| From 6ecafa8ec329a7891d96a0cc5a9091cf69491ea6 Mon Sep 17 00:00:00 2001 |
| From: Ingo Molnar <mingo@elte.hu> |
| Date: Fri, 3 Jul 2009 08:30:32 -0500 |
| Subject: [PATCH] trace: disable workqueue tracer on RT |
| |
| commit 9026677c72e1f3c1682ccd461d80f9467f13b8e4 in tip. |
| |
| Turn it off for now: |
| |
| BUG: sleeping function called from invalid context at kernel/rtmutex.c:683 |
| in_atomic(): 1, irqs_disabled(): 0, pid: 1, name: init |
| 1 lock held by init/1: |
| #0: (&cwq->lock){--..}, at: [<ffffffff8025e6f1>] __queue_work+0x21/0x50 |
| Pid: 1, comm: init Not tainted 2.6.29-rc4-rt0-tip #186 |
| Call Trace: |
| [<ffffffff802765d3>] ? __debug_show_held_locks+0x13/0x30 |
| [<ffffffff80238fc1>] __might_sleep+0x141/0x180 |
| [<ffffffff805c0c26>] __lock_text_start+0x56/0xd0 |
| [<ffffffff8020c6d6>] ? ftrace_call+0x5/0x2b |
| [<ffffffff802aabd8>] probe_workqueue_insertion+0x18/0xc0 |
| [<ffffffff8025e197>] insert_work+0x87/0x190 |
| [<ffffffff8025e703>] __queue_work+0x33/0x50 |
| [<ffffffff8025e84f>] queue_work_on+0xaf/0xc0 |
| [<ffffffff8025e896>] queue_work+0x16/0x20 |
| [<ffffffff8025db2f>] call_usermodehelper_exec+0xff/0x130 |
| [<ffffffff8026ccfc>] ? prepare_usermodehelper_creds+0x15c/0x180 |
| [<ffffffff8026ccfc>] ? prepare_usermodehelper_creds+0x15c/0x180 |
| [<ffffffff803af071>] kobject_uevent_env+0x8f1/0x900 |
| [<ffffffff8020c6d6>] ? ftrace_call+0x5/0x2b |
| [<ffffffff803af08b>] kobject_uevent+0xb/0x10 |
| [<ffffffff8040f373>] device_add+0x793/0xa70 |
| [<ffffffff8040f66e>] device_register+0x1e/0x30 |
| [<ffffffff8040f8de>] device_create_vargs+0x13e/0x180 |
| [<ffffffff8040f951>] device_create+0x31/0x40 |
| [<ffffffff8020c6d6>] ? ftrace_call+0x5/0x2b |
| [<ffffffff803eb30b>] vcs_make_sysfs+0x3b/0x70 |
| [<ffffffff803f4e18>] con_open+0x128/0x160 |
| [<ffffffff803dda5d>] tty_open+0x2fd/0x7a0 |
| [<ffffffff802ef8f5>] chrdev_open+0x185/0x230 |
| [<ffffffff802ef770>] ? chrdev_open+0x0/0x230 |
| [<ffffffff802e823f>] __dentry_open+0x1ff/0x4c0 |
| [<ffffffff802e862c>] nameidata_to_filp+0x4c/0x80 |
| [<ffffffff802fc86e>] do_filp_open+0x39e/0xd20 |
| [<ffffffff805c2aa4>] ? __spin_unlock_irqrestore+0x74/0xb0 |
| [<ffffffff805bf8da>] ? rt_spin_lock_slowunlock+0x5a/0xa0 |
| [<ffffffff8030bab4>] ? alloc_fd+0xa4/0x1e0 |
| [<ffffffff802e7f43>] do_sys_open+0xd3/0x160 |
| [<ffffffff802e8010>] sys_open+0x20/0x30 |
| [<ffffffff8020ca48>] system_call_fastpath+0x16/0x1b |
| |
| Signed-off-by: Ingo Molnar <mingo@elte.hu> |
| Signed-off-by: Thomas Gleixner <tglx@linutronix.de> |
| Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> |
| |
| diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig |
| index 60e2ce0..6929bc7 100644 |
| --- a/kernel/trace/Kconfig |
| +++ b/kernel/trace/Kconfig |
| @@ -412,7 +412,7 @@ config KMEMTRACE |
| If unsure, say N. |
| |
| config WORKQUEUE_TRACER |
| - bool "Trace workqueues" |
| + bool "Trace workqueues" if !PREEMPT_RT |
| select GENERIC_TRACER |
| help |
| The workqueue tracer provides some statistical information |
| -- |
| 1.7.1.1 |
| |