
From:	"Dave Airlie" <airlied@...il.com>
To:	"Christoph Hellwig" <hch@...radead.org>
Cc:	"Pekka Paalanen" <pq@....fi>, linux-kernel@...r.kernel.org,
	jbeulich@...ell.com, proski@....org
Subject: Re: Replacement for page fault notifiers?

On Jan 9, 2008 6:32 AM, Christoph Hellwig <hch@...radead.org> wrote:
> On Tue, Jan 08, 2008 at 09:06:38PM +0200, Pekka Paalanen wrote:
> > - Is there anything coming to replace register_page_fault_notifier()?
>
> no.
>
> > - Has someone found another way to accomplish the same without patching
> > the kernel?
>
> no.
>
> > - Should I start writing a patch to bring back the notifiers, based on
> > the commit that removed them?
>
> no.
>
> > People started to complain to me that mmio-trace does not compile for
> > 2.6.24. At least the Nouveau project is a regular user of mmio-trace
> > for reverse-engineering, and the tool should be easy to use. Therefore
> > I would prefer not to force casual contributors to patch their kernels
> > as it might be too much for some. I am hoping that 2.6.25, if not
> > 2.6.24, would contain a mechanism to accomplish what I need.
>
> Please make mmio tracing generic enough so it works for every device and
> submit it for inclusion as a config option.
>

Christoph,

it is generic code, it works by patching the module you load and is in
no way nvidia specific, I think we should revert your chance
as the notifiers have a valid user and one it has been planned to upstream..

Dave.
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