[Bug 261603] sysctl kern.vnode disabled in 2003, can we re-enable now?

From: <bugzilla-noreply_at_freebsd.org>
Date: Mon, 31 Jan 2022 13:30:31 UTC

Konstantin Belousov <kib@FreeBSD.org> changed:

           What    |Removed                     |Added
                 CC|                            |kib@FreeBSD.org

--- Comment #1 from Konstantin Belousov <kib@FreeBSD.org> ---
In its current form this code does not compile.  After fixing all compilation
issues, the problem is still that it would try to allocate around hundred of
megabytes of kernel memory (contiguous KVA), on any relatively modern machine.

Can you explain the high-level interface needed by lsof there?  I do not see
raw xvnode as anything useful, even for the utility like lsof.  If somebody
can explain what lsof needs, we perhaps can design proper API that is both
useful and implementable.

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