linux-kernel - Re: [PATCH 10/17] netvm: Allow skb allocation to use PFMEMALLOC reserves

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Message-Id: <20120511.171738.549587472496189783.davem@davemloft.net>
Date:	Fri, 11 May 2012 17:17:38 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	mgorman@...e.de
Cc:	akpm@...ux-foundation.org, linux-mm@...ck.org,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	neilb@...e.de, a.p.zijlstra@...llo.nl, michaelc@...wisc.edu,
	emunson@...bm.net
Subject: Re: [PATCH 10/17] netvm: Allow skb allocation to use PFMEMALLOC
 reserves

From: Mel Gorman <mgorman@...e.de>
Date: Fri, 11 May 2012 15:32:18 +0100

> On Fri, May 11, 2012 at 12:57:40AM -0400, David Miller wrote:
>> Please change this to be a static branch.
> 
> Will do. I renamed memalloc_socks to sk_memalloc_socks, made it a int as
> atomics are unnecessary and I check it directly in a branch instead of a
> static inline. It should be relatively easy for the branch predictor.

No branch predictor can beat an unconditional branch :-)
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