linux-kernel - Re: [PATCH 3/3] x86_64 irq: Allocate a vector across all cpus for genapic

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Message-ID: <20061008190144.GQ14186@rhun.haifa.ibm.com>
Date:	Sun, 8 Oct 2006 21:01:44 +0200
From:	Muli Ben-Yehuda <muli@...ibm.com>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>
Cc:	Linus Torvalds <torvalds@...l.org>, Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>, Andi Kleen <ak@....de>,
	"Protasevich, Natalie" <Natalie.Protasevich@...SYS.com>,
	Andrew Morton <akpm@...l.org>,
	Linux-Kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 3/3] x86_64 irq: Allocate a vector across all cpus for genapic_flat.

On Sun, Oct 08, 2006 at 07:47:55AM -0600, Eric W. Biederman wrote:

> This should also fix the problem report where a hyperthreaded
> cpu was receving the irq on the wrong hyperthread when in
> logical delivery mode because the previous behaviour is restored.
> 
> This patch properly records our allocation of the first 16 irqs
> to the first 16 available vectors on all cpus.  This should be
> fine but it may run into problems with multiple interrupts at
> the same interrupt level.  Except for some badly maintained comments
> in the code and the behaviour of the interrupt allocator I have
> no real understanding of that problem.
> 
> Signed-off-by: Eric W. Biederman <ebiederm@...ssion.com>

Acked-by: Muli Ben-Yehuda <muli@...ibm.com>

Cheers,
Muli
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