From: Manfred Spraul <manfred@colorfullife.com>
To: linux-kernel@vger.kernel.org, Andrew Morton <akpm@digeo.com>
Subject: Re: Calculating kernel logical address ..
Date: Mon, 09 Sep 2002 23:19:25 +0200 [thread overview]
Message-ID: <3D7D105D.7050604@colorfullife.com> (raw)
Andrew Morton wrote:
> Nobody seems to have come forth to implement a thought-out scatter/gather,
> map-user-pages library infrastructure so I'd be a bit reluctant to
> break stuff without offering a replacement.
>
We'd need one.
get_user_pages() is broken if a kernel module access the virtual address
of the page and the cpu caches are not coherent:
Most of the flush functions need the vma pointer, but it's impossible to
guarantee that it still exists when the get_user_pages() user calls
page_cache_release().
--
Manfred
next reply other threads:[~2002-09-09 21:14 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-09-09 21:19 Manfred Spraul [this message]
2002-09-09 21:47 ` Calculating kernel logical address Andrew Morton
2002-09-10 17:01 ` Manfred Spraul
-- strict thread matches above, loose matches on Subject: below --
2002-09-09 21:02 Manfred Spraul
2002-09-09 21:07 ` Imran Badr
2002-09-09 17:06 Imran Badr
2002-09-09 17:29 ` Richard B. Johnson
2002-09-09 17:23 ` David S. Miller
2002-09-09 17:34 ` Martin J. Bligh
2002-09-09 17:40 ` Daniel Phillips
2002-09-09 17:31 ` Imran Badr
2002-09-09 18:00 ` Richard B. Johnson
2002-09-09 18:12 ` Imran Badr
2002-09-09 18:27 ` Daniel Phillips
2002-09-09 18:41 ` Imran Badr
2002-09-09 21:55 ` Alan Cox
2002-09-09 22:52 ` Imran Badr
2002-09-09 23:09 ` Alan Cox
2002-09-09 18:13 ` Jesse Barnes
2002-09-09 18:25 ` Daniel Phillips
2002-09-09 19:40 ` Andrew Morton
2002-09-09 20:41 ` Daniel Phillips
2002-09-10 6:43 ` Jens Axboe
2002-09-10 7:12 ` Andrew Morton
2002-09-09 18:42 ` Andrew Morton
2002-09-10 7:03 ` Gerd Knorr
2002-09-09 18:16 ` Kurt Ferreira
2002-09-09 18:17 ` David S. Miller
2002-09-09 18:17 ` Daniel Phillips
2002-09-09 18:43 ` Richard B. Johnson
2002-09-09 18:50 ` Daniel Phillips
2002-09-09 18:57 ` Richard B. Johnson
2002-09-09 18:08 ` Andrew Morton
2002-09-09 18:23 ` Daniel Phillips
2002-09-09 18:49 ` Imran Badr
2002-09-09 18:46 ` David S. Miller
2002-09-09 19:06 ` Daniel Phillips
2002-09-09 19:14 ` Andrew Morton
2002-09-09 19:23 ` Imran Badr
2002-09-06 15:44 Manfred Spraul
2002-09-06 17:13 ` Imran Badr
2002-09-07 1:57 ` Daniel Phillips
2002-09-06 3:23 side-by-side Re: BYTE Unix Benchmarks Version 3.6 Daniel Phillips
2002-09-06 3:34 ` Calculating kernel logical address Imran Badr
2002-09-07 1:44 ` Daniel Phillips
2002-09-08 0:01 ` David S. Miller
2002-09-08 18:44 ` Daniel Phillips
2002-09-09 5:00 ` David S. Miller
2002-09-09 5:17 ` Daniel Phillips
2002-09-09 5:28 ` David S. Miller
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