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From: Jes Sorensen <jes@sgi.com>
To: Linus Torvalds <torvalds@osdl.org>
Cc: Andrew Morton <akpm@osdl.org>,
	linux-kernel@vger.kernel.org, linux-ia64@vger.kernel.org,
	hch@lst.de, cotte@de.ibm.com, Hugh Dickins <hugh@veritas.com>
Subject: Re: [patch] mspec - special memory driver and do_no_pfn handler
Date: Fri, 17 Mar 2006 09:42:01 +0000	[thread overview]
Message-ID: <441A8469.8020504@sgi.com> (raw)
In-Reply-To: <Pine.LNX.4.64.0603161659210.3618@g5.osdl.org>

Linus Torvalds wrote:
> Quite frankly, I don't think nopfn() is a good interface. It's only usable 
> for one single thing, so trying to claim that it's a generic VM op is 
> really not valid. If (and that's a big if) we need this interface, we 
> should just do it inside mm/memory.c instead of playing games as if it was 
> generic.

Hi Linus,

As Robin mentioned I believe Carsten was also looking for this interface
and I received an email from Bjorn Helgas after posting this stating
that he was also looking for it, so there may be several users for it.

I believe it was originally Christoph who suggested we took this
approach to avoid playing tricks on do_no_page. However, if you have a
suggestion for how to do it in a better way, I shall be happy to try
and implement it that way instead, if you'll share the details.

Cheers,
Jes

WARNING: multiple messages have this Message-ID (diff)
From: Jes Sorensen <jes@sgi.com>
To: Linus Torvalds <torvalds@osdl.org>
Cc: Andrew Morton <akpm@osdl.org>,
	linux-kernel@vger.kernel.org, linux-ia64@vger.kernel.org,
	hch@lst.de, cotte@de.ibm.com, Hugh Dickins <hugh@veritas.com>
Subject: Re: [patch] mspec - special memory driver and do_no_pfn handler
Date: Fri, 17 Mar 2006 10:42:01 +0100	[thread overview]
Message-ID: <441A8469.8020504@sgi.com> (raw)
In-Reply-To: <Pine.LNX.4.64.0603161659210.3618@g5.osdl.org>

Linus Torvalds wrote:
> Quite frankly, I don't think nopfn() is a good interface. It's only usable 
> for one single thing, so trying to claim that it's a generic VM op is 
> really not valid. If (and that's a big if) we need this interface, we 
> should just do it inside mm/memory.c instead of playing games as if it was 
> generic.

Hi Linus,

As Robin mentioned I believe Carsten was also looking for this interface
and I received an email from Bjorn Helgas after posting this stating
that he was also looking for it, so there may be several users for it.

I believe it was originally Christoph who suggested we took this
approach to avoid playing tricks on do_no_page. However, if you have a
suggestion for how to do it in a better way, I shall be happy to try
and implement it that way instead, if you'll share the details.

Cheers,
Jes

  parent reply	other threads:[~2006-03-17  9:42 UTC|newest]

Thread overview: 42+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-03-16 16:55 [patch] mspec - special memory driver and do_no_pfn handler Jes Sorensen
2006-03-16 16:55 ` Jes Sorensen
2006-03-17  0:37 ` Andrew Morton
2006-03-17  0:37   ` Andrew Morton
2006-03-17  1:04   ` Linus Torvalds
2006-03-17  1:04     ` Linus Torvalds
2006-03-17  2:13     ` Robin Holt
2006-03-17  2:13       ` Robin Holt
2006-03-17  4:58     ` Benjamin Herrenschmidt
2006-03-17  4:58       ` Benjamin Herrenschmidt
2006-03-17  9:15       ` Jes Sorensen
2006-03-17  9:15         ` Jes Sorensen
2006-03-17 13:29         ` Carsten Otte
2006-03-17 13:29           ` Carsten Otte
2006-03-17 18:03           ` Christoph Hellwig
2006-03-17 18:03             ` Christoph Hellwig
2006-03-17  9:42     ` Jes Sorensen [this message]
2006-03-17  9:42       ` Jes Sorensen
2006-03-17 12:29     ` Carsten Otte
2006-03-17 12:29       ` Carsten Otte
2006-03-17 12:28   ` [patch 1/2] do_no_pfn handler (was: Re: [patch] mspec - special memory driver and do_no_pfn handler) Jes Sorensen
2006-03-17 12:28     ` Jes Sorensen
2006-03-17 12:38   ` [patch 2/2] mspec driver " Jes Sorensen
2006-03-17 12:38     ` Jes Sorensen
2006-03-17 13:36     ` [patch 2/2] mspec driver Nick Piggin
2006-03-17 13:36       ` Nick Piggin
2006-03-17 14:04       ` Jes Sorensen
2006-03-17 14:04         ` Jes Sorensen
2006-03-17 14:09         ` Nick Piggin
2006-03-17 14:09           ` Nick Piggin
2006-03-17 14:11           ` Jes Sorensen
2006-03-17 14:11             ` Jes Sorensen
2006-03-17 14:16             ` Nick Piggin
2006-03-17 14:16               ` Nick Piggin
2006-03-17 13:51 ` [patch] mspec - special memory driver and do_no_pfn handler Carsten Otte
2006-03-17 13:51   ` Carsten Otte
2006-03-17 13:53   ` Carsten Otte
2006-03-17 13:53     ` Carsten Otte
2006-03-17 13:56   ` Nick Piggin
2006-03-17 13:56     ` Nick Piggin
2006-03-17 13:58   ` Jes Sorensen
2006-03-17 13:58     ` Jes Sorensen

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