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
Cc: Yang Shi yang.shi@windriver.com Signed-off-by: Yang Shi yang.shi@linaro.org --- include/trace/events/gup.h | 77 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 77 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..37d18f9 --- /dev/null +++ b/include/trace/events/gup.h @@ -0,0 +1,77 @@ +#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(struct task_struct *tsk, struct mm_struct *mm, + unsigned long address, unsigned int fault_flags), + + TP_ARGS(tsk, mm, address, fault_flags), + + TP_STRUCT__entry( + __array( char, comm, TASK_COMM_LEN ) + __field( unsigned long, address ) + ), + + TP_fast_assign( + memcpy(__entry->comm, tsk->comm, TASK_COMM_LEN); + __entry->address = address; + ), + + TP_printk("comm=%s address=%lx", __entry->comm, __entry->address) +); + +TRACE_EVENT(gup_get_user_pages, + + TP_PROTO(struct task_struct *tsk, struct mm_struct *mm, + unsigned long start, unsigned long nr_pages, + unsigned int gup_flags, struct page **pages, + struct vm_area_struct **vmas, int *nonblocking), + + TP_ARGS(tsk, mm, start, nr_pages, gup_flags, pages, vmas, nonblocking), + + TP_STRUCT__entry( + __array( char, comm, TASK_COMM_LEN ) + __field( unsigned long, start ) + __field( unsigned long, nr_pages ) + ), + + TP_fast_assign( + memcpy(__entry->comm, tsk->comm, TASK_COMM_LEN); + __entry->start = start; + __entry->nr_pages = nr_pages; + ), + + TP_printk("comm=%s start=%lx nr_pages=%lu", __entry->comm, __entry->start, __entry->nr_pages) +); + +TRACE_EVENT(gup_get_user_pages_fast, + + TP_PROTO(unsigned long start, int nr_pages, int write, + struct page **pages), + + TP_ARGS(start, nr_pages, write, 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) +); + +#endif /* _TRACE_GUP_H */ + +/* This part must be outside protection */ +#include <trace/define_trace.h>