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=1.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FSL_HELO_FAKE,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 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 8E47AC3A5A2 for ; Tue, 3 Sep 2019 14:27:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 5D51B23711 for ; Tue, 3 Sep 2019 14:27:39 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=android.com header.i=@android.com header.b="ESXVtTHU" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729591AbfICO1i (ORCPT ); Tue, 3 Sep 2019 10:27:38 -0400 Received: from mail-wm1-f66.google.com ([209.85.128.66]:35992 "EHLO mail-wm1-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728571AbfICO1h (ORCPT ); Tue, 3 Sep 2019 10:27:37 -0400 Received: by mail-wm1-f66.google.com with SMTP id p13so18564415wmh.1 for ; Tue, 03 Sep 2019 07:27:35 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=android.com; s=20161025; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=ztizy0u6H258Ae8Jp90WnU8QSxT6Zt2zjZWBgoNCqd4=; b=ESXVtTHUIucPYUIW1KPWDFAOdL8m9NXsKyjVChp9ailvsURMWpL7cAjJpYWKtpfyjo aTUNFlhzx6/Uq94sFsvnuBW77/sqooIEgBNaNA4TsxyKcHoNmQS0YMQyxnbuPyrmZOPR cpErI4PE/vbSEEH5mbgzmNSiX7hRQGC7xEm+EbJGk1tC92VvuI0loiD31fgwhPjboX3a qJo6ZVACakyH82ZNpOAXG9DIdiVdv3mn9Fsm73/XCSgMszSoIvOySfYbCxJC3P+zXxzo OKGPDAeu/vXEfiXZ6b7vjDUb+xgQ9uLTU9sZSBed+ptPt9/IqNFyFw/YCSGsthvlUds+ xeHw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to:user-agent; bh=ztizy0u6H258Ae8Jp90WnU8QSxT6Zt2zjZWBgoNCqd4=; b=bu6X7HE6qjZoe9mgOesm13Yi6igf1fUcjoG99g3DpPt+Db25chEAb+op/YSbru9qHx YeVBwo/L3qqrPWPAkwmiitFwIJy197lNROy2BMEsMHt0euzHpBohJHYPc4rob2BJKO5i gLe6rkdqgUoe5eV8MiVj2vU696lm9ntq6BdDuMn4kr4UfDrdk3047jQdhfYbk4TRB+8s dKzFLjd2SKd2DVAPrUMYPOfTNeEKVIX47mzOPgd98pZaQ6GeYb0fjJov8MwxWrGr72hG NQ/INjhRcI/XLaWWNSNQuAqT6FJqJ4MGqjwJntmg+fk+ZSwWibjxM864TjI6klHN8/I0 x5bQ== X-Gm-Message-State: APjAAAXfT3xeVe+MZqXc8ZmD3667KXdLpxmngnrjo1q7TGs0ZO2sX6Gh VdfmshKKJ7WoUN5qeL/In4Gcsw== X-Google-Smtp-Source: APXvYqxwSZ6oVFY6ZQ+MXwrwDJGE2SrgSvya83qum4+mf2S+HXiY1Ja9udjVszHndrpe58MWjHIOPw== X-Received: by 2002:a7b:c1cc:: with SMTP id a12mr355823wmj.73.1567520855044; Tue, 03 Sep 2019 07:27:35 -0700 (PDT) Received: from google.com ([2a00:79e0:d:210:e751:37a0:1e95:e65d]) by smtp.gmail.com with ESMTPSA id n1sm862908wrg.67.2019.09.03.07.27.34 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 03 Sep 2019 07:27:34 -0700 (PDT) Date: Tue, 3 Sep 2019 15:27:32 +0100 From: Alessio Balsini To: Peter Zijlstra Cc: mingo@kernel.org, juri.lelli@redhat.com, linux-kernel@vger.kernel.org, dietmar.eggemann@arm.com, luca.abeni@santannapisa.it, bristot@redhat.com, dvyukov@google.com, tglx@linutronix.de, vpillai@digitalocean.com, rostedt@goodmis.org Subject: Re: [RFC][PATCH 00/13] SCHED_DEADLINE server infrastructure Message-ID: <20190903142732.GA35593@google.com> References: <20190726145409.947503076@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190726145409.947503076@infradead.org> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Peter, While testing your series (peterz/sched/wip-deadline 7a9e91d3fe951), I ended up in a panic at boot on a x86_64 kvm guest, would you please have a look? Here attached the backtrace. Happy to test any suggestion that fixes the issue. Thanks, Alessio --- ------>8------ [ 0.798326] ------------[ cut here ]------------ [ 0.798328] kernel BUG at kernel/sched/deadline.c:1542! [ 0.798335] invalid opcode: 0000 [#1] SMP PTI [ 0.798339] CPU: 4 PID: 0 Comm: swapper/4 Not tainted 5.3.0-rc6+ #28 [ 