From: Matthew Wilcox <matthew@wil.cx>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Greg KH <gregkh@suse.de>, Arjan van de Ven <arjan@infradead.org>,
Greg KH <greg@kroah.com>,
linux-kernel@vger.kernel.org, Jeff Garzik <jeff@garzik.org>,
linux-pci@atrey.karlin.mff.cuni.cz,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Martin Mares <mj@ucw.cz>
Subject: Re: [Patch v2] Make PCI extended config space (MMCONFIG) a driver opt-in
Date: Fri, 11 Jan 2008 13:17:16 -0700 [thread overview]
Message-ID: <20080111201716.GO18741@parisc-linux.org> (raw)
In-Reply-To: <alpine.LFD.1.00.0801111156230.3148@woody.linux-foundation.org>
On Fri, Jan 11, 2008 at 11:58:23AM -0800, Linus Torvalds wrote:
> On Fri, 11 Jan 2008, Matthew Wilcox wrote:
> >
> > So your argument is that MMCONFIG sucks, therefore Linux has to have a
> > horrible interface to extended PCI config space?
>
> What's *your* point?
>
> MMCONFIG is known broken. If we ever start enabling it more (ie start
> using it even if it's not reserved in the e820 tables), all that known
> breakage will come and bite us in the *ss.
Ivan's patch doesn't start enabling MMCONFIG in more places than we
currently do. It makes us use conf1 accesses for all accesses below
256 bytes. That fixes all known problems to date.
> We need to have some armor-plated underwear to protect against that
> ass-biting, and that's what Arjan's patch is.
>
> Tell me what *other* armor plating you could have that actually works?
The armour plating that already exists -- pci=nommconf.
--
Intel are signing my paycheques ... these opinions are still mine
"Bill, look, we understand that you're interested in selling us this
operating system, but compare it to ours. We can't possibly take such
a retrograde step."
next prev parent reply other threads:[~2008-01-11 20:17 UTC|newest]
Thread overview: 156+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-12-25 11:26 [Patch v2] Make PCI extended config space (MMCONFIG) a driver opt-in Arjan van de Ven
2007-12-27 11:52 ` Jeff Garzik
2007-12-27 14:09 ` Arjan van de Ven
2007-12-27 17:52 ` Linus Torvalds
2008-01-11 19:02 ` Greg KH
2008-01-11 19:09 ` Arjan van de Ven
2008-01-11 19:14 ` Greg KH
2008-01-11 19:28 ` Matthew Wilcox
2008-01-11 19:40 ` Arjan van de Ven
2008-01-11 19:45 ` Greg KH
2008-01-11 19:49 ` Matthew Wilcox
2008-01-11 19:58 ` Linus Torvalds
2008-01-11 20:17 ` Matthew Wilcox [this message]
2008-01-11 20:27 ` Linus Torvalds
2008-01-11 20:42 ` Matthew Wilcox
2008-01-11 21:12 ` Linus Torvalds
2008-01-11 21:17 ` Matthew Wilcox
2008-01-11 21:28 ` Linus Torvalds
2008-01-11 21:38 ` Matthew Wilcox
2008-01-11 23:58 ` Ivan Kokshaysky
2008-01-12 0:17 ` Jesse Barnes
2008-01-12 0:26 ` Greg KH
2008-01-12 14:40 ` Ivan Kokshaysky
2008-01-12 15:46 ` Arjan van de Ven
