linux-kernel - Re: [14/14] vcompound: Avoid vmalloc for ehash

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Message-Id: <20080321.003100.155729406.davem@davemloft.net>
Date:	Fri, 21 Mar 2008 00:31:00 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	dada1@...mosbay.com
Cc:	clameter@....com, linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org
Subject: Re: [14/14] vcompound: Avoid vmalloc for ehash_locks

From: Eric Dumazet <dada1@...mosbay.com>
Date: Fri, 21 Mar 2008 08:02:11 +0100

> But, isnt it defeating the purpose of this *particular* vmalloc() use ?
> 
> CONFIG_NUMA and vmalloc() at boot time means :
> 
> Try to distribute the pages on several nodes.
> 
> Memory pressure on ehash_locks[] is so high we definitly want to spread it.
> 
> (for similar uses of vmalloc(), see also hashdist=1 )
> 
> Also, please CC netdev for network patches :)

I agree with Eric, converting any of the networking hash
allocations to this new facility is not the right thing
to do.
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