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From: ebiederm@xmission.com (Eric W. Biederman)
To: "Lu, Yinghai" <yinghai.lu@amd.com>
Cc: "Andi Kleen" <ak@suse.de>, "Andrew Morton" <akpm@osdl.org>,
	linux-kernel@vger.kernel.org,
	"Luigi Genoni" <luigi.genoni@pirelli.com>,
	"Ingo Molnar" <mingo@elte.hu>,
	"Natalie Protasevich" <protasnb@gmail.com>
Subject: Re: [PATCH 2/2] x86_64 irq: Handle irqs pending in IRR during irq migration.
Date: Mon, 05 Feb 2007 12:59:18 -0700	[thread overview]
Message-ID: <m1r6t4wf3d.fsf@ebiederm.dsl.xmission.com> (raw)
In-Reply-To: <5986589C150B2F49A46483AC44C7BCA4907414@ssvlexmb2.amd.com> (Yinghai Lu's message of "Mon, 5 Feb 2007 11:29:35 -0800")

"Lu, Yinghai" <yinghai.lu@amd.com> writes:

> Eric,
>
> How about let apic_hangle_pending_vector take the irq too?

We can't compute the vector by reading the hardware registers after
we have acknowledged the irq.

I hope that was the answer you were looking for I'm not quite certain
what you mean by take.

> I wonder if there any chance that you have two IRQ_MOVE_PENDING?

I'm not quite certain what you are asking on the face of it there
is one bit per irq so it is impossible.

I don't think we can get into any trouble we don't let a vector be
reused on a cpu until we know it isn't in irr.  So even if things
come in highly out of order the should still function.

I also have seen irqs migrate on nearly every irq received.

Eric

  reply	other threads:[~2007-02-05 20:00 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-02-05 19:29 Lu, Yinghai
2007-02-05 19:59 ` Eric W. Biederman [this message]
  -- strict thread matches above, loose matches on Subject: below --
2007-02-05 23:33 Lu, Yinghai
2007-02-05 20:54 Lu, Yinghai
2007-02-05 23:03 ` Eric W. Biederman
2007-02-05 20:11 Lu, Yinghai
2007-02-05 20:37 ` Eric W. Biederman
     [not found] <200701221116.13154.luigi.genoni@pirelli.com>
     [not found] ` <200702021848.55921.luigi.genoni@pirelli.com>
2007-02-02 18:02   ` System crash after "No irq handler for vector" linux 2.6.19 Eric W. Biederman
     [not found]     ` <200702021905.39922.luigi.genoni@pirelli.com>
2007-02-03  0:31       ` [PATCH 1/2] x86_64 irq: Simplfy __assign_irq_vector Eric W. Biederman
2007-02-03  0:35         ` [PATCH 2/2] x86_64 irq: Handle irqs pending in IRR during irq migration Eric W. Biederman
2007-02-03  1:05           ` Andrew Morton
2007-02-03  1:39             ` Eric W. Biederman
2007-02-03  2:01               ` Andrew Morton
2007-02-03  7:32             ` Arjan van de Ven
2007-02-03  7:55               ` Eric W. Biederman
2007-02-03 14:31                 ` l.genoni
2007-02-03 10:01           ` Andi Kleen
2007-02-03 10:22             ` Eric W. Biederman
2007-02-03 10:26               ` Andi Kleen
2007-02-06  7:36           ` Ingo Molnar
2007-02-06  8:57             ` Eric W. Biederman
     [not found]             ` <200702061012.25910.luigi.genoni@pirelli.com>
2007-02-06 22:05               ` Eric W. Biederman
2007-02-06 22:16             ` Eric W. Biederman
2007-02-06 22:25               ` Ingo Molnar
2007-02-07  2:33                 ` Eric W. Biederman
2007-02-08 11:48                 ` Eric W. Biederman
2007-02-08 20:19                   ` Eric W. Biederman
2007-02-09  6:40                     ` Eric W. Biederman

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