2008-01-12 16:23 ` Ivan Kokshaysky
2008-01-12 17:45 ` Arjan van de Ven
2008-01-12 18:17 ` Matthew Wilcox
2008-01-12 21:49 ` Ivan Kokshaysky
2008-01-12 23:01 ` Arjan van de Ven
2008-01-13 0:12 ` Tony Camuso
2008-01-13 0:40 ` Arjan van de Ven
2008-01-13 1:36 ` Tony Camuso
2008-01-13 4:42 ` Arjan van de Ven
2008-01-13 4:47 ` Matthew Wilcox
2008-01-13 6:43 ` Jeff Garzik
2008-01-13 12:43 ` Tony Camuso
2008-01-13 17:03 ` Arjan van de Ven
2008-01-13 21:28 ` Tony Camuso
2008-01-14 0:54 ` Alan Cox
2008-01-14 1:33 ` Arjan van de Ven
2008-01-14 3:29 ` Tony Camuso
2008-01-14 5:05 ` Arjan van de Ven
2008-01-14 13:01 ` Tony Camuso
2008-01-14 14:46 ` Arjan van de Ven
2008-01-14 15:23 ` Tony Camuso
2008-01-14 16:01 ` Arjan van de Ven
2008-01-14 16:08 ` Tony Camuso
2008-01-14 9:11 ` Alan Cox
2008-01-14 5:20 ` Linus Torvalds
2008-01-13 18:23 ` Loic Prylli
2008-01-13 18:41 ` Arjan van de Ven
2008-01-13 20:43 ` Matthew Wilcox
2008-01-13 21:18 ` Loic Prylli
2008-01-13 20:51 ` Loic Prylli
2008-01-13 7:08 ` Benjamin Herrenschmidt
2008-01-13 7:24 ` Matthew Wilcox
2008-01-13 7:58 ` Matthew Wilcox
2008-01-13 17:01 ` Arjan van de Ven
2008-01-14 22:52 ` Matthew Wilcox
2008-01-14 23:04 ` Adrian Bunk
2008-01-15 16:00 ` Loic Prylli
2008-01-15 17:46 ` Greg KH
2008-01-15 17:56 ` Matthew Wilcox
2008-01-15 19:27 ` Tony Camuso
2008-01-15 19:38 ` Linus Torvalds
2008-01-15 19:40 ` Matthew Wilcox
2008-01-15 22:12 ` Loic Prylli
2008-01-19 16:58 ` Grant Grundler
2008-01-28 18:32 ` Tony Camuso
2008-01-28 20:44 ` Greg KH
2008-01-28 22:31 ` Matthew Wilcox
2008-01-28 22:53 ` Greg KH
2008-01-29 2:56 ` Matthew Wilcox
2008-01-29 2:57 ` PCI x86: always use conf1 to access config space below 256 bytes Matthew Wilcox
2008-01-29 13:21 ` Greg KH
2008-01-29 23:43 ` Matthew Wilcox
2008-01-30 0:04 ` Linus Torvalds
2008-01-29 3:03 ` [PATCH] Change pci_raw_ops to pci_raw_read/write Matthew Wilcox
2008-02-03 7:30 ` Yinghai Lu
2008-02-07 15:54 ` Tony Camuso
2008-02-07 16:28 ` Arjan van de Ven
2008-02-07 16:36 ` Tony Camuso
2008-02-08 2:28 ` Grant Grundler
2008-02-09 12:41 ` Matthew Wilcox
2008-02-10 6:25 ` Yinghai Lu
2008-02-10 7:21 ` Greg KH
2008-02-10 14:51 ` Matthew Wilcox
2008-02-10 19:13 ` Grant Grundler
2008-02-10 19:37 ` Matthew Wilcox
2008-02-10 20:16 ` Yinghai Lu
2008-02-10 20:19 ` Matthew Wilcox
2008-02-10 20:25 ` Yinghai Lu
2008-02-10 20:32 ` Matthew Wilcox
2008-02-10 20:47 ` Yinghai Lu
2008-02-10 20:24 ` Linus Torvalds
2008-02-10 20:45 ` Matthew Wilcox
2008-02-10 23:02 ` raw_pci_read in quirk_intel_irqbalance Matthew Wilcox
2008-02-11 5:04 ` Matthew Wilcox
2008-02-11 7:49 ` Grant Grundler
2008-02-11 16:15 ` Matthew Wilcox
2008-02-11 17:18 ` Linus Torvalds
2008-02-11 19:38 ` Grant Grundler
2008-02-11 1:49 ` [PATCH] Change pci_raw_ops to pci_raw_read/write Yinghai Lu
