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Message-Id: <20141114011244.256115061@goodmis.org>
Date: Thu, 13 Nov 2014 20:12:44 -0500
From: Steven Rostedt <rostedt@...dmis.org>
To: linux-kernel@...r.kernel.org
Cc: Ingo Molnar <mingo@...nel.org>,
Andrew Morton <akpm@...ux-foundation.org>,
Jiri Kosina <jkosina@...e.cz>, Petr Mladek <pmladek@...e.cz>
Subject: [RFC][PATCH 00/23 v4] trace-seq/seq-buf/x86/printk: Print all stacks from NMI safely
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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