From: Ingo Molnar <mingo@elte.hu>
To: Manfred Spraul <manfred@colorfullife.com>
Cc: linux-kernel@vger.kernel.org, Andrew Morton <akpm@osdl.org>,
Alexander Viro <viro@math.psu.edu>
Subject: Re: 4GB+DEBUG_PAGEALLOC oopses with 2.6.0-test3-mm1
Date: Mon, 11 Aug 2003 19:19:43 +0200 (CEST) [thread overview]
Message-ID: <Pine.LNX.4.56.0308111917170.17605@localhost.localdomain> (raw)
In-Reply-To: <3F37BED1.405@colorfullife.com>
On Mon, 11 Aug 2003, Manfred Spraul wrote:
> > this is not a bug technically, unless the mount options are in the
> > last linearly mapped page. It is a bug to copy those unallocated
> > bytes, but they do not get to relied upon. Note that the non-4G code
> > copies them just as much.
>
> Or unless there are holes in the memory map, or unless pages were
> unmapped from the kernel linear mapping for GART.
> IMHO the currect code is unacceptable.
IMHO the mount-options API is quite unclean - since when do we guarantee
-EFAULT semantics?
> It is possible to use direct_copy_ instead of memcpy for fs==KERNEL_DS
> in mm/usercopy.c?
yes. But i still think we should fix the API too.
Ingo
next prev parent reply other threads:[~2003-08-11 17:30 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-08-10 10:33 Manfred Spraul
2003-08-11 8:56 ` Ingo Molnar
2003-08-11 15:22 ` Manfred Spraul
2003-08-11 15:24 ` Ingo Molnar
2003-08-11 16:05 ` Manfred Spraul
2003-08-11 17:19 ` Ingo Molnar [this message]
2003-08-11 18:01 ` Manfred Spraul
2003-08-11 9:00 ` Ingo Molnar
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