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 13:01:36 +0200 [thread overview]
Message-ID: <20200717110136.GA1683270@localhost.localdomain> (raw)
In-Reply-To: <20200717120013.0926a74e@toad>
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[...]
> This started showing up with when running ./test_progs from recent
> bpf-next (bfdfa51702de). Any chance it is related?
>
> [ 2950.440613] =============================================
>
> [ 3073.281578] INFO: task cpumap/0/map:26:536 blocked for more than 860 seconds.
> [ 3073.285492] Tainted: G W 5.8.0-rc4-01471-g15d51f3a516b #814
> [ 3073.289177] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
> [ 3073.293021] cpumap/0/map:26 D 0 536 2 0x00004000
> [ 3073.295755] Call Trace:
> [ 3073.297143] __schedule+0x5ad/0xf10
> [ 3073.299032] ? pci_mmcfg_check_reserved+0xd0/0xd0
> [ 3073.301416] ? static_obj+0x31/0x80
> [ 3073.303277] ? mark_held_locks+0x24/0x90
> [ 3073.305313] ? cpu_map_update_elem+0x6d0/0x6d0
> [ 3073.307544] schedule+0x6f/0x160
> [ 3073.309282] schedule_preempt_disabled+0x14/0x20
> [ 3073.311593] kthread+0x175/0x240
> [ 3073.313299] ? kthread_create_on_node+0xd0/0xd0
> [ 3073.315106] ret_from_fork+0x1f/0x30
> [ 3073.316365]
> Showing all locks held in the system:
> [ 3073.318423] 1 lock held by khungtaskd/33:
> [ 3073.319642] #0: ffffffff82d246a0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x28/0x1c3
>
> [ 3073.322249] =============================================
Hi Jakub,
can you please provide more info? can you please identify the test that trigger
the issue? I run test_progs with bpf-next master branch and it works fine for me.
I run the tests in a vm with 4 vcpus and 4G of memory.
Regards,
Lorenzo
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next prev parent reply other threads:[~2020-07-17 11:01 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 [this message]
2020-07-17 15:13 ` Jakub Sitnicki
2020-07-17 16:31 ` Lorenzo Bianconi
2020-07-17 19:12 ` Lorenzo Bianconi
2020-07-17 23:13 ` Alexei Starovoitov
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