linux-kernel - Re: [PATCH 3/3] net-dccp: Suppress warning about large allocations from DCCP

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Date:	Tue, 23 Jun 2009 13:03:54 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	David Miller <davem@...emloft.net>
CC:	acme@...hat.com, mel@....ul.ie, akpm@...ux-foundation.org,
	mingo@...e.hu, linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	htd@...cy-poultry.org
Subject: Re: [PATCH 3/3] net-dccp: Suppress warning about large allocations
 from DCCP

David Miller a écrit :
> From: Arnaldo Carvalho de Melo <acme@...hat.com>
> Date: Mon, 22 Jun 2009 23:39:36 -0300
> 
>> Em Mon, Jun 22, 2009 at 04:15:02PM -0700, David Miller escreveu:
>>> It's probably much more appropriate to make this stuff use
>>> alloc_large_system_hash(), like TCP does (see net/ipv4/tcp.c
>>> tcp_init()).
>>>
>>> All of this complicated DCCP hash table size computation code will
>>> simply disappear.  And it'll fix the warning too :-)
>> He mentioned that in the conversation that lead to this new patch
>> series, problem is that alloc_large_system_hash is __init, so when you
>> try to load dccp.ko it will not be available.
> 
> Fair enough.
> 
> It's such an unfortunate duplication of code, it's likely therefore
> better to remove the __init tag and export that symbol.

Agreed, I once considered using this function for futex hash table allocation
and just forgot about it...

But it has some bootmem references, it might need more work than just exporting it.
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