Re: 2.6.25-rc2-mm1

From: Andrew Morton
Date: Mon Feb 18 2008 - 19:17:43 EST


On Mon, 18 Feb 2008 20:08:03 -0400 Kevin Winchester <kjwinchester@xxxxxxxxx> 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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