From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: michael@ellerman.id.au
Cc: benh@kernel.crashing.org, Matthew Wilcox <matthew@wil.cx>,
Arnd Bergmann <arnd@arndb.de>,
linux-pci@vger.kernel.org,
Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>,
Ingo Molnar <mingo@elte.hu>, Thomas Gleixner <tglx@linutronix.de>,
David Miller <davem@davemloft.net>,
Dan Williams <dan.j.williams@intel.com>,
Martine.Silbermann@hp.com, linux-kernel@vger.kernel.org
Subject: Re: Multiple MSI
Date: Fri, 4 Jul 2008 09:08:03 +0100 [thread overview]
Message-ID: <20080704090803.545d52be@lxorguk.ukuu.org.uk> (raw)
In-Reply-To: <1215136324.7849.9.camel@localhost>
> In most cases that I can see the conversion from irq number to irq_desc
> is done in the genirq code, so I don't see why you couldn't just put a
> remapping in there from irq numbers to descs that doesn't use an array.
> But maybe I'm missing something.
There are a pile of drivers you would also need to fix up that use NR_IRQ
sized tables. There is also the performance concern. The irq->desc
conversion has to be very fast.
It would be better (IMHO) if dev->irq and irq in general was a pointer
whose number for end users was irq->num or similar.
next prev parent reply other threads:[~2008-07-04 8:26 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-07-03 2:44 Matthew Wilcox
2008-07-03 3:24 ` Benjamin Herrenschmidt
2008-07-03 3:59 ` Matthew Wilcox
2008-07-03 4:41 ` Benjamin Herrenschmidt
2008-07-03 6:44 ` Michael Ellerman
2008-07-03 9:10 ` Arnd Bergmann
2008-07-03 9:17 ` Benjamin Herrenschmidt
2008-07-03 11:31 ` Matthew Wilcox
2008-07-03 11:41 ` Benjamin Herrenschmidt
2008-07-04 1:52 ` Michael Ellerman
2008-07-04 8:08 ` Alan Cox [this message]
2008-07-03 11:34 ` Matthew Wilcox
2008-07-07 16:17 ` Grant Grundler
2008-07-07 16:39 ` Matthew Wilcox
2008-07-07 16:51 ` Grant Grundler
2008-07-07 23:06 ` Benjamin Herrenschmidt
2008-07-10 0:55 ` Michael Ellerman
2008-07-05 13:27 ` Matthew Wilcox
2008-07-05 13:34 ` [PATCH 1/4] PCI MSI: Store the number of messages in the msi_desc Matthew Wilcox
2008-07-07 2:05 ` Michael Ellerman
2008-07-07 2:41 ` Matthew Wilcox
2008-07-07 3:26 ` Benjamin Herrenschmidt
2008-07-07 3:48 ` Michael Ellerman
2008-07-07 12:04 ` Matthew Wilcox
2008-07-07 16:02 ` Grant Grundler
2008-07-07 16:19 ` Matthew Wilcox
2008-07-10 1:32 ` Michael Ellerman
2008-07-10 1:35 ` Matthew Wilcox
2008-07-05 13:34 ` [PATCH 2/4] PCI: Support multiple MSI Matthew Wilcox
2008-07-07 2:05 ` Michael Ellerman
2008-07-07 2:45 ` Matthew Wilcox
2008-07-07 3:56 ` Michael Ellerman
2008-07-07 11:31 ` Matthew Wilcox
2008-07-10 1:32 ` Michael Ellerman
2008-07-10 1:43 ` Matthew Wilcox
2008-07-10 4:00 ` Michael Ellerman
2008-07-05 13:34 ` [PATCH 3/4] AHCI: Request multiple MSIs Matthew Wilcox
2008-07-07 16:45 ` Grant Grundler
2008-07-07 17:48 ` Matthew Wilcox
2008-07-20 7:49 ` Grant Grundler
2008-07-05 13:34 ` [PATCH 4/4] x86-64: Support for " Matthew Wilcox
2008-07-05 13:43 ` Multiple MSI Matthew Wilcox
2008-07-05 22:38 ` Matthew Wilcox
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20080704090803.545d52be@lxorguk.ukuu.org.uk \
--to=alan@lxorguk.ukuu.org.uk \
--cc=Martine.Silbermann@hp.com \
--cc=arnd@arndb.de \
--cc=benh@kernel.crashing.org \
--cc=dan.j.williams@intel.com \
--cc=davem@davemloft.net \
--cc=kaneshige.kenji@jp.fujitsu.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-pci@vger.kernel.org \
--cc=matthew@wil.cx \
--cc=michael@ellerman.id.au \
--cc=mingo@elte.hu \
--cc=tglx@linutronix.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
all inboxes | Powered by JetHome®