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| author | Xie XiuQi <xiexiuqi@huawei.com> | 2015-06-24 16:57:36 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-06-24 17:49:43 -0700 |
| commit | 97f0b13452198290799fd6780f05fbaa74f927d3 (patch) | |
| tree | 06401ca906140b76ed4206968a412eb860bd65c0 /mm/memory-failure.c | |
| parent | cc3e2af42e7b7e0457b93bf17c19b44c635cd40c (diff) | |
| download | lwn-97f0b13452198290799fd6780f05fbaa74f927d3.tar.gz lwn-97f0b13452198290799fd6780f05fbaa74f927d3.zip | |
tracing: add trace event for memory-failure
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
[xiexiuqi@huawei.com: fix build error]
Signed-off-by: Xie XiuQi <xiexiuqi@huawei.com>
Reviewed-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Chen Gong <gong.chen@linux.intel.com>
Cc: Jim Davis <jim.epost@gmail.com>
Signed-off-by: Xie XiuQi <xiexiuqi@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/memory-failure.c')
| -rw-r--r-- | mm/memory-failure.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/mm/memory-failure.c b/mm/memory-failure.c index 15c0d5ab0893..c53543d89282 100644 --- a/mm/memory-failure.c +++ b/mm/memory-failure.c @@ -57,6 +57,7 @@ #include <linux/mm_inline.h> #include <linux/kfifo.h> #include "internal.h" +#include "ras/ras_event.h" int sysctl_memory_failure_early_kill __read_mostly = 0; @@ -855,6 +856,8 @@ static struct page_state { static void action_result(unsigned long pfn, enum mf_action_page_type type, enum mf_result result) { + trace_memory_failure_event(pfn, type, result); + pr_err("MCE %#lx: recovery action for %s: %s\n", pfn, action_page_types[type], action_name[result]); } |