From: "Keith Chew" <keith.chew@gmail.com>
To: "James Courtier-Dutton" <James@superbug.co.uk>
Cc: linux-kernel@vger.kernel.org
Subject: Re: IO APIC IRQ assignment
Date: Wed, 31 May 2006 01:26:50 +1200 [thread overview]
Message-ID: <20f65d530605300626q33b420bfn1536aee2ce83b46c@mail.gmail.com> (raw)
In-Reply-To: <447C3B3D.10705@superbug.co.uk>
>
> You could try enabling "Bus Options" ->
> [*] Message Signaled Interrupts (MSI and MSI-X)
>
> or in .config
> CONFIG_PCI_MSI=y
>
> It only works for PCI devices.
>
Yes, the 2 devices are PCI devices. We tried enabling CONFIG_PCI_MSI,
also tried pci=routeirq, but cat /proc/interrupts still show the
devices sharing the same IRQ. It is interesting how each of these
options (ie routeirq, CONFIG_PCI_MSI, noacpi, etc) causes the kernel
to assign a different IRQ each time, but the 2 devices are always
shared, eg
pci=noacpi -> 169: 5140 IO-APIC-level bttv0, uhci_hcd:usb1
pci=routeirq -> 153: 1253 IO-APIC-level bttv0, uhci_hcd:usb1
I guess there's no workaround for our problem. If there are any more
suggestions, please let me know, we hope the pci latency settings will
get us going for now.
Regards
Keith
next prev parent reply other threads:[~2006-05-30 13:26 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-05-30 12:21 Keith Chew
2006-05-30 12:31 ` James Courtier-Dutton
2006-05-30 13:26 ` Keith Chew [this message]
2006-05-30 13:50 ` Erik Mouw
2006-05-30 14:05 ` Keith Chew
2006-05-31 22:03 ` Jan Engelhardt
2006-05-31 23:12 ` Keith Chew
2006-06-01 9:42 ` Erik Mouw
2006-06-01 10:38 ` Keith Chew
2006-06-01 15:35 ` Keith Chew
2006-06-01 15:58 ` Thiago Galesi
2006-06-01 21:27 ` Keith Chew
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