From: Michal Schmidt <mschmidt@redhat.com>
To: Matthew Wilcox <matthew@wil.cx>
Cc: Jesse Barnes <jbarnes@virtuousgeek.org>,
David Vrabel <david.vrabel@csr.com>,
linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: PCI: MSI interrupts masked using prohibited method
Date: Mon, 28 Jul 2008 11:54:12 +0200 [thread overview]
Message-ID: <20080728115412.75397898@brian.englab.brq.redhat.com> (raw)
In-Reply-To: <20080725155146.GB17093@parisc-linux.org>
On Fri, 25 Jul 2008 09:51:46 -0600
Matthew Wilcox <matthew@wil.cx> wrote:
> On Fri, Jul 25, 2008 at 03:53:29PM +0200, Michal Schmidt wrote:
> > Maybe we should just not use MSI for devices without maskbits.
>
> That seems excessive. I wouldn't object to forbidding CPU affinity
> changes for devices:
>
> - Without maskbits
> - With the intx quirk
>
> I'd want to look into it in a bit more detail .... perhaps we could
> allow irq affinity if we don't have to change the address, only the
> data.
At least on x86, the destination processor is encoded in the message
address (see Intel Architecture Software Developer's Manual Vol. 3A,
9.11.1), so it won't help.
Michal
next prev parent reply other threads:[~2008-07-28 9:54 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-06-24 10:46 David Vrabel
2008-06-25 21:20 ` Jesse Barnes
2008-06-27 12:17 ` David Vrabel
2008-06-27 17:07 ` Jesse Barnes
2008-07-16 19:43 ` Jesse Barnes
2008-07-16 19:58 ` Matthew Wilcox
2008-07-16 20:35 ` David Miller
2008-07-17 12:16 ` Krzysztof Halasa
2008-07-17 12:43 ` Matthew Wilcox
2008-07-17 13:14 ` David Vrabel
2008-07-17 15:39 ` Matthew Wilcox
2008-07-17 15:58 ` Thomas Gleixner
2008-07-17 16:11 ` Matthew Wilcox
2008-07-17 17:04 ` Thomas Gleixner
2008-07-17 16:56 ` Matthew Wilcox
[not found] ` <487F7DFA.10101@csr.com>
2008-07-17 19:48 ` Matthew Wilcox
2008-07-18 10:33 ` David Vrabel
2008-07-22 13:56 ` Michal Schmidt
2008-07-22 17:52 ` Jesse Barnes
2008-07-23 13:02 ` Michal Schmidt
2008-07-25 13:29 ` Michal Schmidt
2008-07-25 13:42 ` Matthew Wilcox
2008-07-25 13:53 ` Michal Schmidt
2008-07-25 15:51 ` Matthew Wilcox
2008-07-28 9:54 ` Michal Schmidt [this message]
2008-07-25 16:37 ` David Vrabel
2008-07-25 16:56 ` Matthew Wilcox
2008-07-25 19:12 ` Jesse Barnes
2008-07-28 9:59 ` Michal Schmidt
2008-07-28 22:04 ` Jesse Barnes
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