From: "Martin J. Bligh" <Martin.Bligh@us.ibm.com>
To: Rik van Riel <riel@conectiva.com.br>, Gerrit Huizenga <gh@us.ibm.com>
Cc: Clifford White <ctwhite@us.ibm.com>,
linux-kernel@vger.kernel.org, oliendm@us.ibm.com
Subject: Re: x86 question: Can a process have > 3GB memory?
Date: Wed, 08 May 2002 08:12:12 -0700 [thread overview]
Message-ID: <191939915.1020845530@[10.10.2.3]> (raw)
In-Reply-To: <Pine.LNX.4.44L.0205072155220.32261-100000@imladris.surriel.com>
>> Hey Cliff, we are planning to implement virtwin() if you remember that
>> from PTX. AWE on NT was derived from the same work. There should soon
>> be some discussion about it on lse-tech@lists.sourceforge.net or I can
>> give you some more data...
>
> Please implement it in userspace, using large POSIX shared memory
> segments and mmaping / munmapping them as needed.
>
> This seems like a special enough case to keep it out of the kernel
> entirely. If there's something not efficient enough we could work
> on optimising the whole mmap & munmap path...
How are you going to change the user page tables from userspace?
This mechanism would seem to need kernel support however you did it.
M.
next prev parent reply other threads:[~2002-05-08 15:13 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-05-07 23:03 Clifford White
2002-05-07 23:08 ` Robert Love
2002-05-08 5:33 ` Martin J. Bligh
2002-05-08 8:29 ` Andrea Arcangeli
2002-05-08 16:21 ` Robert Love
2002-05-07 23:33 ` Alan Cox
2002-05-08 16:54 ` Bill Davidsen
2002-05-08 0:16 ` Gerrit Huizenga
2002-05-08 0:56 ` Rik van Riel
2002-05-08 15:12 ` Martin J. Bligh [this message]
2002-05-08 15:17 ` Rik van Riel
2002-05-08 15:24 ` Andi Kleen
2002-05-09 21:24 ` tchiwam
2002-05-09 21:40 ` Robert Love
2002-05-09 23:56 ` Albert D. Cahalan
2002-05-10 6:58 ` Anton Blanchard
2002-05-10 19:07 ` Bill Davidsen
2002-05-10 19:42 ` Alan Cox
2002-05-10 19:41 ` Linus Torvalds
2002-05-08 8:22 ` Luigi Genoni
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