RAS user space tools like rasdaemon which base on trace event, could
receive mce error event, but no memory recovery result event. So, I
want to add this event to make this scenario complete.
This patch add a event at ras group for memory-failure.
The output like below:
# tracer: nop
#
# entries-in-buffer/entries-written: 2/2 #P:24
#
# _-----=> irqs-off
# / _----=> need-resched
# | / _---=> hardirq/softirq
# || / _--=> preempt-depth
# ||| / delay
# TASK-PID CPU# |||| TIMESTAMP FUNCTION
# | | | |||| | |
mce-inject-13150 [001] .... 277.019359: memory_failure_event: pfn 0x19869: recovery action for free buddy page: Delayed
--
v2->v3:
- rebase on top of linux-next
- based on Steven Rostedt's "tracing: Add TRACE_DEFINE_ENUM() macro
to map enums to their values" patch set v1.
v1->v2:
- Comment update
- Just passing 'result' instead of 'action_name[result]',
suggested by Steve. And hard coded there because trace-cmd
and perf do not have a way to process enums.
Xie XiuQi (2):
memory-failure: export page_type and action result
tracing: add trace event for memory-failure
include/linux/mm.h | 34 ++++++++++
include/ras/ras_event.h | 83 ++++++++++++++++++++++++
kernel/trace/trace.c | 2 +-
mm/memory-failure.c | 165 ++++++++++++++++++++----------------------------
4 files changed, 185 insertions(+), 99 deletions(-)
--
1.8.3.1
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