From: "Toke Høiland-Jørgensen" <toke@redhat.com>
To: Andrii Nakryiko <andrii.nakryiko@gmail.com>
Cc: Jakub Sitnicki <jakub@cloudflare.com>,
Alexei Starovoitov <alexei.starovoitov@gmail.com>,
Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
Martin KaFai Lau <kafai@fb.com>, Song Liu <songliubraving@fb.com>,
Yonghong Song <yhs@fb.com>, Andrii Nakryiko <andriin@fb.com>,
John Fastabend <john.fastabend@gmail.com>,
Jiri Olsa <jolsa@redhat.com>,
Eelco Chaudron <echaudro@redhat.com>,
KP Singh <kpsingh@chromium.org>,
Networking <netdev@vger.kernel.org>, bpf <bpf@vger.kernel.org>
Subject: Re: [PATCH bpf-next v8 04/11] bpf: move prog->aux->linked_prog and trampoline into bpf_link on attach
Date: Fri, 25 Sep 2020 01:13:53 +0200 [thread overview]
Message-ID: <87mu1ebwem.fsf@toke.dk> (raw)
In-Reply-To: <CAEf4Bza38tR1GvyLzzzzv6zT8B-_gM_jhTqK_c7+e1ciU3ZA1w@mail.gmail.com>
Andrii Nakryiko <andrii.nakryiko@gmail.com> writes:
>> [root@(none) bpf]# ./test_progs -t map_in_map
>> test_lookup_update:PASS:skel_open 0 nsec
>> test_lookup_update:PASS:skel_attach 0 nsec
>> test_lookup_update:PASS:inner1 0 nsec
>> test_lookup_update:PASS:inner2 0 nsec
>> test_lookup_update:PASS:inner1 0 nsec
>> test_lookup_update:PASS:inner2 0 nsec
>> test_lookup_update:PASS:map1_id 0 nsec
>> test_lookup_update:PASS:map2_id 0 nsec
>> kern_sync_rcu:PASS:inner_map_create 0 nsec
>> kern_sync_rcu:PASS:outer_map_create 0 nsec
>> kern_sync_rcu:PASS:outer_map_update 0 nsec
>> test_lookup_update:PASS:sync_rcu 0 nsec
>> kern_sync_rcu:PASS:inner_map_create 0 nsec
>> kern_sync_rcu:PASS:outer_map_create 0 nsec
>> kern_sync_rcu:PASS:outer_map_update 0 nsec
>> test_lookup_update:PASS:sync_rcu 0 nsec
>
> try adding sleep(few seconds, enough for RCU grace period to pass)
> here and see if that helps
>
> if not, please printk() around to see why the inner_map1 wasn't freed
Aha, found it! It happened because my kernel was built with
PREEMPT_VOLUNTARY. Changing that to PREEMPT fixed the test, and got me
to:
Summary: 116/853 PASSED, 14 SKIPPED, 0 FAILED
So yay! Thanks for your help with debugging :)
-Toke
next prev parent reply other threads:[~2020-09-24 23:14 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-22 18:38 [PATCH bpf-next v8 00/11] bpf: Support multi-attach for freplace programs Toke Høiland-Jørgensen
2020-09-22 18:38 ` [PATCH bpf-next v8 01/11] bpf: disallow attaching modify_return tracing functions to other BPF programs Toke Høiland-Jørgensen
2020-09-23 17:25 ` Andrii Nakryiko
2020-09-22 18:38 ` [PATCH bpf-next v8 02/11] bpf: change logging calls from verbose() to bpf_log() and use log pointer Toke Høiland-Jørgensen
2020-09-22 18:38 ` [PATCH bpf-next v8 03/11] bpf: verifier: refactor check_attach_btf_id() Toke Høiland-Jørgensen
2020-09-23 23:54 ` Alexei Starovoitov
2020-09-22 18:38 ` [PATCH bpf-next v8 04/11] bpf: move prog->aux->linked_prog and trampoline into bpf_link on attach Toke Høiland-Jørgensen
2020-09-24 0:14 ` Alexei Starovoitov
2020-09-24 14:34 ` Toke Høiland-Jørgensen
2020-09-24 15:43 ` Alexei Starovoitov
2020-09-24 21:30 ` Toke Høiland-Jørgensen
2020-09-24 20:40 ` Andrii Nakryiko
2020-09-24 21:24 ` Toke Høiland-Jørgensen
2020-09-24 21:59 ` Andrii Nakryiko
2020-09-24 22:20 ` Toke Høiland-Jørgensen
2020-09-24 22:37 ` Andrii Nakryiko
2020-09-24 23:13 ` Toke Høiland-Jørgensen [this message]
2020-09-24 21:59 ` Toke Høiland-Jørgensen
2020-09-25 15:45 ` Alexei Starovoitov
2020-09-25 20:57 ` Toke Høiland-Jørgensen
2020-09-22 18:38 ` [PATCH bpf-next v8 05/11] bpf: support attaching freplace programs to multiple attach points Toke Høiland-Jørgensen
2020-09-24 1:04 ` Alexei Starovoitov
2020-09-22 18:38 ` [PATCH bpf-next v8 06/11] bpf: Fix context type resolving for extension programs Toke Høiland-Jørgensen
2020-09-22 18:38 ` [PATCH bpf-next v8 07/11] libbpf: add support for freplace attachment in bpf_link_create Toke Høiland-Jørgensen
2020-09-23 17:28 ` Andrii Nakryiko
2020-09-23 20:58 ` Toke Høiland-Jørgensen
2020-09-22 18:38 ` [PATCH bpf-next v8 08/11] selftests: add test for multiple attachments of freplace program Toke Høiland-Jørgensen
2020-09-22 18:38 ` [PATCH bpf-next v8 09/11] selftests/bpf: Adding test for arg dereference in extension trace Toke Høiland-Jørgensen
2020-09-22 18:38 ` [PATCH bpf-next v8 10/11] selftests: Add selftest for disallowing modify_return attachment to freplace Toke Høiland-Jørgensen
2020-09-22 18:38 ` [PATCH bpf-next v8 11/11] selftests: Remove fmod_ret from benchmarks and test_overhead Toke Høiland-Jørgensen
2020-09-23 17:40 ` Andrii Nakryiko
2020-09-24 1:08 ` Alexei Starovoitov
2020-09-24 1:38 ` Andrii Nakryiko
2020-09-24 23:19 ` Toke Høiland-Jørgensen
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