Re: [PATCH net-next] selftests: drv-net: test drivers sleeping in ndo_get_stats64

Jakub Kicinski kuba@kernel.org writes:

Most of our tests use rtnetlink to read device stats, so they don't expose the drivers much to paths in which device stats are read under RCU. Add tests which hammer profcs reads to make sure drivers:

• don't sleep while reporting stats,
• can handle parallel reads,
• can handle device going down while reading.

Set ifname on the env class in NetDrvEnv, we already do that in NetDrvEpEnv.

KTAP version 1 1..7 ok 1 stats.check_pause ok 2 stats.check_fec ok 3 stats.pkt_byte_sum ok 4 stats.qstat_by_ifindex ok 5 stats.check_down ok 6 stats.procfs_hammer # completed up/down cycles: 6 ok 7 stats.procfs_downup_hammer # Totals: pass:7 fail:0 xfail:0 xpass:0 skip:0 error:0

Signed-off-by: Jakub Kicinski kuba@kernel.org

Reviewed-by: Petr Machata petrm@nvidia.com