zfs & waiting on zio->io_cv

[Danny Braniss]

there is a big delay (probably more than 1 sec.) when doing simple tasks
on this zfs, like ls(1), or 'zfs list', long enough to hit ^T
and get the same [zio->io_cv)], any hints?

store-01# zfs list
(hitting ^T)load: 0.00  cmd: zfs 88376 [zio->io_cv)] 0.00u 0.00s 0% 1672k
(hitting ^T)load: 0.00  cmd: zfs 88376 [zio->io_cv)] 0.00u 0.00s 0% 1684k
NAME              USED  AVAIL  REFER  MOUNTPOINT
h                 472G  11.2T    23K  /h
h/home            466G  11.2T   466G  /h/home
h/home at 23-10-08    54K      -   466G  -
h/root             18K  11.2T    18K  /h/root
h/src              18K  11.2T    18K  /h/src
h/system         5.64G  11.2T  5.64G  /h/system

cheers,
	danny