Messages in this thread | | | Date | Thu, 13 Nov 2014 20:12:44 -0500 | From | Steven Rostedt <> | Subject | [RFC][PATCH 00/23 v4] trace-seq/seq-buf/x86/printk: Print all stacks from NMI safely |
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Version 4:
I updated the code from most of the comments from Petr Mladek. One thing I wanted to do was to remove the return values of the trace_seq_*() functions. The ones that I plan on removing from seq_file equivalents. To do so, I had to restructure the use cases, which ended up cleaning up most of the code. Having updated the trace_seq_*() functions made it possible not to worry about the return values of seq_buf as they were no longer used.
Steven Rostedt (Red Hat) (23): tracing: Fix trace_seq_bitmask() to start at current position tracing: Add trace_seq_has_overflowed() and trace_handle_return() blktrace/tracing: Use trace_seq_has_overflowed() helper function ring-buffer: Remove check of trace_seq_{puts,printf}() return values tracing: Have branch tracer use trace_handle_return() helper function tracing: Have function_graph use trace_seq_has_overflowed() kprobes/tracing: Use trace_seq_has_overflowed() for overflow checks tracing: Do not check return values of trace_seq_p*() for mmio tracer tracing/probes: Do not use return value of trace_seq_printf() tracing/uprobes: Do not use return values of trace_seq_printf() tracing: Do not use return values of trace_seq_printf() in syscall tracing tracing: Remove return values of most trace_seq_*() functions tracing: Create seq_buf layer in trace_seq tracing: Convert seq_buf_path() to be like seq_path() tracing: Convert seq_buf fields to be like seq_file fields tracing: Add a seq_buf_clear() helper and clear len and readpos in init tracing: Have seq_buf use full buffer tracing: Add seq_buf_get_buf() and seq_buf_commit() helper functions seq_buf: Create seq_buf_used() to find out how much was written seq-buf: Make seq_buf_bprintf() conditional on CONFIG_BINARY_PRINTF seq_buf: Move the seq_buf code to lib/ printk: Add per_cpu printk func to allow printk to be diverted x86/nmi: Perform a safe NMI stack trace on all CPUs
---- arch/x86/kernel/apic/hw_nmi.c | 91 +++++++- include/linux/ftrace_event.h | 11 + include/linux/percpu.h | 3 + include/linux/printk.h | 2 + include/linux/seq_buf.h | 135 ++++++++++++ include/linux/trace_seq.h | 59 ++--- include/trace/ftrace.h | 6 +- kernel/printk/printk.c | 38 +++- kernel/trace/blktrace.c | 148 ++++++------- kernel/trace/ring_buffer.c | 75 +++---- kernel/trace/trace.c | 108 ++++----- kernel/trace/trace.h | 3 +- kernel/trace/trace_branch.c | 15 +- kernel/trace/trace_events.c | 6 +- kernel/trace/trace_functions_graph.c | 380 ++++++++++---------------------- kernel/trace/trace_kprobe.c | 42 ++-- kernel/trace/trace_mmiotrace.c | 52 ++--- kernel/trace/trace_output.c | 416 ++++++++++++++--------------------- kernel/trace/trace_output.h | 16 +- kernel/trace/trace_probe.c | 10 +- kernel/trace/trace_seq.c | 254 +++++++++------------ kernel/trace/trace_syscalls.c | 43 ++-- kernel/trace/trace_uprobe.c | 23 +- lib/Makefile | 2 +- lib/seq_buf.c | 346 +++++++++++++++++++++++++++++ 25 files changed, 1275 insertions(+), 1009 deletions(-)
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