From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751374AbaKOFGF (ORCPT ); Sat, 15 Nov 2014 00:06:05 -0500 Received: from cdptpa-outbound-snat.email.rr.com ([107.14.166.227]:48451 "EHLO cdptpa-oedge-vip.email.rr.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1750707AbaKOFGD (ORCPT ); Sat, 15 Nov 2014 00:06:03 -0500 Message-Id: <20141115045847.712848224@goodmis.org> User-Agent: quilt/0.61-1 Date: Fri, 14 Nov 2014 23:58:47 -0500 From: Steven Rostedt To: linux-kernel@vger.kernel.org Cc: Ingo Molnar , Andrew Morton , Jiri Kosina , Petr Mladek Subject: [PATCH 00/26 v5] trace-seq/seq-buf/x86/printk: Print all stacks from NMI safely X-RR-Connecting-IP: 107.14.168.130:25 X-Cloudmark-Score: 0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Version 5! Full diff between v4 and v5 will be replied to this email. Here's the summary of the differences since version 4: . Various clean ups . Added trace_seq_used() to be used instead of s->seq.len . Used seq_buf_used() instead of s->len . Fixed output of ftrace_raw_output_prep() as well as caller code . Fixed up tracing_fill_pipe_page() The logic was a bit whacky and this was needed when introducing trace_seq_used() . Rebased on latest ftrace/core code . Fixed uprobe to be like probe code in print_uprobe_event() . Introduced new seq_buf_can_fit() to remove the likelyhood of screwing up the s->len + * < s->size code. Now it's just seq_buf_can_fit(s, len) which will tell us if the len can still fit in the buffer. Enjoy, -- Steve Steven Rostedt (Red Hat) (26): 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: Fix return value of ftrace_raw_output_prep() 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 seq_buf: Create seq_buf_used() to find out how much was written tracing: Use trace_seq_used() and seq_buf_used() instead of len seq_buf: Add seq_buf_can_fit() helper function tracing: Have seq_buf use full buffer tracing: Add seq_buf_get_buf() and seq_buf_commit() helper functions 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 | 136 ++++++++++++ include/linux/trace_seq.h | 77 ++++--- include/trace/ftrace.h | 8 +- kernel/printk/printk.c | 38 +++- kernel/trace/blktrace.c | 148 ++++++------- kernel/trace/ring_buffer.c | 75 +++---- kernel/trace/trace.c | 126 ++++++----- kernel/trace/trace.h | 3 +- kernel/trace/trace_branch.c | 15 +- kernel/trace/trace_events.c | 9 +- kernel/trace/trace_functions_graph.c | 393 +++++++++++---------------------- kernel/trace/trace_kprobe.c | 42 ++-- kernel/trace/trace_mmiotrace.c | 52 ++--- kernel/trace/trace_output.c | 417 ++++++++++++++--------------------- kernel/trace/trace_output.h | 16 +- kernel/trace/trace_probe.c | 10 +- kernel/trace/trace_seq.c | 253 +++++++++------------ kernel/trace/trace_syscalls.c | 43 ++-- kernel/trace/trace_uprobe.c | 23 +- lib/Makefile | 2 +- lib/seq_buf.c | 351 +++++++++++++++++++++++++++++ 25 files changed, 1323 insertions(+), 1021 deletions(-)