linux-kernel - Re: [PATCH] x86: Add check for number of available vectors before CPU down [v3]

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Message-ID: <20131220225624.GD22695@tassilo.jf.intel.com>
Date:	Fri, 20 Dec 2013 14:56:24 -0800
From:	Andi Kleen <ak@...ux.intel.com>
To:	Prarit Bhargava <prarit@...hat.com>
Cc:	linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
	Michel Lespinasse <walken@...gle.com>,
	Seiji Aguchi <seiji.aguchi@....com>,
	Yang Zhang <yang.z.zhang@...el.com>,
	Paul Gortmaker <paul.gortmaker@...driver.com>,
	janet.morgan@...el.com, tony.luck@...el.com, ruiv.wang@...il.com,
	gong.chen@...ux.intel.com
Subject: Re: [PATCH] x86: Add check for number of available vectors before
 CPU down [v3]

On Fri, Dec 20, 2013 at 10:50:09AM -0500, Prarit Bhargava wrote:
> I tested across various systems with both the linux.git and linux-next.git
> trees and do not see any false positives.  The patch behaves as expected on
> a system with 590 IRQs allocated at boot time; the system refuses to down cpu
> 62.

I read the patch and it looks good to me

I haven't double checked, but I'm assuming the hot plug locks are held
while you are doing this.

Reviewed-by: Andi Kleen <ak@...ux.intel.com>

-Andi
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