From: "Stephen C. Tweedie" <sct@redhat.com>
To: Mark_H_Johnson@Raytheon.com
Cc: linux-mm@kvack.org, James_P_Cassidy@Raytheon.com
Subject: Re: Physical address of a user virtual address
Date: Thu, 1 Nov 2001 14:08:07 +0000 [thread overview]
Message-ID: <20011101140807.B2321@redhat.com> (raw)
In-Reply-To: <OF59D35C34.54785967-ON86256AF5.0002C7E7@hou.us.ray.com>; from Mark_H_Johnson@Raytheon.com on Mon, Oct 29, 2001 at 06:42:51PM -0600
Hi,
On Mon, Oct 29, 2001 at 06:42:51PM -0600, Mark_H_Johnson@Raytheon.com wrote:
> We can't seem to find any "easy" way (e.g., call a function) that converts
> an address in the virtual address space of an application to the physical
> address. The book "Linux Device Drivers" basically tells us to walk the
> page tables. From that, we think we must create a driver or kernel module
> to get access to the proper variables and functions. That looks like a lot
> of work for something that sounds simple.
>
> Has someone already solved this done this and can point us to some code
> that implements this?
map_user_kiobuf() is designed to walk the page tables, find the
appropriate physical pages and pin them in memory.
--Stephen
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prev parent reply other threads:[~2001-11-01 14:08 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-10-30 0:42 Physical address of a user virtual address Mark_H_Johnson
2001-10-30 18:17 ` Timur Tabi
2001-11-01 14:08 ` Stephen C. Tweedie [this message]
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