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From: Fengguang Wu <fengguang.wu@intel.com>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
	Russell King - ARM Linux <linux@arm.linux.org.uk>,
	xen-devel@lists.xenproject.org,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	Dave Jones <davej@redhat.com>
Subject: [PATCH] kobject: show debug info on delayed kobject release
Date: Wed, 9 Oct 2013 09:26:21 +0800	[thread overview]
Message-ID: <20131009012621.GA7126@localhost> (raw)
In-Reply-To: <20131009011833.GA14579@redhat.com>

Useful for locating buggy drivers on kernel oops.

It may add dozens of new lines to boot dmesg. DEBUG_KOBJECT_RELEASE is
hopefully only enabled in debug kernels (like maybe the Fedora rawhide
one, or at developers), so being a bit more verbose is likely ok.

CC: Russell King - ARM Linux <linux@arm.linux.org.uk>
CC: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
---
 lib/kobject.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/kobject.c b/lib/kobject.c
index 669bf19..084f7b1 100644
--- a/lib/kobject.c
+++ b/lib/kobject.c
@@ -592,7 +592,7 @@ static void kobject_release(struct kref *kref)
 {
 	struct kobject *kobj = container_of(kref, struct kobject, kref);
 #ifdef CONFIG_DEBUG_KOBJECT_RELEASE
-	pr_debug("kobject: '%s' (%p): %s, parent %p (delayed)\n",
+	pr_info("kobject: '%s' (%p): %s, parent %p (delayed)\n",
 		 kobject_name(kobj), kobj, __func__, kobj->parent);
 	INIT_DELAYED_WORK(&kobj->release, kobject_delayed_cleanup);
 	schedule_delayed_work(&kobj->release, HZ);
-- 
1.7.10.4


  reply	other threads:[~2013-10-09  1:26 UTC|newest]

Thread overview: 82+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-10-06  8:23 [xen] double fault: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC Fengguang Wu
2013-10-06 17:26 ` Linus Torvalds
2013-10-06 17:26 ` Linus Torvalds
2013-10-07  2:11   ` Fengguang Wu
2013-10-07  2:11   ` Fengguang Wu
2013-10-07  5:10     ` Fengguang Wu
2013-10-07  5:10     ` Fengguang Wu
2013-10-07  8:12       ` Linus Torvalds
2013-10-07  8:12       ` Linus Torvalds
2013-10-07  8:35         ` Fengguang Wu
2013-10-07 22:14           ` Linus Torvalds
2013-10-07 22:29             ` Russell King - ARM Linux
2013-10-07 23:33               ` Russell King - ARM Linux
2013-10-07 23:33               ` Russell King - ARM Linux
2013-10-07 22:29             ` Russell King - ARM Linux
2013-10-07 23:47             ` Linus Torvalds
2013-10-08  2:09               ` Fengguang Wu
2013-10-08  2:14                 ` Fengguang Wu
2013-10-08  2:14                 ` Fengguang Wu
2013-10-08  2:36                   ` Fengguang Wu
2013-10-08  3:07                     ` Linus Torvalds
2013-10-08  3:07                     ` Linus Torvalds
2013-10-08  2:36                   ` Fengguang Wu
2013-10-08  2:51                   ` Linus Torvalds
2013-10-08  2:51                   ` Linus Torvalds
2013-10-08  3:11                     ` Fengguang Wu
2013-10-08  3:29                       ` Linus Torvalds
2013-10-08  3:35                         ` Fengguang Wu
2013-10-08  3:35                         ` Fengguang Wu
2013-10-08  4:35                           ` [DRM_CURRUS_QEMU/timer] WARNING: CPU: 0 PID: 1 at debug_print_object() Fengguang Wu
2013-10-08  4:35                           ` Fengguang Wu
2013-10-08  3:29                       ` [xen] double fault: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC Linus Torvalds
2013-10-08 12:17                       ` Fengguang Wu
2013-10-08 12:17                       ` Fengguang Wu
2013-10-08 22:14                         ` Russell King - ARM Linux
2013-10-08 22:48                           ` Greg Kroah-Hartman
2013-10-08 22:48                           ` Greg Kroah-Hartman
2013-10-09  0:45                             ` Linus Torvalds
2013-10-09  1:18                               ` Dave Jones
2013-10-09  1:26                                 ` Fengguang Wu [this message]
2013-10-09 14:47                                   ` [PATCH] kobject: show debug info on delayed kobject release Russell King - ARM Linux
2013-10-09 14:47                                   ` Russell King - ARM Linux
2013-10-09  1:26                                 ` Fengguang Wu
2013-10-09  1:18                               ` [xen] double fault: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC Dave Jones
2013-10-09 14:12                               ` Josh Boyer
2013-10-09 14:12                               ` Josh Boyer
2013-10-09  0:45                             ` Linus Torvalds
2013-10-09  0:46                             ` Fengguang Wu
2013-10-09  0:46                             ` Fengguang Wu
2013-10-08 22:14                         ` Russell King - ARM Linux
2013-10-08  3:11                     ` Fengguang Wu
2013-10-08  8:06                   ` Russell King - ARM Linux
2013-10-08  8:06                   ` Russell King - ARM Linux
2013-10-10  2:23                     ` Dave Airlie
2013-10-10  2:23                     ` Dave Airlie
2013-10-10  2:38                       ` Linus Torvalds
2013-10-10  2:38                       ` Linus Torvalds
2013-10-10  9:19                       ` Russell King - ARM Linux
2013-10-10  9:19                       ` Russell King - ARM Linux
2013-10-10 10:53                         ` Russell King - ARM Linux
2013-10-11  3:55                           ` Dave Airlie
2013-10-11  4:28                             ` Dave Airlie
2013-10-11  4:28                             ` Dave Airlie
2013-10-11  3:55                           ` Dave Airlie
2013-10-11  5:14                           ` Fengguang Wu
2013-10-11  5:14                           ` Fengguang Wu
2013-10-23 11:20                             ` Xiong Zhou
2013-10-23 11:20                             ` Xiong Zhou
2013-10-10 10:53                         ` Russell King - ARM Linux
2013-10-08  2:43                 ` Linus Torvalds
2013-10-08  2:43                 ` Linus Torvalds
2013-10-08  2:09               ` Fengguang Wu
2013-10-07 23:47             ` Linus Torvalds
2013-10-08  7:58             ` Ingo Molnar
2013-10-08  7:58             ` Ingo Molnar
2013-10-08  8:20               ` Fengguang Wu
2013-10-08  8:20               ` Fengguang Wu
2013-10-08  8:26                 ` Ingo Molnar
2013-10-08  8:26                 ` Ingo Molnar
2013-10-08  9:34                   ` Ingo Molnar
2013-10-08  9:34                   ` Ingo Molnar
2013-10-07 22:14           ` Linus Torvalds

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