From: bert hubert <bert.hubert@netherlabs.nl>
To: Linus Torvalds <torvalds@osdl.org>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>,
Aubrey <aubreylee@gmail.com>, Hua Zhong <hzhong@gmail.com>,
Hugh Dickins <hugh@veritas.com>,
linux-kernel@vger.kernel.org, hch@infradead.org,
kenneth.w.chen@intel.com, akpm@osdl.org, mjt@tls.msk.ru
Subject: Re: O_DIRECT question
Date: Thu, 11 Jan 2007 17:23:51 +0100 [thread overview]
Message-ID: <20070111162351.GA16091@outpost.ds9a.nl> (raw)
In-Reply-To: <Pine.LNX.4.64.0701110746360.3594@woody.osdl.org>
On Thu, Jan 11, 2007 at 07:50:26AM -0800, Linus Torvalds wrote:
> Yes. O_DIRECT is really fundamentally broken. There's just no way to fix
> it sanely. Except by teaching people not to use it, and making the normal
Does this mean that it will eat data today? Or that it is broken because it
requires heaps of work on the kernel side?
If it will eat data, when? What are the issues, cache coherency?
I understand what you say about O_DIRECT, but considering that it is seeing
use today, it would be good to know the extent of the practical problems.
Thanks.
--
http://www.PowerDNS.com Open source, database driven DNS Software
http://netherlabs.nl Open and Closed source services
next prev parent reply other threads:[~2007-01-11 16:23 UTC|newest]
Thread overview: 130+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-01-11 2:57 O_DIRECT question Aubrey
2007-01-11 3:05 ` Linus Torvalds
2007-01-11 3:15 ` Linus Torvalds
2007-01-11 6:09 ` Nick Piggin
2007-01-11 15:50 ` Linus Torvalds
2007-01-11 16:19 ` Aubrey
2007-01-16 3:41 ` Jörn Engel
2007-01-11 16:23 ` bert hubert [this message]
2007-01-11 16:52 ` Xavier Bestel
2007-01-11 17:04 ` Linus Torvalds
2007-01-11 18:41 ` Trond Myklebust
2007-01-11 19:00 ` Linus Torvalds
2007-01-11 19:49 ` Trond Myklebust
2007-01-12 17:03 ` Viktor
2007-01-20 16:19 ` Denis Vlasenko
2007-01-22 15:52 ` Phillip Susi
2007-01-11 5:50 ` Aubrey
2007-01-11 6:06 ` Andrew Morton
2007-01-11 6:45 ` Aubrey
2007-01-11 6:57 ` Andrew Morton
2007-01-11 7:05 ` Nick Piggin
2007-01-11 7:54 ` Aubrey
2007-01-11 8:05 ` Roy Huang
2007-01-11 16:45 ` Linus Torvalds
2007-01-17 4:29 ` Aubrey Li
2007-01-12 2:12 ` Aubrey
2007-01-12 2:47 ` Nick Piggin
2007-01-12 3:59 ` Roy Huang
2007-01-11 8:12 ` Nick Piggin
2007-01-11 8:49 ` Roy Huang
2007-01-11 9:09 ` Nick Piggin
2007-01-12 2:48 ` Bill Davidsen
2007-01-12 4:30 ` Nick Piggin
2007-01-12 4:46 ` Linus Torvalds
2007-01-12 4:56 ` Nick Piggin
2007-01-12 4:58 ` Nick Piggin
2007-01-12 5:18 ` Linus Torvalds
2007-01-12 5:22 ` Aubrey
2007-01-12 14:59 ` Bill Davidsen
2007-01-13 4:51 ` Nick Piggin
2007-01-11 6:16 ` Alexander Shishkin
2007-01-11 6:57 ` Aubrey
2007-01-11 12:13 ` Viktor
2007-01-11 15:53 ` Phillip Susi
2007-01-11 16:20 ` Linus Torvalds
2007-01-11 17:13 ` Michael Tokarev
2007-01-11 23:01 ` Phillip Susi
2007-01-11 23:06 ` Hua Zhong
2007-01-12 15:21 ` Phillip Susi
2007-01-20 16:36 ` Denis Vlasenko
2007-01-20 20:55 ` Michael Tokarev
2007-01-20 23:05 ` Denis Vlasenko
2007-01-21 12:09 ` Michael Tokarev
2007-01-21 20:02 ` Denis Vlasenko
2007-01-22 16:17 ` Phillip Susi
2007-01-24 21:15 ` Denis Vlasenko
2007-01-25 15:44 ` Phillip Susi
2007-01-25 17:38 ` Denis Vlasenko
2007-01-25 19:28 ` Phillip Susi
2007-01-25 19:52 ` Denis Vlasenko
2007-01-25 20:03 ` Phillip Susi
2007-01-25 20:45 ` Michael Tokarev
2007-01-25 21:11 ` Denis Vlasenko
2007-01-26 16:02 ` Mark Lord
2007-01-26 16:52 ` Viktor
2007-01-26 16:58 ` Phillip Susi
2007-01-26 17:05 ` Phillip Susi
2007-01-26 23:16 ` Denis Vlasenko
