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SubjectRe: [PATCH 0/6] ftrace: port to the new ring_buffer

On Tue, 30 Sep 2008, Ingo Molnar wrote:

>
> > -tip testing found that tip/tracing/ring-buffer causes a new lockdep
> > splat:
>
> FYI, triggered on a number of 32-bit test-systems as well - see the log
> below.
>
> Ingo
>
> [ 0.564008] calling tracer_alloc_buffers+0x0/0x16b @ 1
> [ 0.574504] ------------[ cut here ]------------
> [ 0.576002] WARNING: at kernel/lockdep.c:2880 check_flags+0x5a/0x155()
> [ 0.576002] Modules linked in:
> [ 0.576002] Pid: 1, comm: swapper Not tainted 2.6.27-rc8-tip-00915-g8cb18a9-dirty #37502
> [ 0.576002] [<c01536c4>] warn_on_slowpath+0x46/0x6a
> [ 0.576002] [<c0170b14>] ? trace_hardirqs_off+0xb/0xd
> [ 0.576002] [<c0173294>] ? __lock_acquire+0xa91/0xaad
> [ 0.576002] [<c01a6470>] ? get_page_from_freelist+0x37b/0x455
> [ 0.576002] [<c0170044>] ? __raw_spin_is_locked+0x15/0x18
> [ 0.576002] [<c0171cf8>] ? find_usage_backwards+0x21/0xe1
> [ 0.576002] [<c019f852>] ? time_hardirqs_off+0xe/0x1f
> [ 0.576002] [<c0170a66>] ? trace_hardirqs_off_caller+0x15/0xb8
> [ 0.576002] [<c0170b14>] ? trace_hardirqs_off+0xb/0xd

Again, I think this is the same issue with the raws?

-- Steve



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