K 10
svn:author
V 5
trasz
K 8
svn:date
V 27
2017-04-14T20:15:34.434562Z
K 7
svn:log
V 301
Don't try to write out bufs that have already failed with ENXIO.
This fixes some panics after disconnecting mounted disks.

Submitted by:	imp (slightly different version, which I've then lost)
Reviewed by:	kib, imp, mckusick
MFC after:	2 weeks
Differential Revision:	https://reviews.freebsd.org/D9674

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