Use the general page fault accounting by passing regs into handle_mm_fault(). It naturally solve the issue of multiple page fault accounting when page fault retry happened.
Add the missing PERF_COUNT_SW_PAGE_FAULTS perf events too. Note, the other two perf events (PERF_COUNT_SW_PAGE_FAULTS_[MAJ|MIN]) were done in handle_mm_fault(). CC: Brian Cain <[email protected]> CC: [email protected] Signed-off-by: Peter Xu <[email protected]> --- arch/hexagon/mm/vm_fault.c | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-) diff --git a/arch/hexagon/mm/vm_fault.c b/arch/hexagon/mm/vm_fault.c index f04cd0a6d905..1b1802f30862 100644 --- a/arch/hexagon/mm/vm_fault.c +++ b/arch/hexagon/mm/vm_fault.c @@ -19,6 +19,7 @@ #include <linux/signal.h> #include <linux/extable.h> #include <linux/hardirq.h> +#include <linux/perf_event.h> /* * Decode of hardware exception sends us to one of several @@ -54,6 +55,8 @@ void do_page_fault(unsigned long address, long cause, struct pt_regs *regs) if (user_mode(regs)) flags |= FAULT_FLAG_USER; + + perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS, 1, regs, address); retry: down_read(&mm->mmap_sem); vma = find_vma(mm, address); @@ -89,7 +92,7 @@ void do_page_fault(unsigned long address, long cause, struct pt_regs *regs) break; } - fault = handle_mm_fault(vma, address, flags, NULL); + fault = handle_mm_fault(vma, address, flags, regs); if (fault_signal_pending(fault, regs)) return; @@ -97,10 +100,6 @@ void do_page_fault(unsigned long address, long cause, struct pt_regs *regs) /* The most common case -- we are done. */ if (likely(!(fault & VM_FAULT_ERROR))) { if (flags & FAULT_FLAG_ALLOW_RETRY) { - if (fault & VM_FAULT_MAJOR) - current->maj_flt++; - else - current->min_flt++; if (fault & VM_FAULT_RETRY) { flags |= FAULT_FLAG_TRIED; goto retry; -- 2.26.2
