page-faults events record the invoke to handle_mm_fault, but the invoke may come from do_page_fault or gup. In some use cases, the finer event count mey be needed, so add trace events support for:
__get_user_pages __get_user_pages_fast fixup_user_fault
Signed-off-by: Yang Shi yang.shi@linaro.org --- include/trace/events/gup.h | 63 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 63 insertions(+) create mode 100644 include/trace/events/gup.h
diff --git a/include/trace/events/gup.h b/include/trace/events/gup.h new file mode 100644 index 0000000..7575930 --- /dev/null +++ b/include/trace/events/gup.h @@ -0,0 +1,63 @@ +#undef TRACE_SYSTEM +#define TRACE_SYSTEM gup + +#if !defined(_TRACE_GUP_H) || defined(TRACE_HEADER_MULTI_READ) +#define _TRACE_GUP_H + +#include <linux/types.h> +#include <linux/tracepoint.h> + +TRACE_EVENT(gup_fixup_user_fault, + + TP_PROTO(unsigned long address), + + TP_ARGS(address), + + TP_STRUCT__entry( + __field( unsigned long, address ) + ), + + TP_fast_assign( + __entry->address = address; + ), + + TP_printk("address=%lx", __entry->address) +); + +DECLARE_EVENT_CLASS(gup, + + TP_PROTO(unsigned long start, unsigned long nr_pages), + + TP_ARGS(start, nr_pages), + + TP_STRUCT__entry( + __field( unsigned long, start ) + __field( unsigned long, nr_pages ) + ), + + TP_fast_assign( + __entry->start = start; + __entry->nr_pages = nr_pages; + ), + + TP_printk("start=%lx nr_pages=%lu", __entry->start, __entry->nr_pages) +); + +DEFINE_EVENT(gup, gup_get_user_pages, + + TP_PROTO(unsigned long start, unsigned long nr_pages), + + TP_ARGS(start, nr_pages) +); + +DEFINE_EVENT(gup, gup_get_user_pages_fast, + + TP_PROTO(unsigned long start, unsigned long nr_pages), + + TP_ARGS(start, nr_pages) +); + +#endif /* _TRACE_GUP_H */ + +/* This part must be outside protection */ +#include <trace/define_trace.h>