[PATCH 0/2] [GIT PULL] tracing: Two more small fixes
From: Steven Rostedt
Date: Thu Apr 20 2017 - 09:59:23 EST
Linus,
While continuing my development, I uncovered two more small bugs.
One is a race condition when enabling the snapshot function probe
trigger. It enables the probe before allocating the snapshot, and
if the probe triggers first, it stops tracing with a warning that
the snapshot buffer was not allocated.
The seconds is that the snapshot file should show how to use it when
it is empty. But a bug fix from long ago broke the "is empty" test
and the snapshot file no longer displays the help message.
Please pull the latest trace-v4.11-rc5-5 tree, which can be found at:
git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace.git
trace-v4.11-rc5-5
Tag SHA1: 561b3641a9deebe33accebee8dfc1a70df7b7ac5
Head SHA1: 78f7a45dac2a2d2002f98a3a95f7979867868d73
Steven Rostedt (VMware) (2):
tracing: Allocate the snapshot buffer before enabling probe
ring-buffer: Have ring_buffer_iter_empty() return true when empty
----
kernel/trace/ring_buffer.c | 16 ++++++++++++++--
kernel/trace/trace.c | 8 +++++---
2 files changed, 19 insertions(+), 5 deletions(-)