From: "H. Peter Anvin" <hpa@zytor.com>
To: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: James Bottomley <James.Bottomley@HansenPartnership.com>,
Yinghai Lu <yhlu.kernel@gmail.com>,
Alan Cox <alan@lxorguk.ukuu.org.uk>,
Jesse Barnes <jbarnes@virtuousgeek.org>,
Ingo Molnar <mingo@elte.hu>, Thomas Gleixner <tglx@linutronix.de>,
Andrew Morton <akpm@linux-foundation.org>,
linux-kernel@vger.kernel.org,
Andrew Vasquez <andrew.vasquez@qlogic.com>
Subject: Re: [PATCH] pci: change msi-x vector to 32bit
Date: Mon, 18 Aug 2008 14:24:41 -0700 [thread overview]
Message-ID: <48A9E899.8000303@zytor.com> (raw)
In-Reply-To: <m14p5i2iwx.fsf@frodo.ebiederm.org>
Eric W. Biederman wrote:
>
> I believe assign_irq_vector on x86_64 and soon on x86_32 does this already.
>
> The number that was being changed was the irq number of for the
> msi-x ``vectors'' from some random free irq number to roughly
> bus(8 bits):device+function(8 bits):msix-vector(12 bits) so that we
> could have a stable irq number for msi irqs.
>
> Once pci domain is considered it is hard to claim we have enough bits.
> I expect we need at least pci domains to have one per NUMA node, in
> the general case.
>
[...]
>
> So once we have all of that. It becomes possible to look at assigning a static
> irq number to each pci (bus:device:function:msi-x vector) pair so the system
> is more reproducible.
>
Domain, again?
-hpa
next prev parent reply other threads:[~2008-08-18 21:25 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-08-16 3:26 [PATCH] pci: change msi-x vector to 32bit H. Peter Anvin
2008-08-16 6:42 ` Yinghai Lu
2008-08-16 14:50 ` James Bottomley
2008-08-16 15:39 ` Alan Cox
2008-08-16 16:13 ` James Bottomley
2008-08-16 18:56 ` Yinghai Lu
2008-08-16 20:10 ` Andrew Vasquez
2008-08-16 20:25 ` James Bottomley
2008-08-16 20:34 ` Yinghai Lu
2008-08-16 20:45 ` James Bottomley
2008-08-16 22:17 ` Yinghai Lu
2008-08-16 23:09 ` James Bottomley
2008-08-16 23:21 ` Yinghai Lu
2008-08-18 19:59 ` Eric W. Biederman
2008-08-18 20:59 ` James Bottomley
2008-08-18 21:45 ` Eric W. Biederman
2008-08-18 22:04 ` James Bottomley
2008-08-18 21:51 ` Alan Cox
2008-08-18 22:13 ` H. Peter Anvin
2008-08-18 22:27 ` James Bottomley
2008-08-18 21:24 ` H. Peter Anvin [this message]
2008-08-16 8:17 ` Eric W. Biederman
2008-08-16 9:00 ` Yinghai Lu
-- strict thread matches above, loose matches on Subject: below --
2008-08-16 2:36 Yinghai Lu
2008-08-21 20:33 ` Jesse Barnes
2008-08-21 20:47 ` Eric W. Biederman
2008-08-21 23:07 ` Jesse Barnes
2008-08-22 0:11 ` Eric W. Biederman
2008-08-22 0:35 ` Jesse Barnes
2008-08-27 23:34 ` Jesse Barnes
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=48A9E899.8000303@zytor.com \
--to=hpa@zytor.com \
--cc=James.Bottomley@HansenPartnership.com \
--cc=akpm@linux-foundation.org \
--cc=alan@lxorguk.ukuu.org.uk \
--cc=andrew.vasquez@qlogic.com \
--cc=ebiederm@xmission.com \
--cc=jbarnes@virtuousgeek.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@elte.hu \
--cc=tglx@linutronix.de \
--cc=yhlu.kernel@gmail.com \
/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