From: Dave McCracken <dmccr@us.ibm.com>
To: Andrew Morton <akpm@digeo.com>
Cc: linux-mm@kvack.org
Subject: Re: handling pte_chain_alloc() failures
Date: Sat, 28 Dec 2002 17:59:30 -0600 [thread overview]
Message-ID: <23300000.1041119970@[10.1.1.5]> (raw)
In-Reply-To: <3E0CEA3F.35B3044@digeo.com>
--On Friday, December 27, 2002 16:03:11 -0800 Andrew Morton
<akpm@digeo.com> wrote:
> Dave, could I ask you to check the locking changes carefully? Some
> of them are fairly nasty. Thanks.
The only thing I specifically see is related to the pte_page_lock. In
places where ptepage is derived from *pmd, the contents of *pmd can change
if another thread unshares that pte page on a fault. There should be a
line like:
ptepage = pmd_page(*pmd);
in the places where it reacquires the pte_page_lock.
I'll study it some more, but that stands out.
Dave McCracken
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next prev parent reply other threads:[~2002-12-28 23:59 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-12-28 0:03 Andrew Morton
2002-12-28 23:59 ` Dave McCracken [this message]
2002-12-29 0:53 ` Andrew Morton
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