From: Manfred Spraul <manfred@colorfullife.com>
To: Arjan van de Ven <arjanv@redhat.com>
Cc: Eli Cohen <mlxk@mellanox.co.il>, linux-kernel@vger.kernel.org
Subject: Re: locking user space memory in kernel
Date: Sun, 21 Mar 2004 15:12:25 +0100 [thread overview]
Message-ID: <405DA2C9.9090707@colorfullife.com> (raw)
In-Reply-To: <405D7D2F.9050507@colorfullife.com>
Arjan wrote:
>On Sun, 2004-03-21 at 12:18, Eli Cohen wrote:
>> Hi,
>> I need to be able to lock memory allocated in user space and passed to
>> my driver, in order to pass it to a dma controller that can maintain a
>> translation table for each process. The obvious thing is to use
>
>the linux way is to do it the other way around, provide a device that
>userspace then can mmap......
>
That's definitively the preferred method, but unfortunately there are
existing apis that are the other way around. I think the main MPI
transfer functions must read/write to arbitrary addresses, I'm sure
there are other examples.
--
Manfred
next prev parent reply other threads:[~2004-03-21 14:12 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-03-21 11:31 locking user space memory in kernel Manfred Spraul
2004-03-21 14:12 ` Manfred Spraul [this message]
2004-03-21 16:40 ` Roland Dreier
2004-03-21 17:15 ` Manfred Spraul
2004-03-21 18:18 ` Roland Dreier
2004-03-22 13:15 ` Eli Cohen
2004-03-22 15:22 ` Eli Cohen
2004-03-22 19:34 ` Manfred Spraul
-- strict thread matches above, loose matches on Subject: below --
2004-04-08 6:20 Ross Dickson
2004-04-08 0:45 Libor Michalek
2004-04-08 5:22 ` Manfred Spraul
2004-03-21 11:18 Eli Cohen
2004-03-21 11:35 ` Arjan van de Ven
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