Add trace events for cma_alloc() and cma_release(). Signed-off-by: Stefan Strogin <stefan.stro...@gmail.com> --- include/trace/events/cma.h | 57 ++++++++++++++++++++++++++++++++++++++++++++++ mm/cma.c | 5 ++++ 2 files changed, 62 insertions(+) create mode 100644 include/trace/events/cma.h
diff --git a/include/trace/events/cma.h b/include/trace/events/cma.h new file mode 100644 index 0000000..d88881b --- /dev/null +++ b/include/trace/events/cma.h @@ -0,0 +1,57 @@ +#undef TRACE_SYSTEM +#define TRACE_SYSTEM cma + +#if !defined(_TRACE_CMA_H) || defined(TRACE_HEADER_MULTI_READ) +#define _TRACE_CMA_H + +#include <linux/types.h> +#include <linux/tracepoint.h> + +TRACE_EVENT(cma_alloc, + + TP_PROTO(struct cma *cma, struct page *page, int count), + + TP_ARGS(cma, page, count), + + TP_STRUCT__entry( + __field(struct page *, page) + __field(unsigned long, count) + ), + + TP_fast_assign( + __entry->page = page; + __entry->count = count; + ), + + TP_printk("page=%p pfn=%lu count=%lu", + __entry->page, + __entry->page ? page_to_pfn(__entry->page) : 0, + __entry->count) +); + +TRACE_EVENT(cma_release, + + TP_PROTO(struct cma *cma, unsigned long pfn, int count), + + TP_ARGS(cma, pfn, count), + + TP_STRUCT__entry( + __field(unsigned long, pfn) + __field(unsigned long, count) + ), + + TP_fast_assign( + __entry->pfn = pfn; + __entry->count = count; + ), + + TP_printk("pfn=%lu page=%p count=%lu", + __entry->pfn, + pfn_to_page(__entry->pfn), + __entry->count) +); + +#endif /* _TRACE_CMA_H */ + +/* This part must be outside protection */ +#include <trace/define_trace.h> diff --git a/mm/cma.c b/mm/cma.c index 47203fa..63dfc0e 100644 --- a/mm/cma.c +++ b/mm/cma.c @@ -23,6 +23,7 @@ # define DEBUG #endif #endif +#define CREATE_TRACE_POINTS #include <linux/memblock.h> #include <linux/err.h> @@ -34,6 +35,7 @@ #include <linux/cma.h> #include <linux/highmem.h> #include <linux/io.h> +#include <trace/events/cma.h> #include "cma.h" @@ -414,6 +416,8 @@ struct page *cma_alloc(struct cma *cma, unsigned int count, unsigned int align) start = bitmap_no + mask + 1; } + trace_cma_alloc(cma, page, count); + pr_debug("%s(): returned %p\n", __func__, page); return page; } @@ -446,6 +450,7 @@ bool cma_release(struct cma *cma, const struct page *pages, unsigned int count) free_contig_range(pfn, count); cma_clear_bitmap(cma, pfn, count); + trace_cma_release(cma, pfn, count); return true; } -- 2.1.0 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/