K 10
svn:author
V 3
mjg
K 8
svn:date
V 27
2017-09-30T18:23:45.058872Z
K 7
svn:log
V 294
tmpfs: skip zero-sized page count updates

Such updates consisted of vast majority of modificiations, especially
in tmpfs_reg_resize.

For the case where page count did no change and the size grew we only
need to update tn_size. Use this fact to avoid vm object lock/relock.

MFC after:	1 week

END