0.798340] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 0.798349] RIP: 0010:enqueue_dl_entity+0x3f8/0x440 [ 0.798351] Code: ff 48 8b 85 60 0a 00 00 8b 48 28 85 c9 0f 85 99 fd ff ff c7 40 28 01 00 00 00 e9 8d fd ff ff 85 c0 75 20 f [ 0.798353] RSP: 0000:ffffb68e40154f10 EFLAGS: 00010096 [ 0.798356] RAX: 0000000000000020 RBX: ffff974bc74d0c00 RCX: ffff974bc751b200 [ 0.798358] RDX: 0000000000000001 RSI: ffff974bc7929410 RDI: ffff974bc7929410 [ 0.798359] RBP: 0000000000000009 R08: 00000000a73eb274 R09: 00000000000f4887 [ 0.798361] R10: 0000000000000000 R11: 0000000000000000 R12: ffff974bc74d0c80 [ 0.798362] R13: 0000000000000000 R14: ffff974bc74d0d00 R15: 0000000000000000 [ 0.798365] FS: 0000000000000000(0000) GS:ffff974bc7900000(0000) knlGS:0000000000000000 [ 0.798371] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 0.798372] CR2: 00000000ffffffff CR3: 000000000480a000 CR4: 00000000000006e0 [ 0.798374] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 0.798375] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 0.798376] Call Trace: [ 0.798397] [ 0.798402] enqueue_task_fair+0xe69/0x11d0 [ 0.798407] activate_task+0x58/0x90 [ 0.798412] ? kvm_sched_clock_read+0xd/0x20 [ 0.798416] ttwu_do_activate.isra.96+0x3a/0x50 [ 0.798420] sched_ttwu_pending+0x5e/0x90 [ 0.798424] scheduler_ipi+0x9f/0x120 [ 0.798430] reschedule_interrupt+0xf/0x20 [ 0.798432] [ 0.798436] RIP: 0010:default_idle+0x20/0x140 [ 0.798438] Code: 90 90 90 90 90 90 90 90 90 90 41 55 41 54 55 65 8b 2d f4 40 d7 70 53 0f 1f 44 00 00 e9 07 00 00 00 0f 00 5 [ 0.798440] RSP: 0000:ffffb68e40083ec0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff02 [ 0.798442] RAX: ffffffff8f29c250 RBX: 0000000000000004 RCX: ffff974bc7916000 [ 0.798444] RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffff974bc791ca80 [ 0.798445] RBP: 0000000000000004 R08: 000000009d74022b R09: 0000004d7ebb5820 [ 0.798447] R10: 0000000000000400 R11: 0000000000000400 R12: 0000000000000000 [ 0.798448] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 0.798451] ? __cpuidle_text_start+0x8/0x8 [ 0.798455] do_idle+0x19e/0x210 [ 0.798458] cpu_startup_entry+0x14/0x20 [ 0.798464] start_secondary+0x144/0x170 [ 0.798467] secondary_startup_64+0xa4/0xb0 [ 0.798469] Modules linked in: [ 0.798478] ---[ end trace c2be7729c78a55ad ]--- [ 0.798482] RIP: 0010:enqueue_dl_entity+0x3f8/0x440 [ 0.798484] Code: ff 48 8b 85 60 0a 00 00 8b 48 28 85 c9 0f 85 99 fd ff ff c7 40 28 01 00 00 00 e9 8d fd ff ff 85 c0 75 20 f [ 0.798485] RSP: 0000:ffffb68e40154f10 EFLAGS: 00010096 [ 0.798487] RAX: 0000000000000020 RBX: ffff974bc74d0c00 RCX: ffff974bc751b200 [ 0.798489] RDX: 0000000000000001 RSI: ffff974bc7929410 RDI: ffff974bc7929410 [ 0.798490] RBP: 0000000000000009 R08: 00000000a73eb274 R09: 00000000000f4887 [ 0.798491] R10: 0000000000000000 R11: 0000000000000000 R12: ffff974bc74d0c80 [ 0.798493] R13: 0000000000000000 R14: ffff974bc74d0d00 R15: 0000000000000000 [ 0.798495] FS: 0000000000000000(0000) GS:ffff974bc7900000(0000) knlGS:0000000000000000 [ 0.798500] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 0.798501] CR2: 00000000ffffffff CR3: 000000000480a000 CR4: 00000000000006e0 [ 0.798502] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 0.798504] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 0.798505] Kernel panic - not syncing: Fatal exception in interrupt [ 0.799522] Kernel Offset: 0xd800000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) [ 0.875144] ---[ end Kernel panic - not syncing: Fatal exception in interrupt ]--- ------8<------