From: Lorenzo Bianconi <lorenzo@kernel.org>
To: Jakub Sitnicki <jakub@cloudflare.com>
Cc: netdev@vger.kernel.org, davem@davemloft.net, ast@kernel.org,
brouer@redhat.com, daniel@iogearbox.net, toke@redhat.com,
lorenzo.bianconi@redhat.com, dsahern@kernel.org,
andrii.nakryiko@gmail.com, bpf@vger.kernel.org
Subject: Re: [PATCH v7 bpf-next 0/9] introduce support for XDP programs in CPUMAP
Date: Fri, 17 Jul 2020 18:31:11 +0200 [thread overview]
Message-ID: <20200717163111.GA633625@localhost.localdomain> (raw)
In-Reply-To: <20200717171333.3fe979e6@toad>
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> On Fri, 17 Jul 2020 13:01:36 +0200
> Lorenzo Bianconi <lorenzo@kernel.org> wrote:
>
> > [...]
> >
[...]
> Was able to trigger it running the newly added selftest:
>
> virtme-init: console is ttyS0
> bash-5.0# ./test_progs -n 100
> #100/1 cpumap_with_progs:OK
> #100 xdp_cpumap_attach:OK
> Summary: 1/1 PASSED, 0 SKIPPED, 0 FAILED
> bash-5.0# [ 247.177168] INFO: task cpumap/0/map:3:198 blocked for more than 122 seconds.
> [ 247.181306] Not tainted 5.8.0-rc4-01456-gbfdfa51702de #815
> [ 247.184487] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
> [ 247.188876] cpumap/0/map:3 D 0 198 2 0x00004000
> [ 247.192624] Call Trace:
> [ 247.194327] __schedule+0x5ad/0xf10
> [ 247.196860] ? pci_mmcfg_check_reserved+0xd0/0xd0
> [ 247.199853] ? static_obj+0x31/0x80
> [ 247.201917] ? mark_held_locks+0x24/0x90
> [ 247.204398] ? cpu_map_update_elem+0x6d0/0x6d0
> [ 247.207098] schedule+0x6f/0x160
> [ 247.209079] schedule_preempt_disabled+0x14/0x20
> [ 247.211863] kthread+0x175/0x240
> [ 247.213698] ? kthread_create_on_node+0xd0/0xd0
> [ 247.216054] ret_from_fork+0x1f/0x30
> [ 247.218363]
> [ 247.218363] Showing all locks held in the system:
> [ 247.222150] 1 lock held by khungtaskd/33:
> [ 247.224894] #0: ffffffff82d246a0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x28/0x1c3
> [ 247.231113]
> [ 247.232335] =============================================
> [ 247.232335]
>
> qemu running with 4 vCPUs, 4 GB of memory. .config uploaded at
> https://paste.centos.org/view/0c14663d
ack, thx Jakub. I will look at it.
Regards,
Lorenzo
>
> HTH,
> -jkbs
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next prev parent reply other threads:[~2020-07-17 16:31 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-14 13:56 [PATCH v7 bpf-next 0/9] introduce support for XDP programs in CPUMAP Lorenzo Bianconi
2020-07-14 13:56 ` [PATCH v7 bpf-next 1/9] cpumap: use non-locked version __ptr_ring_consume_batched Lorenzo Bianconi
2020-07-14 13:56 ` [PATCH v7 bpf-next 2/9] net: refactor xdp_convert_buff_to_frame Lorenzo Bianconi
2020-07-14 13:56 ` [PATCH v7 bpf-next 3/9] samples/bpf: xdp_redirect_cpu_user: do not update bpf maps in option loop Lorenzo Bianconi
2020-07-14 13:56 ` [PATCH v7 bpf-next 4/9] cpumap: formalize map value as a named struct Lorenzo Bianconi
2020-07-14 13:56 ` [PATCH v7 bpf-next 5/9] bpf: cpumap: add the possibility to attach an eBPF program to cpumap Lorenzo Bianconi
2020-07-14 13:56 ` [PATCH v7 bpf-next 6/9] bpf: cpumap: implement XDP_REDIRECT for eBPF programs attached to map entries Lorenzo Bianconi
2020-07-14 13:56 ` [PATCH v7 bpf-next 7/9] libbpf: add SEC name for xdp programs attached to CPUMAP Lorenzo Bianconi
2020-07-14 13:56 ` [PATCH v7 bpf-next 8/9] samples/bpf: xdp_redirect_cpu: load a eBPF program on cpumap Lorenzo Bianconi
2020-07-14 13:56 ` [PATCH v7 bpf-next 9/9] selftest: add tests for XDP programs in CPUMAP entries Lorenzo Bianconi
2020-07-14 15:19 ` [PATCH v7 bpf-next 0/9] introduce support for XDP programs in CPUMAP Alexei Starovoitov
2020-07-14 15:35 ` Lorenzo Bianconi
2020-07-16 16:27 ` Daniel Borkmann
2020-07-17 10:00 ` Jakub Sitnicki
2020-07-17 10:08 ` Jakub Sitnicki
2020-07-17 11:06 ` Lorenzo Bianconi
2020-07-17 11:01 ` Lorenzo Bianconi
2020-07-17 15:13 ` Jakub Sitnicki
2020-07-17 16:31 ` Lorenzo Bianconi [this message]
2020-07-17 19:12 ` Lorenzo Bianconi
2020-07-17 23:13 ` Alexei Starovoitov
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