api for sharing memory from kernel to userspace?
Pawel Jakub Dawidek
pjd at FreeBSD.org
Wed May 19 07:35:11 PDT 2004
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.
+> The memory can not be paged and should appear contig in the process's
+> address space. Any suggestions?
+> I need a way to either:
+> map user memory into the kernel's address space.
+> map kernel memory into the user's address space.
+> 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
In mapping kernel memory into user's address space I am interested as well
for GEOM Gate and other evil projects.
Pawel Jakub Dawidek http://www.FreeBSD.org
pjd at FreeBSD.org http://garage.freebsd.pl
FreeBSD committer Am I Evil? Yes, I Am!
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