From: Daniel Phillips <phillips@arcor.de>
To: Andrew Morton <akpm@osdl.org>, paulmck@us.ibm.com
Cc: hch@infradead.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: Non-GPL export of invalidate_mmap_range
Date: Thu, 19 Feb 2004 15:56:49 -0500 [thread overview]
Message-ID: <200402191531.56618.phillips@arcor.de> (raw)
In-Reply-To: <20040217161929.7e6b2a61.akpm@osdl.org>
On Tuesday 17 February 2004 19:19, Andrew Morton wrote:
> I don't see any licensing issues with the patch because the filesystem
> which needs it clearly meets Linus's "this is not a derived work" criteria.
>
> And I don't see a technical problem with the export: given that we export
> truncate_inode_pages() it makes sense to also export the corresponding
> pagetable shootdown function.
>
> Yes, this is a sensitive issue. Can we please evaluate it strictly
> according to technical and licensing considerations?
>
> Having said that, what concerns issues remain with Paul's patch?
Hi Andrew,
OpenGFS and Sistina GFS use zap_page_range directly, essentially doing the
same as invalidate_mmap_range but skipping any vmas belonging to MAP_PRIVATE
mmaps. This avoids destroying data on anon pages. GPFS and every other DFS
have the same problem as far as I can see, and it isn't addressed by
exporting invalidate_mmap_range as it stands. Paul?
Regards,
Daniel
WARNING: multiple messages have this Message-ID (diff)
From: Daniel Phillips <phillips@arcor.de>
To: Andrew Morton <akpm@osdl.org>, paulmck@us.ibm.com
Cc: hch@infradead.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: Non-GPL export of invalidate_mmap_range
Date: Thu, 19 Feb 2004 15:56:49 -0500 [thread overview]
Message-ID: <200402191531.56618.phillips@arcor.de> (raw)
In-Reply-To: <20040217161929.7e6b2a61.akpm@osdl.org>
On Tuesday 17 February 2004 19:19, Andrew Morton wrote:
> I don't see any licensing issues with the patch because the filesystem
> which needs it clearly meets Linus's "this is not a derived work" criteria.
>
> And I don't see a technical problem with the export: given that we export
> truncate_inode_pages() it makes sense to also export the corresponding
> pagetable shootdown function.
>
> Yes, this is a sensitive issue. Can we please evaluate it strictly
> according to technical and licensing considerations?
>
> Having said that, what concerns issues remain with Paul's patch?
Hi Andrew,
OpenGFS and Sistina GFS use zap_page_range directly, essentially doing the
same as invalidate_mmap_range but skipping any vmas belonging to MAP_PRIVATE
mmaps. This avoids destroying data on anon pages. GPFS and every other DFS
have the same problem as far as I can see, and it isn't addressed by
exporting invalidate_mmap_range as it stands. Paul?
Regards,
Daniel
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next prev parent reply other threads:[~2004-02-19 20:59 UTC|newest]
Thread overview: 135+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-02-16 19:09 Non-GPL export of invalidate_mmap_range Paul E. McKenney
2004-02-16 19:09 ` Paul E. McKenney
2004-02-17 2:31 ` Andrew Morton
2004-02-17 2:31 ` Andrew Morton
2004-02-17 7:35 ` Christoph Hellwig
2004-02-17 7:35 ` Christoph Hellwig
2004-02-17 12:40 ` Paul E. McKenney
2004-02-17 12:40 ` Paul E. McKenney
2004-02-18 0:19 ` Andrew Morton
2004-02-18 0:19 ` Andrew Morton
2004-02-18 12:51 ` Arjan van de Ven
2004-02-18 14:00 ` Paul E. McKenney
2004-02-18 14:00 ` Paul E. McKenney
2004-02-18 21:10 ` Christoph Hellwig
2004-02-18 21:10 ` Christoph Hellwig
2004-02-18 15:06 ` Paul E. McKenney
2004-02-18 15:06 ` Paul E. McKenney
2004-02-18 22:21 ` Christoph Hellwig
2004-02-18 22:21 ` Christoph Hellwig
2004-02-18 22:51 ` Andrew Morton
2004-02-18 22:51 ` Andrew Morton
2004-02-18 23:00 ` Christoph Hellwig
2004-02-18 23:00 ` Christoph Hellwig
2004-02-18 16:21 ` Paul E. McKenney
2004-02-18 16:21 ` Paul E. McKenney
2004-02-18 23:32 ` Andrew Morton
2004-02-18 23:32 ` Andrew Morton
2004-02-19 12:32 ` Christoph Hellwig
2004-02-19 12:32 ` Christoph Hellwig
