From: "David S. Miller" <davem@redhat.com>
To: Andrew Morton <akpm@osdl.org>
Cc: joe.korty@ccur.com, linux-kernel@vger.kernel.org,
riel@redhat.com, andrea@suse.de
Subject: Re: mlockall and mmap of IO devices don't mix
Date: Fri, 3 Oct 2003 22:47:27 -0700 [thread overview]
Message-ID: <20031003224727.2f6956b5.davem@redhat.com> (raw)
In-Reply-To: <20031003172727.3d2b6cb2.akpm@osdl.org>
On Fri, 3 Oct 2003 17:27:27 -0700
Andrew Morton <akpm@osdl.org> wrote:
> Maybe it's best to not overload VM_RESERVED in this manner, but to always
> mark /dev/mem as VM_IO.
Just in cast is isn't clear, it should be defined that anything
that sets VM_IO on an mmap() area should prefill the page tables
as a side effect of such a mmap() request.
Then things like mlockall() have simple semantics on VM_IO area, they
end up being a nop.
next prev parent reply other threads:[~2003-10-04 5:47 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-10-03 21:44 mlockall and mmap of IO devices don't mix Joe Korty
2003-10-03 22:23 ` Andrew Morton
2003-10-03 22:55 ` Joe Korty
2003-10-03 23:06 ` Andrew Morton
2003-10-03 23:28 ` Joe Korty
2003-10-03 23:15 ` Andrew Morton
2003-10-03 23:54 ` Joe Korty
2003-10-04 0:27 ` Andrew Morton
2003-10-04 5:47 ` David S. Miller [this message]
2003-10-04 9:29 ` Ingo Oeser
2004-05-21 11:34 ` Mark Hounschell
2004-05-22 2:13 ` Andrew Morton
2004-05-22 10:47 ` Mark Hounschell
2004-05-23 12:58 ` Mark Hounschell
2004-05-25 14:27 ` Joe Korty
2004-05-25 19:47 ` Andrew Morton
2004-05-25 21:31 ` Joe Korty
2004-07-16 21:01 ` Mark Hounschell
[not found] <CFYv.787.23@gated-at.bofh.it>
2003-10-04 7:02 ` Andi Kleen
2003-10-04 7:42 ` Andrew Morton
2003-10-04 8:29 ` Andi Kleen
2003-10-04 8:47 ` Ingo Oeser
2003-10-04 9:17 ` Andi Kleen
2003-10-04 9:22 ` Russell King
2003-10-04 10:02 ` Ingo Oeser
2003-10-04 10:13 ` Russell King
2003-10-04 14:19 ` Ingo Oeser
2003-10-04 14:19 ` Ingo Oeser
2003-10-04 14:32 ` Martin J. Bligh
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