Konstantin Belousov 267ed8e2f7 When downgrading exclusively busied page to shared-busy state, wakeup
waiters.  Otherwise, owners of the shared-busy state are left blocked
and might get into a deadlock.

Note that the vm_page_busy_downgrade() function is not used in the
tree right now.

Reported and tested by:	pho (previous version)
Reviewed by:	alc, markj
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
Differential revision:	https://reviews.freebsd.org/D8195
2016-10-11 18:09:37 +00:00
..
2016-09-10 16:49:25 +00:00