Currently enabling /sys/kernel/debug/pstore/record_ftrace traces all functions
and setting set_ftrace_filter doesn't apply. These patches allow one to
set_ftrace_filter and have pstore make use of the filtering feature resulting in
lower overhead and performance improvement.
Changes in v2 are only to check if ftrace ops were already initialized and not
set the global filter if it was.
Joel Fernandes (2):
ftrace: Provide API to use global filtering for ftrace ops
pstore: Use global ftrace filters for function trace filtering
fs/pstore/ftrace.c | 7 +++++--
include/linux/ftrace.h | 2 ++
kernel/trace/ftrace.c | 17 +++++++++++++++++
3 files changed, 24 insertions(+), 2 deletions(-)
Cc: Anton Vorontsov <[email protected]>
Cc: Colin Cross <[email protected]>
Cc: Kees Cook <[email protected]>
Cc: Tony Luck <[email protected]>
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2.8.0.rc3.226.g39d4020