K 10
svn:author
V 2
kp
K 8
svn:date
V 27
2019-10-11T17:04:38.489357Z
K 7
svn:log
V 534
mountroot: run statfs after mounting devfs

The usual flow for mounting a file system is to VFS_MOUNT() and then
immediately VFS_STATFS().

That's not done in vfs_mountroot_devfs(), which means the
mp->mnt_stat.f_iosize field is not correctly populated, which in turn
causes us to mark valid aio operations as unsafe (because the io size is
set to 0), ultimately causing the aio_test:md_waitcomplete test to fail.

Reviewed by:	mckusick
MFC after:	1 week
Sponsored by:	Axiado
Differential Revision:	https://reviews.freebsd.org/D21897

END