From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757325AbcAJT0L (ORCPT ); Sun, 10 Jan 2016 14:26:11 -0500 Received: from aserp1040.oracle.com ([141.146.126.69]:40328 "EHLO aserp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751509AbcAJT0J (ORCPT ); Sun, 10 Jan 2016 14:26:09 -0500 To: Peter Zijlstra , Ingo Molnar , acme@ghostprotocols.net Cc: LKML From: Sasha Levin Subject: perf: WARNING: CPU: 1 PID: 3691 at kernel/events/core.c:2647 task_ctx_sched_out+0x195/0x1f0() X-Enigmail-Draft-Status: N1110 Message-ID: <5692AFFE.1040007@oracle.com> Date: Sun, 10 Jan 2016 14:24:46 -0500 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.4.0 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-Source-IP: aserv0022.oracle.com [141.146.126.234] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi all, While fuzzing with trinity inside a KVM tools guest, running the latest -next kernel, I've hit the following warning: [ 394.086642] WARNING: CPU: 1 PID: 3691 at kernel/events/core.c:2647 task_ctx_sched_out+0x195/0x1f0() [ 394.087732] Modules linked in: [ 394.088190] CPU: 1 PID: 3691 Comm: trinity-c95 Not tainted 4.4.0-rc8-next-20160108-sasha-00024-gaaecb9a #2780 [ 394.089354] 1ffff100387d8f19 0000000036fa75d1 ffff8801c3ec7948 ffffffff8301a182 [ 394.090283] 0000000041b58ab3 ffffffff8e1b3838 ffffffff8301a0b7 0000000000000000 [ 394.091266] ffff8801c44fc500 0000000036fa75d1 ffffffff8145d240 0000000000000001 [ 394.092247] Call Trace: [ 394.092604] dump_stack (lib/dump_stack.c:52) [ 394.094810] warn_slowpath_common (kernel/panic.c:484) [ 394.095570] ? task_ctx_sched_out (kernel/events/core.c:2647 (discriminator 3)) [ 394.096385] warn_slowpath_null (kernel/panic.c:518) [ 394.097134] task_ctx_sched_out (kernel/events/core.c:2647 (discriminator 3)) [ 394.097900] perf_event_exit_task (kernel/events/core.c:8756 kernel/events/core.c:8821) [ 394.101501] do_exit (kernel/exit.c:759) [ 394.105344] do_group_exit (kernel/exit.c:862) [ 394.106053] get_signal (kernel/signal.c:2307) [ 394.106740] do_signal (arch/x86/kernel/signal.c:781) [ 394.112553] exit_to_usermode_loop (arch/x86/entry/common.c:249) [ 394.113311] syscall_return_slowpath (./arch/x86/include/asm/jump_label.h:35 include/linux/context_tracking_state.h:30 include/linux/context_tracking.h:24 arch/x86/entry/common.c:284 arch/x86/entry/common.c:344) [ 394.114111] int_ret_from_sys_call (arch/x86/entry/entry_64.S:282) Thanks, Sasha