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
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