From: Linus Torvalds <torvalds@osdl.org>
To: Keith Mannthey <kmannth@us.ibm.com>
Cc: Andrew Morton <akpm@osdl.org>,
"Martin J. Bligh" <mbligh@aracnet.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
linux-mm@kvack.org
Subject: Re: [Bugme-new] [Bug 2019] New: Bug from the mm subsystem involving X (fwd)
Date: Wed, 4 Feb 2004 18:47:42 -0800 (PST) [thread overview]
Message-ID: <Pine.LNX.4.58.0402041844100.2086@home.osdl.org> (raw)
In-Reply-To: <1075948401.13163.19077.camel@dyn318004bld.beaverton.ibm.com>
On Wed, 4 Feb 2004, Keith Mannthey wrote:
>
> I tried Andrews VM_IO patch earlier today but it didn't fix the
> problem.
Yeah, that patch is not actually converting the pfn_valid() users to only
trust VM_IO, it only does a few special cases (notably the follow_pages()
thing, which wasn't the issue here).
So the patch would have to be expanded to cover _all_ of the page table
following functions. It probably isn't that much, just looking for code
that checks for PageReserved() will pinpoint the needed users pretty well.
So I think the VM_IO approach could fix this, but it would need to be
fleshed out more. In the meantime, fixing pfn_valid() is definitely the
right thing to do.
Linus
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next prev parent reply other threads:[~2004-02-05 2:47 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-02-04 23:17 Martin J. Bligh
2004-02-04 23:58 ` Linus Torvalds
2004-02-05 0:12 ` Martin J. Bligh
2004-02-05 0:36 ` Martin J. Bligh
2004-02-05 0:43 ` Linus Torvalds
2004-02-05 0:56 ` Andrew Morton
2004-02-05 1:29 ` Linus Torvalds
2004-02-05 1:56 ` Keith Mannthey
2004-02-05 2:04 ` Linus Torvalds
2004-02-05 2:33 ` Keith Mannthey
2004-02-05 2:47 ` Linus Torvalds [this message]
2004-02-06 7:17 ` Martin J. Bligh
2004-02-06 7:19 ` Martin J. Bligh
2004-02-06 9:57 ` Dave Hansen
2004-02-06 15:49 ` Martin J. Bligh
2004-02-06 17:22 ` Dave Hansen
2004-02-06 19:59 ` Martin J. Bligh
2004-02-06 20:16 ` Linus Torvalds
2004-02-06 21:18 ` Martin J. Bligh
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