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Subject: [Bug 224479] kernel panic in reboot+swapoff sys call
Date: Thu, 28 Dec 2017 23:09:46 +0000
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D224479

--- Comment #22 from Konstantin Belousov <kib@FreeBSD.org> ---
(In reply to Conrad Meyer from comment #20)
Because we do not enforce a policy in the kernel on the possible md(4) usag=
e.

Even assuming that we do, we would need
(a) teach VFS to see through md(4) to understand the usages for the files
(b) call swap_pager_swapoff() while VFS flushes vnodes.
Both are intolerable layering violations, see the reference to 'policy' abo=
ve.

--=20
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