K 10
svn:author
V 5
markj
K 8
svn:date
V 27
2020-09-07T23:28:33.089725Z
K 7
svn:log
V 629
vm_object_split(): Handle orig_object type changes.

orig_object->type can change from OBJT_DEFAULT to OBJT_SWAP while
vm_object_split() is sleeping.  In this case some pages in new_object
may be left unbusied, but vm_object_split() attempts to unbusy all of
them.

Track the beginning of the busied range.  Add an assertion to verify
that pages are not re-added to the source object while sleeping.

Reported by:	Olympios Petrakis <olympios.petrakis@netapp.com>
Reviewed by:	alc, kib
Tested by:	pho
MFC after:	1 week
Sponsored by:	NetApp, Inc.
Sponsored by:	Klara, Inc.
Differential Revision:	https://reviews.freebsd.org/D26223

END