From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Loic Prylli <loic@myri.com>, Robert Hancock <hancockr@shaw.ca>,
Jeff Garzik <jeff@garzik.org>,
Arjan van de Ven <arjan@infradead.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
gregkh@suse.de, linux-pci <linux-pci@atrey.karlin.mff.cuni.cz>,
Martin Mares <mj@ucw.cz>, Matthew Wilcox <matthew@wil.cx>,
Kai Ruhnau <kai@tragetaschen.dyndns.org>
Subject: Re: [Patch v2] Make PCI extended config space (MMCONFIG) a driver opt-in
Date: Fri, 28 Dec 2007 17:06:50 +1100 [thread overview]
Message-ID: <1198822010.7209.32.camel@pasglop> (raw)
In-Reply-To: <alpine.LFD.0.9999.0712272135270.21557@woody.linux-foundation.org>
On Thu, 2007-12-27 at 21:37 -0800, Linus Torvalds wrote:
>
> On Fri, 28 Dec 2007, Benjamin Herrenschmidt wrote:
> >
> > I have embedded boards where proper CRS operations is critical since the
> > kernel brings the PCIe link up itself, and thus is likely to hit devices
> > still in the middle of CRS.
>
> .. but that's perfectly fine. A PCI-E bridge will certainly retry it in
> hardware (or it isn't a PCI-E bridge!).
Only a handful of times in many bridges I've seen.
> So I'm going to disable that thing. If there is some _other_ PCI-E bridge
> that is simply buggy, and cannot handle the hw retry itself or is just
> otherwise dodgy, we can have a white-list for cases where it really needs
> to be done, but the current code is just bogus.
If you disable it, then isn't there also a problem with PCIE->PCI-X
bridge which will stop issuing CRS when they should ? (not sure here, I
may be a bit confused).
Ben.
next prev parent reply other threads:[~2007-12-28 6:08 UTC|newest]
Thread overview: 122+ messages / expand[flat|nested] mbox.gz Atom feed top
[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 ` [Patch v2] Make PCI extended config space (MMCONFIG) a driver opt-in 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 [this message]
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
2007-12-25 11:26 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
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 3:05 ` 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
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