2008-02-11 2:53 ` Robert Hancock
2008-02-11 5:59 ` Yinghai Lu
2008-02-11 22:10 ` Andrew Morton
2008-02-11 22:38 ` Ingo Molnar
2008-01-29 3:05 ` [Patch v2] Make PCI extended config space (MMCONFIG) a driver opt-in Arjan van de Ven
2008-01-29 3:18 ` Matthew Wilcox
2008-01-29 13:19 ` Greg KH
2008-01-29 14:15 ` Tony Camuso
2008-01-29 14:47 ` Arjan van de Ven
2008-01-29 15:15 ` Tony Camuso
2008-01-29 15:29 ` Arjan van de Ven
2008-01-29 16:26 ` Tony Camuso
2008-01-29 23:57 ` Matthew Wilcox
2008-01-30 2:30 ` Tony Camuso
2008-01-30 3:45 ` Matthew Wilcox
2008-01-30 15:15 ` Ivan Kokshaysky
2008-01-30 15:42 ` Arjan van de Ven
2008-01-30 20:14 ` Ivan Kokshaysky
2008-01-31 5:51 ` Jesse Barnes
2008-01-11 19:54 ` Arjan van de Ven
2008-01-11 20:55 ` Greg KH
2008-01-15 12:58 ` Øyvind Vågen Jægtnes
[not found] <fa.m7tRTz/ymu3iMyLTO2aF1Tvaw24@ifi.uio.no>
[not found] ` <fa.XrRLIuL4juNAXXaMPF3iY8FyWW8@ifi.uio.no>
[not found] ` <fa.gv3MUHxQvd7EaG/0hhC9IzBvIlA@ifi.uio.no>
2007-12-27 17:59 ` Robert Hancock
2007-12-27 19:47 ` Arjan van de Ven
[not found] ` <fa.H0fcNl3b6xVBwzWUgT72M4K6KOU@ifi.uio.no>
2007-12-27 18:15 ` Robert Hancock
2007-12-27 18:30 ` Kai Ruhnau
2007-12-27 18:58 ` Linus Torvalds
2007-12-27 21:10 ` Loic Prylli
2007-12-27 21:21 ` Matthew Wilcox
2007-12-27 21:37 ` Linus Torvalds
2007-12-27 21:46 ` Linus Torvalds
2007-12-27 22:18 ` Kai Ruhnau
2007-12-28 4:27 ` Daniel Barkalow
2007-12-28 5:32 ` Linus Torvalds
2007-12-28 6:07 ` Daniel Barkalow
2007-12-28 10:34 ` Ivan Kokshaysky
2007-12-28 16:14 ` Arjan van de Ven
2007-12-28 16:38 ` Ivan Kokshaysky
2007-12-28 17:40 ` Loic Prylli
2007-12-28 21:12 ` Ivan Kokshaysky
2008-01-13 6:01 ` Matthew Wilcox
2008-01-13 7:19 ` Loic Prylli
2007-12-28 5:31 ` Benjamin Herrenschmidt
2007-12-27 21:59 ` Kai Ruhnau
2007-12-28 5:27 ` Benjamin Herrenschmidt
2007-12-28 5:29 ` Benjamin Herrenschmidt
2007-12-28 5:37 ` Linus Torvalds
2007-12-28 6:06 ` Benjamin Herrenschmidt
2007-12-28 19:14 ` Loic Prylli
2007-12-28 20:42 ` Benjamin Herrenschmidt
2007-12-28 0:18 ` Robert Hancock
[not found] <fa.2KorSXroIUtdRjFJWJwy49QuIYk@ifi.uio.no>
[not found] ` <fa.KgDY4hzBogAL+o607R+LHzW+HTc@ifi.uio.no>
[not found] ` <fa.xzH/eH5b6vCHpOD31Cq2nyq6z/k@ifi.uio.no>
[not found] ` <fa.EPUIDYIoxtDNcRrL9p3fAkr80Lo@ifi.uio.no>
[not found] ` <fa.uPoC9dcdekzy7g8QYFyuwelukiQ@ifi.uio.no>
[not found] ` <fa.O9WUKjAu+MfGg712w8Y4HkQ7GIo@ifi.uio.no>
2008-01-13 1:56 ` Robert Hancock
[not found] ` <fa.y9bLGEm23C6rL/wz7kMpKYF67oM@ifi.uio.no>
[not found] ` <fa.S+otiE5kNySVMlhUagdf/n9GRIc@ifi.uio.no>
[not found] ` <fa.OH5C/OjPYJXn8kSOHV/09piVz0E@ifi.uio.no>
[not found] ` <fa.jj0GkdAagaR3CLapBSdT1psD3Ps@ifi.uio.no>
[not found] ` <fa.EgRiN/duILxBcenHk7dQyC+rldw@ifi.uio.no>
2008-01-14 23:59 ` Robert Hancock
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