From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9C58BC433DF for ; Fri, 17 Jul 2020 11:01:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6893D2076A for ; Fri, 17 Jul 2020 11:01:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1594983702; bh=+J7UJFmB74hYyjfhgJTFmQuUH6HDep+7PP15V9QLMrc=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=2YSMwHugYeqxB66CTGo2knD+e961HK6/FgtXbbRlFeskKt7/8D4ae24x4w2uWjg3j jA9vFbteKHEY8pogjJ5Ty926BLMQEiiwDYzO+YR+vgCMr6D32ZEK49hR5DCoZKc/po sNxxNdf2iBrk+X+rcSVT2KATCt5b4obfSnRR24lc= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726070AbgGQLBm (ORCPT ); Fri, 17 Jul 2020 07:01:42 -0400 Received: from mail.kernel.org ([198.145.29.99]:55074 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725932AbgGQLBl (ORCPT ); Fri, 17 Jul 2020 07:01:41 -0400 Received: from localhost (unknown [151.48.133.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 7F09820717; Fri, 17 Jul 2020 11:01:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1594983701; bh=+J7UJFmB74hYyjfhgJTFmQuUH6HDep+7PP15V9QLMrc=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=1dVarzCM7nm6Jv3fpjeao1lAMHRTYUFKgnmRtAb8+z/VWCM8/h8r2+k9GtC2qfVGy SjxdVYKi39sdjvyQ3AxK0QGUX1dpbDiNDOjg1WTKPc6s7G4mpPOW5cYP6hA7dTd4V4 YlrQM4MdbocJqI9rWkGtqSTAbkfGbmg1CDdtrmNQ= Date: Fri, 17 Jul 2020 13:01:36 +0200 From: Lorenzo Bianconi To: Jakub Sitnicki 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 Message-ID: <20200717110136.GA1683270@localhost.localdomain> References: <20200717120013.0926a74e@toad> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="FCuugMFkClbJLl1L" Content-Disposition: inline In-Reply-To: <20200717120013.0926a74e@toad> Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org --FCuugMFkClbJLl1L Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable [...] > This started showing up with when running ./test_progs from recent > bpf-next (bfdfa51702de). Any chance it is related? >=20 > [ 2950.440613] =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D >=20 > [ 3073.281578] INFO: task cpumap/0/map:26:536 blocked for more than 860 s= econds. > [ 3073.285492] Tainted: G W 5.8.0-rc4-01471-g15d51f3= a516b #814 > [ 3073.289177] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disable= s 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: deb= ug_show_all_locks+0x28/0x1c3 >=20 > [ 3073.322249] =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D Hi Jakub, can you please provide more info? can you please identify the test that tri= gger the issue? I run test_progs with bpf-next master branch and it works fine f= or me. I run the tests in a vm with 4 vcpus and 4G of memory. Regards, Lorenzo --FCuugMFkClbJLl1L Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iHUEABYIAB0WIQTquNwa3Txd3rGGn7Y6cBh0uS2trAUCXxGFDQAKCRA6cBh0uS2t rInEAQDe7/pdrv0Ie1lT9olMkBQa+KqFZXlHkNwci7VmzK5gngEApfR+jtvaZRj1 d4Zpbo4nouvJq6nnnShZPuMMVSYwswo= =0S7x -----END PGP SIGNATURE----- --FCuugMFkClbJLl1L--