Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757803AbaDXPVT (ORCPT ); Thu, 24 Apr 2014 11:21:19 -0400 Received: from mx1.redhat.com ([209.132.183.28]:27293 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757262AbaDXPVQ (ORCPT ); Thu, 24 Apr 2014 11:21:16 -0400 Date: Thu, 24 Apr 2014 11:21:04 -0400 From: Dave Jones To: Linux Kernel Cc: Peter Zijlstra Subject: return of perf task_ctx_sched_out bug. Message-ID: <20140424152104.GA13144@redhat.com> Mail-Followup-To: Dave Jones , Linux Kernel , Peter Zijlstra MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org I haven't seen this in a while. WARNING: CPU: 0 PID: 25574 at kernel/events/core.c:2384 task_ctx_sched_out+0x6b/0x80() Modules linked in: 8021q garp dccp_ipv4 dccp bridge stp snd_seq_dummy sctp fuse hidp bnep tun rfcomm llc2 af_key nfnetlink scsi_transport_iscsi ipt_ULOG can_bcm can_raw nfc caif_socket caif af_802154 ieee802154 phonet af_rxrpc can pppoe pppox ppp_generic slhc irda crc_ccitt rds rose x25 atm netrom appletalk ipx p8023 psnap p8022 llc ax25 cfg80211 coretemp hwmon x86_pkg_temp_thermal kvm_intel kvm snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic snd_hda_intel snd_hda_controller xfs snd_hda_codec snd_hwdep e1000e libcrc32c crct10dif_pclmul snd_seq snd_seq_device crc32c_intel snd_pcm btusb bluetooth ghash_clmulni_intel snd_timer snd ptp pcspkr pps_core serio_raw microcode shpchp 6lowpan_iphc usb_debug rfkill soundcore CPU: 0 PID: 25574 Comm: trinity-c76 Not tainted 3.15.0-rc2+ #197 0000000000000009 000000006f572b93 ffff8802389b3df0 ffffffff8b74671d 0000000000000000 ffff8802389b3e28 ffffffff8b06d45d ffff8802441d7ad8 ffff880111e6adf0 0000000000000286 ffff88023fb8b5c0 ffff880111e6adf0 Call Trace: [] dump_stack+0x4e/0x7a [] warn_slowpath_common+0x7d/0xa0 [] warn_slowpath_null+0x1a/0x20 [] task_ctx_sched_out+0x6b/0x80 [] perf_event_comm+0x108/0x260 [] ? perf_event_fork+0x20/0x20 [] ? lock_release_holdtime.part.24+0xe6/0x160 [] ? get_parent_ip+0xd/0x50 [] set_task_comm+0x4f/0xc0 [] SyS_prctl+0x1d9/0x480 [] tracesys+0xdd/0xe2 Last time you looked into this, you had me run some debug patches, which caused a bunch of spew: http://permalink.gmane.org/gmane.linux.kernel/1648614 I've not been running with that patch since then, but if it's going to be useful I can try and resurrect it. Dave -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/