linux-kernel - Re: [patch 1/2] mm: speculative get

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Message-ID: <44CFE98D.2060901@yahoo.com.au>
Date:	Wed, 02 Aug 2006 09:53:49 +1000
From:	Nick Piggin <nickpiggin@...oo.com.au>
To:	Oleg Nesterov <oleg@...sign.ru>
CC:	Dave Kleikamp <shaggy@...tin.ibm.com>,
	Nick Piggin <npiggin@...e.de>, Hugh Dickins <hugh@...itas.com>,
	Andrew Morton <akpm@...l.org>,
	Andy Whitcroft <apw@...dowen.org>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: Re: [patch 1/2] mm: speculative get_page

Oleg Nesterov wrote:
> On 08/01, Dave Kleikamp wrote:

>>Isn't the page locked when calling remove_mapping()?  It looks like
>>SetPageNoNewRefs & ClearPageNoNewRefs are called in safe places.  Either
>>the page is locked, or it's newly allocated.  I could have missed
>>something, though.
> 
> 
> No, I think it is I who missed something, thanks.

Yeah, SetPageNoNewRefs is indeed called only under PageLocked or for
newly allocated pages. I should make a note about that, as it isn't
immediately clear.

Thanks

-- 
SUSE Labs, Novell Inc.
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