linux-kernel - Re: [patch 3/4 -mm] flex_array: poison free elements

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Date:	Wed, 09 Sep 2009 11:45:15 +0800
From:	Li Zefan <lizf@...fujitsu.com>
To:	David Rientjes <rientjes@...gle.com>
CC:	Dave Hansen <dave@...ux.vnet.ibm.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [patch 3/4 -mm] flex_array: poison free elements

11:41, David Rientjes wrote:
> On Wed, 9 Sep 2009, Li Zefan wrote:
> 
>> I was not talking about ftrace_ret_stack, I was talking about
>> struct ftrace_page and struct ftrace_profile_page. ;)
>>
> 
> Gack, ftrace_page would probably be better off simply using the flex list 
> implementation I suggested which constructs a list from page->lru since it 
> doesn't appear to require indexing into the array, it simply requires an 
> iteration in all cases (or am I wrong?).  Flex lists could easily be made 
> to support seqfiles.
> 

Right, iteration is needed but indexing is not. I thought
about flex list too, flex array has some limitations which
make it hard to find a real user.

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