linux-kernel - Re: 2.6.25-rc2-mm1

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Date:	Mon, 18 Feb 2008 16:15:58 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Kevin Winchester <kjwinchester@...il.com>
Cc:	linux-kernel@...r.kernel.org, Steven Rostedt <rostedt@...dmis.org>,
	Ingo Molnar <mingo@...e.hu>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Subject: Re: 2.6.25-rc2-mm1

On Mon, 18 Feb 2008 20:08:03 -0400 Kevin Winchester <kjwinchester@...il.com> wrote:

> Andrew Morton wrote:
> > ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.25-rc2/2.6.25-rc2-mm1/
> > 
> > - git-xfs is dropped due to git conflicts
> > 
> > - git-x86 is dropped due to too many changes to non-x86 code
> > 
> > - git-perfmon remains dropped due to rejects
> > 
> > - git-kgdb remains dropped due to rejects
> > 
> > - Added the slab/slub tree as git-slub.patch (Christoph Lameter)
> > 
> > 
> 
> I don't think I've seen anyone else report this, but if I'm wrong, I'm
> sure someone will point me to the thread.

No, I think it's new.

>  This is during boot up, and
> doesn't seem to have any effect on the running system, that I can tell.
> 
> [    0.090840] ------------[ cut here ]------------
> [    0.090920] WARNING: at kernel/lockdep.c:2677 check_flags+0x8d/0x12d()
> [    0.090986] Pid: 1, comm: swapper Not tainted 2.6.25-rc2-mm1 #49
> [    0.090986]  [<c011b92d>] warn_on_slowpath+0x41/0x72
> [    0.090986]  [<c0136ff1>] ? __lock_acquire+0xb99/0xbb5
> [    0.090986]  [<c0140632>] ? ftrace_record_ip+0x11e/0x17a
> [    0.090986]  [<c0102bd0>] ? mcount_call+0x5/0x9
> [    0.090986]  [<c01344f0>] ? check_chain_key+0xe/0x16a
> [    0.090986]  [<c0140632>] ? ftrace_record_ip+0x11e/0x17a
> [    0.090986]  [<c01dd1a8>] ? debug_locks_off+0x8/0x3c
> [    0.090986]  [<c0102bd0>] ? mcount_call+0x5/0x9
> [    0.090986]  [<c01182c4>] ? sub_preempt_count+0xa/0xb0
> [    0.090986]  [<c03453bd>] ? _spin_unlock_irqrestore+0x47/0x5d
> [    0.090986]  [<c0140632>] ? ftrace_record_ip+0x11e/0x17a
> [    0.090986]  [<c0102bd0>] ? mcount_call+0x5/0x9
> [    0.090986]  [<c0134442>] check_flags+0x8d/0x12d
> [    0.090986]  [<c0137043>] lock_acquire+0x36/0x82
> [    0.090986]  [<c03440c2>] down_write+0x2d/0x48
> [    0.090986]  [<c015e91a>] ? kmem_cache_create+0x21/0x1a7
> [    0.090986]  [<c015e91a>] kmem_cache_create+0x21/0x1a7
> [    0.090986]  [<c0449642>] filelock_init+0x23/0x2c
> [    0.090986]  [<c016d908>] ? init_once+0x0/0x11
> [    0.090986]  [<c043d697>] kernel_init+0xb6/0x203
> [    0.090986]  [<c0102dae>] ? restore_nocheck_notrace+0x0/0xe
> [    0.090986]  [<c043d5e1>] ? kernel_init+0x0/0x203
> [    0.090986]  [<c043d5e1>] ? kernel_init+0x0/0x203
> [    0.090986]  [<c01038d3>] kernel_thread_helper+0x7/0x10
> [    0.090986]  =======================
> [    0.090986] ---[ end trace 4eaa2a86a8e2da22 ]---
> [    0.090986] possible reason: unannotated irqs-on.
> [    0.090986] irq event stamp: 1404
> [    0.090986] hardirqs last  enabled at (1403): [<c01360a0>]
> trace_hardirqs_on+0xb/0xd
> [    0.090986] hardirqs last disabled at (1404): [<c0134c15>]
> trace_hardirqs_off+0xb/0xd
> [    0.090986] softirqs last  enabled at (1010): [<c011fc87>]
> __do_softirq+0x9e/0xa3
> [    0.090986] softirqs last disabled at (1003): [<c010508d>]
> do_softirq+0x5d/0xad

Looks like an ftrace-vs-lockdep problem.
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