linux-kernel - Re: [PATCH 1/2] x86_64 irq: Simplify the vector allocator.

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Date:	Sun, 22 Oct 2006 23:15:15 -0700
From:	yhlu <yhlu.kernel@...il.com>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>
Cc:	"Andi Kleen" <ak@...e.de>, "Muli Ben-Yehuda" <muli@...ibm.com>,
	"Linux Kernel Mailing List" <linux-kernel@...r.kernel.org>,
	"Andrew Morton" <akpm@...l.org>
Subject: Re: [PATCH 1/2] x86_64 irq: Simplify the vector allocator.

On 10/22/06, Eric W. Biederman <ebiederm@...ssion.com> wrote:
>
> There is no reason to remember a per cpu position of which vector
> to try.  Keeping a global position is simpler and more likely to
> result in a global vector allocation even if I don't need or require
> it.  For level triggered interrupts this means we are less likely to
> acknowledge another cpus irq, and cause the level triggered irq to
> harmlessly refire.
>
> This simplification makes it easier to only access data structures
> of  online cpus, by having fewer special cases to deal with.
>
>
> Signed-off-by: Eric W. Biederman <ebiederm@...ssion.com>

Good, It will keep increase vector, and only try to use same vector for
different cpu when vector is used up.

Acked-by: Yinghai Lu <yinghai.lu@....com>
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