Re: [Patch net v3 2/4] selftests/tc-testing: Add a test case for pfifo_head_drop qdisc when limit==0

[Simon Horman <horms@kernel.org>]

On Mon, Feb 03, 2025 at 04:58:39PM -0800, Cong Wang wrote:
> From: Quang Le <quanglex97@gmail.com>
> 
> When limit == 0, pfifo_tail_enqueue() must drop new packet and
> increase dropped packets count of the qdisc.
> 
> All test results:
> 
> 1..16
> ok 1 a519 - Add bfifo qdisc with system default parameters on egress
> ok 2 585c - Add pfifo qdisc with system default parameters on egress
> ok 3 a86e - Add bfifo qdisc with system default parameters on egress with handle of maximum value
> ok 4 9ac8 - Add bfifo qdisc on egress with queue size of 3000 bytes
> ok 5 f4e6 - Add pfifo qdisc on egress with queue size of 3000 packets
> ok 6 b1b1 - Add bfifo qdisc with system default parameters on egress with invalid handle exceeding maximum value
> ok 7 8d5e - Add bfifo qdisc on egress with unsupported argument
> ok 8 7787 - Add pfifo qdisc on egress with unsupported argument
> ok 9 c4b6 - Replace bfifo qdisc on egress with new queue size
> ok 10 3df6 - Replace pfifo qdisc on egress with new queue size
> ok 11 7a67 - Add bfifo qdisc on egress with queue size in invalid format
> ok 12 1298 - Add duplicate bfifo qdisc on egress
> ok 13 45a0 - Delete nonexistent bfifo qdisc
> ok 14 972b - Add prio qdisc on egress with invalid format for handles
> ok 15 4d39 - Delete bfifo qdisc twice
> ok 16 d774 - Check pfifo_head_drop qdisc enqueue behaviour when limit == 0
> 
> Signed-off-by: Quang Le <quanglex97@gmail.com>
> Signed-off-by: Cong Wang <cong.wang@bytedance.com>

Hi Cong,

Unfortunately this test still seems to be failing in the CI.

# not ok 577 d774 - Check pfifo_head_drop qdisc enqueue behaviour when limit == 0
# Could not match regex pattern. Verify command output:
# qdisc pfifo_head_drop 1: root refcnt 2 limit 0p
#  Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
#  backlog 0b 0p requeues 0

https://github.com/p4tc-dev/tc-executor/blob/storage/artifacts/977485/1-tdc-sh/stdout

-- 
pw-bot: cr