netdev - Re: Top kernel oopses/warnings for the week of October 7th, 2008

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Message-ID: <20081007201617.GA20655@elte.hu>
Date:	Tue, 7 Oct 2008 22:16:17 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	Arjan van de Ven <arjan@...ux.intel.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	NetDev <netdev@...r.kernel.org>,
	linux-acpi <linux-acpi@...r.kernel.org>, tglx@...x.de,
	Theodore Ts'o <tytso@....edu>, linux-ide@...r.kernel.org
Subject: Re: Top kernel oopses/warnings for the week of October 7th, 2008

* Rafael J. Wysocki <rjw@...k.pl> wrote:

> > Rank 9: device_pm_add (warning)
> > 	Reported 81 times (323 total reports)
> > 	Drivers with suspect suspend/resume logic; a patch is queued for 2.6.28 to identify
> > 	which drivers are involved.
> > 	This warning was last seen in version 2.6.27-rc4, and first seen in 2.6.26-rc5.
> > 	More info: http://www.kerneloops.org/searchweek.php?search=device_pm_add
> 
> This should have been fixed by:
> http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f5a6d958b5d0a10e7e7a9dee1862fb31d08c6d26

hm, that is:

| From f5a6d958b5d0a10e7e7a9dee1862fb31d08c6d26 Mon Sep 17 00:00:00 2001
| From: Rafael J. Wysocki <rjw@...k.pl>
| Date: Sat, 9 Aug 2008 01:05:13 +0200
| Subject: [PATCH] PM: Remove WARN_ON from device_pm_add
|
| PM: Remove WARN_ON from device_pm_add
|
| Fix message in device_pm_add() saying that the device will not be
| added to dpm_list, although in fact the device is going to be added
| to the list regardless of the ordering violation.
|
| Remove the WARN_ON(true) triggered in that situation, because it is
| hit by USB very often and spams the users' logs.
|
| This patch fixes bug #11263

+               if (dev->parent->power.status >= DPM_SUSPENDING)
+                       dev_warn(dev, "parent %s should not be sleeping\n",
                                dev->parent->bus_id);
-                       WARN_ON(true);
-               }

i.e. no bug was fixed in reality - we still emit a kernel log entry, but 
the WARN_ON() was removed, so that it does not fall under the scope of 
kerneloops.org, right?

	Ingo
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