Messages in this thread | | | Date | Fri, 01 Jun 2012 10:57:02 -0400 | From | Steven Rostedt <> | Subject | [PATCH 0/5 v2] [RFC] ftrace: Fix bug with function tracing and lockdep |
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This is an updated version with input from H. Peter Anvin and Peter Zijlstra. It may still not be up to par to actually pull. I would like to hear more comments from people.
Yes, the NMI/INT3/Lockdep is complex. But I believe this is the nature of the beast. If someone can come up with a simpler solution, I'm all ears. Right now, the upstream tree has a bug when enabling function tracer when lockdep is enabled that may crash the system.
Thoughts on this?
-- Steve
These are in the latest tip/perf/urgent-2 tree, which can be found at:
git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace.git tip/perf/urgent-2
Head SHA1: 5963e317b1e9d2a4511503916d8fd664bb8fa8fb
Steven Rostedt (5): ftrace: Synchronize variable setting with breakpoints ftrace: Use breakpoint method to update ftrace caller x86: Reset the debug_stack update counter x86: Allow nesting of the debug stack IDT setting ftrace/x86: Do not change stacks in DEBUG when calling lockdep
---- arch/x86/include/asm/ftrace.h | 2 +- arch/x86/kernel/cpu/common.c | 8 +++- arch/x86/kernel/entry_64.S | 44 ++++++++++++++++-- arch/x86/kernel/ftrace.c | 102 ++++++++++++++++++++++++++++++++++++++--- arch/x86/kernel/nmi.c | 6 ++- arch/x86/kernel/traps.c | 8 +++- 6 files changed, 154 insertions(+), 16 deletions(-) [unhandled content-type:application/pgp-signature]
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