linux-kernel - Re: [Announce] 2.6.29-rc4-rt1

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Date:	Thu, 12 Feb 2009 09:18:01 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Frederic Weisbecker <fweisbec@...il.com>
Cc:	Thomas Gleixner <tglx@...x.de>,
	LKML <linux-kernel@...r.kernel.org>,
	rt-users <linux-rt-users@...r.kernel.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Carsten Emde <ce@...g.ch>, Clark Williams <williams@...hat.com>
Subject: Re: [Announce] 2.6.29-rc4-rt1


* Frederic Weisbecker <fweisbec@...il.com> wrote:

> The first one, a lockdep warning:
> 
> [    2.975320]  [<ffffffff8077c7f5>] rt_spin_lock+0x85/0xb0
> [    2.975320]  [<ffffffff802f6823>] ? kfree+0x43/0xc0
> [    2.975320]  [<ffffffff802f6823>] kfree+0x43/0xc0
> [    2.975320]  [<ffffffff8027f2fd>] ? trace_hardirqs_off+0xd/0x10
> [    2.975320]  [<ffffffff8028a156>] generic_smp_call_function_single_interrupt+0x106/0x110
> [    2.975320]  [<ffffffff80227144>] smp_call_function_single_interrupt+0x24/0x40
> [    2.975320]  [<ffffffff80213223>] call_function_single_interrupt+0x13/0x20
> [    2.975320]  <EOI>  [<ffffffff8022df7b>] ? native_safe_halt+0xb/0x10
> [    2.975320]  [<ffffffff8022df79>] ? native_safe_halt+0x9/0x10
> [    2.975320]  [<ffffffff8021a93a>] ? default_idle+0x5a/0x60
> [    2.975320]  [<ffffffff8021136e>] ? cpu_idle+0x7e/0x100
> [    2.975320]  [<ffffffff80775b6c>] ? start_secondary+0x197/0x1eb

hm, that's a complex one - we do kfree() from IPI context, dunno why this
never triggered in our testing of -rt1.

> The second, a sysfs warning:
> 
> [    8.042459] ------------[ cut here ]------------
> [    8.054763] WARNING: at fs/sysfs/dir.c:462 sysfs_add_one+0x51/0x60()
> [    8.066777] Hardware name: AMILO Li 2727                  
> [    8.078555] sysfs: duplicate filename '14:4' can not be created

that should be harmless - unless you only get it under -rt1.

	Ingo
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