MFV r316901:
7730 libzfs`add_config() leaks config nvl when reading spare/l2cache devices
illumos/illumos-gate@105686550ee9cbf5d033166a8a2a5a763667d436
https://github.com/illumos/illumos-gate/commit/105686550ee9cbf5d033166a8a2a5a763667d436
https://www.illumos.org/issues/7730
antares:root:~# mdb /usr/sbin/zpool
> ::sysbp _exit
> ::run import
pool: data
id: 2093977168778024605
state: ONLINE
action: The pool can be imported using its name or numeric identifier.
config:
data ONLINE
c6t0d0 ONLINE
c6t1d0 ONLINE
cache
c6t2d0
mdb: stop on entry to _exit
mdb: target stopped at:
0xfee556ba: nop
mdb: You've got symbols!
Loading modules: [ ld.so.1 libumem.so.1 libc.so.1 libtopo.so.1 libavl.so.1
libnvpair.so.1 ]
> ::findleaks -d
BYTES LEAKED VMEM_SEG CALLER
4096 10 fda7b000 MMAP
8192 1 fea8d000 MMAP
8192 1 fe76d000 MMAP
8192 1 fe66e000 MMAP
4096 1 fe570000 MMAP
8192 1 fe470000 MMAP
4096 1 fe372000 MMAP
4096 1 fe273000 MMAPReviewed by: Matthew Ahrens <mahrens@delphix.com>
Reviewed by: Serapheim Dimitropoulos <serapheim@delphix.com>
Approved by: Robert Mustacchi <rm@joyent.com>
Author: Yuri Pankov <yuri.pankov@nexenta.com>