K 10
svn:author
V 3
mjg
K 8
svn:date
V 27
2016-09-30T17:27:17.910929Z
K 7
svn:log
V 391
vfs: batch free vnodes in per-mnt lists

Previously free vnodes would always by directly returned to the global
LRU list. With this change up to mnt_free_list_batch vnodes are collected
first.

syncer runs always return the batch regardless of its size.

While vnodes on per-mnt lists are not counted as free, they can be
returned in case of vnode shortage.

Reviewed by:	kib
Tested by:	pho

END