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Date: Tue, 5 Jan 2010 15:00:42 +0900
Message-ID: <28c262361001042200k3e5a5ef9v42400120cbd33b61@mail.gmail.com>
Subject: Re: [RFC][PATCH 6/8] mm: handle_speculative_fault()
From: Minchan Kim <minchan.kim@gmail.com>
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Sender: owner-linux-mm@kvack.org
To: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>, "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>, Peter Zijlstra <peterz@infradead.org>, "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>, "linux-mm@kvack.org" <linux-mm@kvack.org>, cl@linux-foundation.org, "hugh.dickins" <hugh.dickins@tiscali.co.uk>, Nick Piggin <nickpiggin@yahoo.com.au>, Ingo Molnar <mingo@elte.hu>, Linus Torvalds <torvalds@linux-foundation.org>
List-ID: <linux-mm.kvack.org>

On Tue, Jan 5, 2010 at 1:43 PM, KAMEZAWA Hiroyuki
<kamezawa.hiroyu@jp.fujitsu.com> wrote:
> On Tue, 5 Jan 2010 13:29:40 +0900
> Minchan Kim <minchan.kim@gmail.com> wrote:
>
>> Hi, Kame.
>>
>> On Tue, Jan 5, 2010 at 9:25 AM, KAMEZAWA Hiroyuki
>> <kamezawa.hiroyu@jp.fujitsu.com> wrote:
>> > On Mon, 04 Jan 2010 19:24:35 +0100
>> > Peter Zijlstra <a.p.zijlstra@chello.nl> wrote:
>> >
>> >> Generic speculative fault handler, tries to service a pagefault
>> >> without holding mmap_sem.
>> >>
>> >> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
>> >
>> >
>> > I'm sorry if I miss something...how does this patch series avoid
>> > that vma is removed while __do_fault()->vma->vm_ops->fault() is called ?
>> > ("vma is removed" means all other things as freeing file struct etc..)
>>
>> Isn't it protected by get_file and iget?
>> Am I miss something?
>>
> Only kmem_cache_free() part of following code is modified by the patch.

That's it I missed. Thanks, Kame. ;-)
-- 
Kind regards,
Minchan Kim

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