Messages in this thread | | | Date | Tue, 30 Jul 2013 07:27:18 -0400 | From | Steven Rostedt <> | Subject | [for-next-3.11][PATCH 0/8] ftrace/tracing: Event file fixes and ftrace function hash fixes |
| |
Oleg has been continuing his work on fixing a race between opening an event file and deleting that same event. Using the i_private and event_mutex to verify that the event still exists to solve the race.
A long standing bug on the ftrace hash accounting has finally been figured out. When tracing a module that is removed and then reloaded, the function filter hash gets out of sync with the function record's ref count which causes a nasty warning and disabling of the function tracer.
git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace.git for-next
Head SHA1: 6fd52fce057b55cc1bba463e6f05536a76c058b4
Oleg Nesterov (6): tracing: Turn event/id->i_private into call->event.type tracing: Change event_enable/disable_read() to verify i_private != NULL tracing: Change event_filter_read/write to verify i_private != NULL tracing: Change f_start() to take event_mutex and verify i_private != NULL tracing: Introduce remove_event_file_dir() tracing: Change remove_event_file_dir() to clear "d_subdirs"->i_private
Steven Rostedt (Red Hat) (2): ftrace: Consolidate some duplicate code for updating ftrace ops ftrace: Clear module traced functions on unload module
---- kernel/trace/ftrace.c | 76 +++++++++++++++-- kernel/trace/trace_events.c | 159 ++++++++++++++++++++---------------- kernel/trace/trace_events_filter.c | 17 ++-- 3 files changed, 164 insertions(+), 88 deletions(-)
| |