ftrace/tracing: Event file fixes and ftrace function hash fixes
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- v1 Latest8 patches 6 repliesIn review
Patches in v1 No applies recorded yet
| # | Subject and files | Size | Replies | Applied |
|---|---|---|---|---|
| 1/8 | tracing: Turn event/id->i_private into call->event.typekernel/ | +13 | 0 replies | |
| 2/8 | tracing: Change event_enable/disable_read() to verify i_private != NULLkernel/ | +20 | 0 replies | |
| 3/8 | tracing: Change event_filter_read/write to verify i_private != NULLkernel/ kernel/ | +25 | 0 replies | |
| 4/8 | tracing: Change f_start() to take event_mutex and verify i_private != NULLkernel/ | +9 | 0 replies | |
| 5/8 | tracing: Introduce remove_event_file_dir()kernel/ | +23 | 0 replies | |
| 6/8 | tracing: Change remove_event_file_dir() to clear "d_subdirs"->i_privatekernel/ | +15 | 0 replies | |
| 7/8 | ftrace: Consolidate some duplicate code for updating ftrace opskernel/ | +10 | 0 replies | |
| 8/8 | ftrace: Clear module traced functions on unload modulekernel/ | +60 | 1 reply |
Reviews trailers per patch
6 of 8 patches have a Reviewed-by or Acked-by.
| Patch | Masami Hiramatsu | Steve Hodgson |
|---|---|---|
| 1/8 | R-b | |
| 2/8 | R-b | |
| 3/8 | R-b | |
| 4/8 | R-b | |
| 5/8 | R-b | |
| 6/8 | R-b | |
| 7/8 | ||
| 8/8 | T-b |
Trailers given in replies are filled; those carried in the patches from earlier versions are outlined with dashes.
Cover letter [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
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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_privateSteven 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(-)