2004-02-19 18:56 ` Andrew Morton
2004-02-19 18:56 ` Andrew Morton
2004-02-19 19:01 ` Christoph Hellwig
2004-02-19 19:01 ` Christoph Hellwig
2004-02-19 13:04 ` Paul E. McKenney
2004-02-19 13:04 ` Paul E. McKenney
2004-02-20 3:17 ` Anton Blanchard
2004-02-20 3:17 ` Anton Blanchard
2004-02-20 21:46 ` Valdis.Kletnieks
2004-02-19 0:28 ` Andrew Morton
2004-02-19 0:28 ` Andrew Morton
2004-02-18 18:36 ` Paul E. McKenney
2004-02-18 18:36 ` Paul E. McKenney
2004-02-19 12:31 ` Christoph Hellwig
2004-02-19 12:31 ` Christoph Hellwig
2004-02-19 9:11 ` Paul E. McKenney
2004-02-19 9:11 ` Paul E. McKenney
2004-02-19 18:32 ` Lars Marowsky-Bree
2004-02-19 18:38 ` Arjan van de Ven
2004-02-19 19:16 ` viro
2004-02-19 19:16 ` viro
2004-02-19 16:15 ` Paul E. McKenney
2004-02-19 16:15 ` Paul E. McKenney
2004-02-19 18:59 ` Tim Bird
2004-02-19 18:59 ` Tim Bird
2004-02-20 1:27 ` David Schwartz
2004-02-19 9:11 ` David Weinehall
2004-02-19 9:11 ` David Weinehall
2004-02-19 8:58 ` Paul E. McKenney
2004-02-19 8:58 ` Paul E. McKenney
2004-03-04 5:51 ` Mike Fedyk
2004-03-04 5:51 ` Mike Fedyk
2004-02-19 10:29 ` Lars Marowsky-Bree
2004-02-19 10:29 ` Lars Marowsky-Bree
2004-02-19 9:00 ` Paul E. McKenney
2004-02-19 9:00 ` Paul E. McKenney
2004-02-19 11:11 ` Arjan van de Ven
2004-02-19 11:53 ` Lars Marowsky-Bree
2004-02-19 11:53 ` Lars Marowsky-Bree
2004-02-18 18:04 ` Tim Bird
2004-02-18 18:04 ` Tim Bird
2004-02-19 20:56 ` Daniel Phillips [this message]
2004-02-19 20:56 ` Daniel Phillips
2004-02-19 22:06 ` Stephen C. Tweedie
2004-02-19 22:06 ` Stephen C. Tweedie
2004-02-19 22:31 ` Daniel Phillips
2004-02-19 22:31 ` Daniel Phillips
2004-02-19 16:42 ` Paul E. McKenney
2004-02-19 16:42 ` Paul E. McKenney
2004-02-20 2:06 ` Daniel Phillips
2004-02-20 2:06 ` Daniel Phillips
2004-02-19 19:47 ` Paul E. McKenney
2004-02-19 19:47 ` Paul E. McKenney
2004-02-20 5:07 ` Daniel Phillips
2004-02-20 5:07 ` Daniel Phillips
2004-02-20 12:02 ` Paul E. McKenney
2004-02-20 12:02 ` Paul E. McKenney
2004-02-20 20:37 ` Daniel Phillips
2004-02-20 20:37 ` Daniel Phillips
2004-02-20 14:01 ` Paul E. McKenney
2004-02-20 14:01 ` Paul E. McKenney
2004-02-20 23:00 ` Daniel Phillips
2004-02-20 23:00 ` Daniel Phillips
2004-02-20 16:17 ` Paul E. McKenney
2004-02-20 16:17 ` Paul E. McKenney
2004-02-21 3:19 ` Daniel Phillips
2004-02-21 3:19 ` Daniel Phillips
2004-02-21 19:00 ` Daniel Phillips
2004-02-22 23:39 ` Paul E. McKenney
2004-02-25 21:04 ` [RFC] Distributed mmap API Daniel Phillips
2004-02-25 21:04 ` Daniel Phillips
2004-02-25 19:12 ` Paul E. McKenney
2004-02-25 19:12 ` Paul E. McKenney
2004-02-25 19:14 ` Paul E. McKenney
2004-02-25 19:14 ` Paul E. McKenney
2004-02-25 22:07 ` Andrew Morton
2004-02-25 22:07 ` Andrew Morton
2004-02-25 22:07 ` Daniel Phillips
2004-02-25 22:07 ` Daniel Phillips
2004-02-25 22:16 ` Andrew Morton
2004-02-25 22:16 ` Andrew Morton
2004-02-25 22:46 ` Daniel Phillips
2004-02-25 22:46 ` Daniel Phillips
2004-03-03 3:00 ` Daniel Phillips
2004-03-03 3:00 ` Daniel Phillips
2004-03-03 3:15 ` Andrew Morton
2004-03-03 3:15 ` Andrew Morton
2004-03-03 13:06 ` Daniel Phillips
2004-03-03 13:06 ` Daniel Phillips
2004-03-04 18:55 ` Paul E. McKenney
2004-03-04 18:55 ` Paul E. McKenney
2004-02-20 21:17 ` Non-GPL export of invalidate_mmap_range Christoph Hellwig
2004-02-20 21:17 ` Christoph Hellwig
2004-02-20 22:16 ` Daniel Phillips
2004-02-20 22:16 ` Daniel Phillips
2004-02-20 23:56 ` GFS requirements (was: Non-GPL export of invalidate_mmap_range) Lars Marowsky-Bree
2004-02-21 3:16 ` Daniel Phillips
2004-02-21 14:17 ` Lars Marowsky-Bree
2004-02-21 19:09 ` Daniel Phillips
2004-02-22 10:37 ` Lars Marowsky-Bree
2004-02-24 18:26 ` Daniel Phillips
2004-02-18 12:12 ` Non-GPL export of invalidate_mmap_range Dominik Kubla
2004-02-18 12:12 ` Dominik Kubla
[not found] ` <24651326.1077037044@42.150.104.212.access.eclipse.net.uk>
2004-02-18 13:13 ` Christoph Hellwig
2004-02-17 22:22 ` David Weinehall
2004-02-17 22:22 ` David Weinehall
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