K 10
svn:author
V 3
cem
K 8
svn:date
V 27
2020-08-02T16:34:27.351206Z
K 7
svn:log
V 462
Unlocked getblk: Fix new false-positive assertion

A free buf's lock may be held (temporarily) due to unlocked lookup, so
buf_alloc() must acquire it without LK_NOWAIT.  The unlocked getblk path
should unlock it promptly once it realizes the identity does not match
the buffer it was searching for.

Reported by:	gallatin
Reviewed by:	kib
Tested by:	pho
X-MFC-With:	r363482
Sponsored by:	Dell EMC Isilon
Differential Revision:	https://reviews.freebsd.org/D25914

END