K 10
svn:author
V 3
kib
K 8
svn:date
V 27
2020-11-26T18:16:32.338298Z
K 7
svn:log
V 421
nullfs: provide custom bypass for VOP_READ_PGCACHE().

Normal bypass expects locked vnode, which is not true for
VOP_READ_PGCACHE().  Ensure liveness of the lower vnode by taking the
upper vnode interlock, which is also taked by null_reclaim() when
setting v_data to NULL.

Reported and tested by:	pho
Reviewed by:	markj, mjg
Sponsored by:	The FreeBSD Foundation
Differential revision:	https://reviews.freebsd.org/D27327

END