netdev - Re: [PATCH 08/12] netvm: Allow skb allocation to use PFMEMALLOC reserves

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Message-ID: <20110415104401.GC22688@suse.de>
Date:	Fri, 15 Apr 2011 11:44:01 +0100
From:	Mel Gorman <mgorman@...e.de>
To:	David Miller <davem@...emloft.net>
Cc:	linux-mm@...ck.org, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, a.p.zijlstra@...llo.nl
Subject: Re: [PATCH 08/12] netvm: Allow skb allocation to use PFMEMALLOC
 reserves

On Thu, Apr 14, 2011 at 02:33:35PM -0700, David Miller wrote:
> From: Mel Gorman <mgorman@...e.de>
> Date: Thu, 14 Apr 2011 11:41:34 +0100
> 
> > +extern int memalloc_socks;
> > +static inline int sk_memalloc_socks(void)
> > +{
> > +	return memalloc_socks;
> > +}
> > +
>  ...
> > +static DEFINE_MUTEX(memalloc_socks_lock);
> > +int memalloc_socks __read_mostly;
> 
> Please use an atomic_t, it has to be more efficient than this mutex
> business.

Will fix.

Thanks.

-- 
Mel Gorman
SUSE Labs
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