From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 7880 invoked by alias); 20 May 2009 09:44:23 -0000 Received: (qmail 7873 invoked by uid 22791); 20 May 2009 09:44:22 -0000 X-SWARE-Spam-Status: No, hits=-0.5 required=5.0 tests=BAYES_05,J_CHICKENPOX_73 X-Spam-Check-By: sourceware.org Received: from e4.ny.us.ibm.com (HELO e4.ny.us.ibm.com) (32.97.182.144) by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Wed, 20 May 2009 09:44:19 +0000 Received: from d01relay02.pok.ibm.com (d01relay02.pok.ibm.com [9.56.227.234]) by e4.ny.us.ibm.com (8.13.1/8.13.1) with ESMTP id n4K9doCe019855 for ; Wed, 20 May 2009 05:39:50 -0400 Received: from d01av04.pok.ibm.com (d01av04.pok.ibm.com [9.56.224.64]) by d01relay02.pok.ibm.com (8.13.8/8.13.8/NCO v9.2) with ESMTP id n4K9iCiv152818 for ; Wed, 20 May 2009 05:44:12 -0400 Received: from d01av04.pok.ibm.com (loopback [127.0.0.1]) by d01av04.pok.ibm.com (8.12.11.20060308/8.13.3) with ESMTP id n4K9iB9r019094 for ; Wed, 20 May 2009 05:44:12 -0400 Received: from [9.124.35.83] ([9.124.35.83]) by d01av04.pok.ibm.com (8.12.11.20060308/8.12.11) with ESMTP id n4K9i8aN019042; Wed, 20 May 2009 05:44:09 -0400 Subject: BUG: [preempt-rt] scheduling while atomic: stapio From: Kiran To: systemtap@sources.redhat.com Cc: sripathi@in.ibm.com Content-Type: text/plain Date: Wed, 20 May 2009 09:44:00 -0000 Message-Id: <1242812648.13247.12.camel@kiran-laptop> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Mailing-List: contact systemtap-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Post: List-Help: , Sender: systemtap-owner@sourceware.org X-SW-Source: 2009-q2/txt/msg00635.txt.bz2 Hi, I am getting the following bug report in dmesg when I run pfaults.stp script in the systemtap.examples/memory. I am using systemtap-0.9.7 and kernel version is 2.6.29-rt4. BUG: scheduling while atomic: stapio/0x00000001/26142, CPU#3 Modules linked in: stap_246f93f30a500769142af9987624737a_5072 ipv6 autofs4 i2c_dev i2c_core hidp rfcomm l2cap bluetooth sunrpc dm_mirror dm_region_hash dm_log dm_multipath scsi_dh dm_mod video output sbs sbshc battery ac parport_pc lp parport sg bnx2 serio_raw button shpchp k8temp hwmon pcspkr mptsas mptscsih scsi_transport_sas mptbase sd_mod scsi_mod ext3 jbd mbcache uhci_hcd ohci_hcd ehci_hcd [last unloaded: stap_8455b451d15976a5e16919831aef7e51_3974] Pid: 26142, comm: stapio Not tainted 2.6.29.1-rt4 #1 Call Trace: [] __schedule_bug+0x6f/0x8a [] __schedule+0x9f/0x94a [] schedule+0x1d/0x46 [] schedule_timeout+0x37/0x1a9 [] ? check_preempt_wakeup+0x138/0x16e [] wait_for_common+0xcb/0x159 [] ? default_wake_function+0x0/0x38 [] wait_for_completion+0x2b/0x41 [] __synchronize_sched+0x57/0x72 [] ? wakeme_after_rcu+0x0/0x36 [] ? srcu_readers_active_idx+0x5e/0x89 [] synchronize_srcu+0x6f/0x96 [] srcu_notifier_chain_unregister+0x60/0x82 [] cpufreq_unregister_notifier+0x35/0x5c [] _stp_kill_time+0xb6/0xbd [stap_246f93f30a500769142af9987624737a_5072] [] probe_1391+0x3c/0xa8 [stap_246f93f30a500769142af9987624737a_5072] [] enter_end_probe+0x14a/0x1e3 [stap_246f93f30a500769142af9987624737a_5072] [] _stp_cleanup_and_exit+0x2df/0x2f8 [stap_246f93f30a500769142af9987624737a_5072] [] _stp_ctl_write_cmd+0x460/0x7f8 [stap_246f93f30a500769142af9987624737a_5072] [] ? __wake_up+0x4d/0x6e [] ? tty_ldisc_deref+0x74/0x8f [] ? security_file_permission+0x24/0x3a [] vfs_write+0xc1/0x180 [] sys_write+0x56/0x93 [] system_call_fastpath+0x16/0x1b Could someone please provide pointers on the cause of this bug?