linux-kernel - Re: [PATCH] [2.6.32-longterm] ioat2: kill pending flag

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Message-ID: <20120531142801.GL5321@1wt.eu>
Date:	Thu, 31 May 2012 16:28:01 +0200
From:	Willy Tarreau <w@....eu>
To:	Mike Galbraith <efault@....de>
Cc:	stable <stable@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Dan Williams <dan.j.williams@...el.com>
Subject: Re: [PATCH] [2.6.32-longterm] ioat2: kill pending flag

Hi Mike,

On Thu, May 31, 2012 at 04:00:15PM +0200, Mike Galbraith wrote:
> Greetings,
> 
> While testing tbench 40 throughput on a 40 core (+SMT) Intel SDV S3E37,
> I found spin_lock_bh() consuming _90%_ of the box, driving throughput
> straight through the floor.  The commit below fixed it up.
> 
> This looks horrific enough to me to qualify for 2.6.32-longterm.

I've queued it up for next release. Thank you very much!

Willy

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