From owner-freebsd-hackers@FreeBSD.ORG  Wed May 19 07:35:11 2004
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Date: Wed, 19 May 2004 16:34:53 +0200
From: Pawel Jakub Dawidek <pjd@FreeBSD.org>
To: Alfred Perlstein <alfred@freebsd.org>
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Subject: Re: api for sharing memory from kernel to userspace?
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On Wed, May 19, 2004 at 05:29:07AM -0700, Alfred Perlstein wrote:
+> I need to share about 100megs of memory between kernel and userspace.
+>=20
+> The memory can not be paged and should appear contig in the process's
+> address space.  Any suggestions?
+>=20
+> I need a way to either:
+> map user memory into the kernel's address space.
+> map kernel memory into the user's address space.
+>=20
+> I was looking at pmap_qenter() but it didn't see attractive because
+> it's for "short term mappings", this mapping will exist for quite a
+> while.

In mapping kernel memory into user's address space I am interested as well
for GEOM Gate and other evil projects.

--=20
Pawel Jakub Dawidek                       http://www.FreeBSD.org
pjd@FreeBSD.org                           http://garage.freebsd.pl
FreeBSD committer                         Am I Evil? Yes, I Am!

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