Messages in this thread Patch in this message | | | From | Yang Shi <> | Subject | [PATCH v4 3/7] x86: mm/gup: add gup trace points | Date | Wed, 9 Dec 2015 09:29:20 -0800 |
| |
Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: x86@kernel.org Signed-off-by: Yang Shi <yang.shi@linaro.org> --- arch/x86/mm/gup.c | 7 +++++++ 1 file changed, 7 insertions(+)
diff --git a/arch/x86/mm/gup.c b/arch/x86/mm/gup.c index ae9a37b..a96bcb7 100644 --- a/arch/x86/mm/gup.c +++ b/arch/x86/mm/gup.c @@ -12,6 +12,9 @@ #include <asm/pgtable.h> +#define CREATE_TRACE_POINTS +#include <trace/events/gup.h>> + static inline pte_t gup_get_pte(pte_t *ptep) { #ifndef CONFIG_X86_PAE @@ -270,6 +273,8 @@ int __get_user_pages_fast(unsigned long start, int nr_pages, int write, (void __user *)start, len))) return 0; + trace_gup_get_user_pages_fast(start, nr_pages); + /* * XXX: batch / limit 'nr', to avoid large irq off latency * needs some instrumenting to determine the common sizes used by @@ -373,6 +378,8 @@ int get_user_pages_fast(unsigned long start, int nr_pages, int write, } while (pgdp++, addr = next, addr != end); local_irq_enable(); + trace_gup_get_user_pages_fast(start, nr_pages); + VM_BUG_ON(nr != (end - start) >> PAGE_SHIFT); return nr; -- 2.0.2
| |