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From: Grant Grundler <grundler@parisc-linux.org>
To: Matthew Wilcox <willy@debian.org>
Cc: PARISC list <parisc-linux@lists.parisc-linux.org>
Subject: Re: [parisc-linux] Proposal for implementing IRQ affinity
Date: Tue, 31 Aug 2004 13:48:37 -0600	[thread overview]
Message-ID: <20040831194837.GA24477@colo.lackof.org> (raw)
In-Reply-To: <20040831192811.GB642@parcelfarce.linux.theplanet.co.uk>

On Tue, Aug 31, 2004 at 08:28:11PM +0100, Matthew Wilcox wrote:
> So PA-RISC supports ISA and ia64 doesn't :-P

yes, thanks for the correction. You are right.
I was staring at arch/ia64/kernel/iosapic.c...only it has ISA support.

> > Seriously, what problem does LASI bring that can't be handled with
> > a global array?
> 
> The subdevices that can't have their own processor interrupt.

That has nothing to do with using a global IRQ array.
It just means LASI subdevices can't be redirected individually.
They will still be assigned a global IRQ number.
PCI devices using IRQ lines below DINO will have the same problem.
Ditto for E/ISA support under WAX.

thanks for the correction,
grant
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  reply	other threads:[~2004-08-31 19:48 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2004-08-31  3:31 [parisc-linux] Proposal for implementing IRQ affinity James Bottomley
2004-08-31 15:13 ` Bjorn Helgaas
2004-08-31 17:29   ` James Bottomley
2004-08-31 17:43     ` Bjorn Helgaas
2004-08-31 17:14 ` Grant Grundler
2004-08-31 17:43   ` Matthew Wilcox
2004-08-31 18:06     ` Grant Grundler
     [not found]       ` <20040831185750.GS16196@parcelfarce.linux.theplanet.co.uk>
2004-08-31 19:21         ` Grant Grundler
2004-08-31 19:28           ` Matthew Wilcox
2004-08-31 19:48             ` Grant Grundler [this message]
2004-08-31 21:26             ` Michael S. Zick
2004-08-31 22:19               ` Matthew Wilcox
2004-08-31 17:49   ` James Bottomley
2004-08-31 18:34     ` Grant Grundler
2004-08-31 19:44       ` James Bottomley
2004-08-31 20:21         ` Grant Grundler

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