Re: [Patch net 2/4] Add test case to check for pfifo_tail_enqueue() behaviour when limit == 0

[Cong Wang <xiyou.wangcong@gmail.com>]

On Sat, Jan 25, 2025 at 07:20:42PM -0800, Cong Wang wrote:
> On Fri, Jan 24, 2025 at 11:37:43AM +0000, Simon Horman wrote:
> > On Thu, Jan 23, 2025 at 10:07:38PM -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 scheduler.
> > > 
> > > Signed-off-by: Quang Le <quanglex97@gmail.com>
> > > Signed-off-by: Cong Wang <cong.wang@bytedance.com>
> > 
> > Hi Cong, all,
> > 
> > This test is reporting "not ok" in the Netdev 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
> 
> Oops... It worked on my side, let me take a look.
> 

I ran it again for multiple times, it still worked for me:

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

Could you provide a link for me to check?

Just in case, please make sure patch 1/4 is applied before this test,
otherwise packets would not be dropped.

Meanwhile, I do need to update this patch anyway, because it hardcoded
dummy2...

Thanks.