For slow version, just add trace point for raw __get_user_pages since all slow variants call it to do the real work finally.
Signed-off-by: Yang Shi <yang....@linaro.org> --- mm/gup.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/mm/gup.c b/mm/gup.c index deafa2c..00a3cff 100644 --- a/mm/gup.c +++ b/mm/gup.c @@ -18,6 +18,9 @@ #include "internal.h" +#define CREATE_TRACE_POINTS +#include <trace/events/gup.h> + static struct page *no_page_table(struct vm_area_struct *vma, unsigned int flags) { @@ -462,6 +465,8 @@ long __get_user_pages(struct task_struct *tsk, struct mm_struct *mm, if (!nr_pages) return 0; + trace_gup_get_user_pages(start, nr_pages); + VM_BUG_ON(!!pages != !!(gup_flags & FOLL_GET)); /* @@ -599,6 +604,7 @@ int fixup_user_fault(struct task_struct *tsk, struct mm_struct *mm, if (!(vm_flags & vma->vm_flags)) return -EFAULT; + trace_gup_fixup_user_fault(address); ret = handle_mm_fault(mm, vma, address, fault_flags); if (ret & VM_FAULT_ERROR) { if (ret & VM_FAULT_OOM) @@ -1340,6 +1346,8 @@ int __get_user_pages_fast(unsigned long start, int nr_pages, int write, start, len))) return 0; + trace_gup_get_user_pages_fast(start, nr_pages); + /* * Disable interrupts. We use the nested form as we can already have * interrupts disabled by get_futex_key. -- 2.0.2 -- 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/