K 10
svn:author
V 3
alc
K 8
svn:date
V 27
2017-10-01T17:04:26.542213Z
K 7
svn:log
V 187
When an I/O error occurs on page out, there is no need to dirty the page,
because it is already dirty.  Instead, assert that the page is dirty.

Reviewed by:	kib, markj
MFC after:	1 week

END