2007-02-06 20:39 ` Pavel Machek
2007-01-26 18:23 ` Bill Davidsen
2007-01-26 23:35 ` Denis Vlasenko
2007-01-28 15:18 ` Bill Davidsen
2007-01-28 17:03 ` Denis Vlasenko
2007-01-29 15:43 ` Phillip Susi
2007-01-29 17:00 ` Andrea Arcangeli
2007-01-30 0:05 ` Denis Vlasenko
[not found] ` <45BE7D99.70200@cfl.rr.com>
[not found] ` <20070130023056.GN8030@opteron.random>
[not found] ` <45BF65E3.6070102@cfl.rr.com>
[not found] ` <20070130164806.GQ8030@opteron.random>
2007-01-30 18:50 ` Phillip Susi
2007-01-30 19:57 ` Andrea Arcangeli
2007-01-30 20:06 ` Andrea Arcangeli
2007-01-30 23:07 ` Phillip Susi
2007-01-31 2:28 ` Andrea Arcangeli
2007-01-31 9:37 ` Michael Tokarev
2007-01-26 15:53 ` Bill Davidsen
2007-01-11 17:42 ` Alan
2007-01-11 18:00 ` Linus Torvalds
2007-01-12 7:57 ` dean gaudet
2007-01-12 15:27 ` Phillip Susi
2007-01-12 18:06 ` Linus Torvalds
2007-01-12 20:23 ` Chris Mason
2007-01-12 20:46 ` Michael Tokarev
2007-01-12 20:52 ` Michael Tokarev
2007-01-12 21:03 ` Michael Tokarev
2007-01-12 21:17 ` Linus Torvalds
2007-01-12 21:54 ` Michael Tokarev
2007-01-12 22:09 ` Linus Torvalds
2007-01-12 22:26 ` Michael Tokarev
2007-01-12 22:35 ` Erik Andersen
2007-01-12 22:47 ` Andrew Morton
2007-01-14 9:11 ` Nate Diller
2007-01-20 16:45 ` Denis Vlasenko
2007-01-22 1:47 ` Andrea Arcangeli
2007-01-13 20:07 ` Bill Davidsen
2007-01-13 20:27 ` Michael Tokarev
2007-01-14 15:39 ` Bill Davidsen
2007-01-12 21:39 ` Disk Cache, Was: " Zan Lynx
2007-01-12 22:10 ` Michael Tokarev
2007-01-15 12:11 ` Helge Hafting
2007-01-12 16:59 ` Viktor
2007-01-11 12:45 ` Erik Mouw
2007-01-11 4:51 ` Andrew Morton
2007-01-11 5:06 ` Gerrit Huizenga
2007-01-11 16:09 ` Badari Pulavarty
2007-01-11 12:34 ` linux-os (Dick Johnson)
2007-01-11 13:06 ` Martin Mares
2007-01-11 14:15 ` Jens Axboe
2007-01-12 2:13 ` Bill Davidsen
-- strict thread matches above, loose matches on Subject: below --
2007-01-17 14:27 Alex Tomas
2007-01-22 15:59 Al Boldi
[not found] <7BYkO-5OV-17@gated-at.bofh.it>
[not found] ` <7BYul-6gz-5@gated-at.bofh.it>
[not found] ` <7C18X-1zo-5@gated-at.bofh.it>
[not found] ` <7C1iw-22q-7@gated-at.bofh.it>
[not found] ` <7C1Vb-2Ny-3@gated-at.bofh.it>
[not found] ` <7C256-2ZR-27@gated-at.bofh.it>
[not found] ` <7C2eE-3rT-15@gated-at.bofh.it>
[not found] ` <7C31d-4qb-11@gated-at.bofh.it>
[not found] ` <7C3kj-55E-9@gated-at.bofh.it>
2007-01-11 13:20 ` Bodo Eggert
[not found] ` <7C74B-2A4-23@gated-at.bofh.it>
[not found] ` <7CaYA-mT-19@gated-at.bofh.it>
[not found] ` <7Cpuz-64X-1@gated-at.bofh.it>
[not found] ` <7Cz0T-4PH-17@gated-at.bofh.it>
[not found] ` <7CBcl-86B-9@gated-at.bofh.it>
[not found] ` <7CBvH-52-9@gated-at.bofh.it>
[not found] ` <7CBFn-hw-1@gated-at.bofh.it>
[not found] ` <7CBP1-KI-3@gated-at.bofh.it>
[not found] ` <7CBYG-WK-3@gated-at.bofh.it>
2007-01-13 16:53 ` Bodo Eggert
2007-01-13 19:30 ` Bill Davidsen
2007-01-14 18:51 ` Bodo Eggert
[not found] ` <7CXmz-88G-29@gated-at.bofh.it>
[not found] ` <7CXFR-8vZ-15@gated-at.bofh.it>
[not found] ` <7DfMP-2ak-19@gated-at.bofh.it>
2007-01-14 19:39 ` Bodo Eggert
[not found] ` <7DyYK-6lE-3@gated-at.bofh.it>
2007-01-16 20:26 ` Bodo Eggert
2007-01-17 5:55 ` Arjan van de Ven
2007-01-17 22:36 ` Bodo Eggert
[not found] ` <7HkaQ-2Nb-9@gated-at.bofh.it>
[not found] ` <7HDZP-Pv-1@gated-at.bofh.it>
[not found] ` <7HIPV-8kp-35@gated-at.bofh.it>
2007-01-27 14:01 ` Bodo Eggert
2007-01-27 14:14 ` Denis Vlasenko
2007-01-28 15:30 ` Bill Davidsen
2007-01-28 17:18 ` Denis Vlasenko
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