From: Dean Nelson <dcn@sgi.com>
To: "H. Peter Anvin" <hpa@zytor.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>,
Alan Mayer <ajm@sgi.com>, Ingo Molnar <mingo@elte.hu>,
jeremy@goop.org, rusty@rustcorp.com.au,
suresh.b.siddha@intel.com, torvalds@linux-foundation.org,
linux-kernel@vger.kernel.org,
Thomas Gleixner <tglx@linutronix.de>,
Yinghai Lu <Yinghai.lu@amd.com>
Subject: Re: [RFC 0/4] dynamically allocate arch specific system vectors
Date: Fri, 12 Sep 2008 06:46:38 -0500 [thread overview]
Message-ID: <20080912114638.GA2661@sgi.com> (raw)
In-Reply-To: <48C979D3.5000308@zytor.com>
On Thu, Sep 11, 2008 at 01:04:35PM -0700, H. Peter Anvin wrote:
> Dean Nelson wrote:
> >
> >We (SGI) need somewhere around eight vectors.
> >
> >There are two kernel modules, sgi-gru and sgi-xp (in drivers/misc), that
> >each need two vectors. And there's the broadcast assist unit (BAU) that is
> >involved in tlb shootdown on uv, which currently uses statically reserved
> >vector 0xf8 (UV_BAU_MESSAGE -- see uv_bau_init()). I know of a debugger
> >that
> >also uses 0xf8 because it was previously available until UV_BAU_MESSAGE
> >came
> >along. The BAU would be happy with a dynamically allocated system vector.
> >We have a couple of other things in the works that also need vectors.
> >
> >All of these eight or so vectors are only meaningful on SGI uv systems.
> >
>
> Are these kernel-internal vectors, or exposed to userspace (i.e. the INT
> instruction works in userspace)? From what I'm gathering, I think this
> is the former.
Yeah, these are kernel-internal vectors and are not exposed to userspace.
next prev parent reply other threads:[~2008-09-12 11:46 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-08-08 15:37 [Fwd: [PATCH] x86_64: (NEW) Dynamically allocate arch specific system vectors] Alan Mayer
2008-08-11 16:59 ` [PATCH] x86_64: (NEW) Dynamically allocate arch specific system vectors Ingo Molnar
2008-08-11 17:14 ` Alan Mayer
2008-08-11 19:39 ` Eric W. Biederman
2008-08-11 19:51 ` Ingo Molnar
2008-08-11 19:55 ` Jeremy Fitzhardinge
2008-08-11 20:10 ` Eric W. Biederman
2008-08-11 20:02 ` Alan Mayer
2008-09-11 15:23 ` [RFC 0/4] dynamically " Dean Nelson
2008-09-11 15:25 ` [RFC 1/4] switch vector_irq[] from irq number to irq_desc pointer Dean Nelson
2008-09-11 15:27 ` [RFC 2/4] introduce dynamically allocated system vectors Dean Nelson
2008-09-14 15:39 ` Ingo Molnar
2008-09-14 15:46 ` Ingo Molnar
2008-09-11 15:28 ` [RFC 3/4] switch static system vector allocation to use vector_irq[] Dean Nelson
2008-09-11 15:29 ` [RFC 4/4] switch non-standard SYSCALL_VECTOR " Dean Nelson
2008-09-14 15:40 ` Ingo Molnar
2008-09-14 15:42 ` Ingo Molnar
2008-09-11 20:04 ` [RFC 0/4] dynamically allocate arch specific system vectors H. Peter Anvin
2008-09-12 11:46 ` Dean Nelson [this message]
2008-09-14 15:35 ` Ingo Molnar
2008-09-14 15:48 ` Ingo Molnar
2008-09-15 21:50 ` Dean Nelson
2008-09-16 8:24 ` Ingo Molnar
2008-09-16 20:46 ` Dean Nelson
2008-09-17 17:30 ` Dimitri Sivanich
2008-09-17 18:59 ` Eric W. Biederman
2008-09-18 13:37 ` Dean Nelson
2008-09-18 19:18 ` H. Peter Anvin
2008-09-17 19:15 ` H. Peter Anvin
2008-09-17 20:21 ` Jack Steiner
2008-09-17 22:15 ` Eric W. Biederman
2008-09-18 1:09 ` H. Peter Anvin
2008-09-18 19:10 ` Jack Steiner
2008-09-19 0:28 ` Eric W. Biederman
2008-09-19 8:48 ` Ingo Molnar
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=20080912114638.GA2661@sgi.com \
--to=dcn@sgi.com \
--cc=Yinghai.lu@amd.com \
--cc=ajm@sgi.com \
--cc=ebiederm@xmission.com \
--cc=hpa@zytor.com \
--cc=jeremy@goop.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@elte.hu \
--cc=rusty@rustcorp.com.au \
--cc=suresh.b.siddha@intel.com \
--cc=tglx@linutronix.de \
--cc=torvalds@linux-foundation.org \
/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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.