From: "H. Peter Anvin" <hpa@zytor.com>
To: Dean Nelson <dcn@sgi.com>
Cc: Ingo Molnar <mingo@elte.hu>,
"Eric W. Biederman" <ebiederm@xmission.com>,
Alan Mayer <ajm@sgi.com>,
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: Wed, 17 Sep 2008 12:15:42 -0700 [thread overview]
Message-ID: <48D1575E.1050306@zytor.com> (raw)
In-Reply-To: <20080916204654.GA3532@sgi.com>
Dean Nelson wrote:
>
> sgi-gru driver
>
> The GRU is not an actual external device that is connected to an IOAPIC.
> The gru is a hardware mechanism that is embedded in the node controller
> (UV hub) that directly connects to the cpu socket. Any cpu (with permission)
> can do direct loads and stores to the gru. Some of these stores will result
> in an interrupt being sent back to the cpu that did the store.
>
> The interrupt vector used for this interrupt is not in an IOAPIC. Instead
> it must be loaded into the GRU at boot or driver initialization time.
>
Could you clarify there: is this one vector number per CPU, or are you
issuing a specific vector number and just varying the CPU number?
-hpa
next prev parent reply other threads:[~2008-09-17 19:20 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
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 [this message]
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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