On 6/30/20 1:46 PM, Peter Xu wrote:
> Use the general page fault accounting by passing regs into handle_mm_fault().
...
> - /*
> - * Major/minor page fault accounting. If any of the events
> - * returned VM_FAULT_MAJOR, we account it as a major fault.
> - */
> - if (major) {
> - tsk->maj_flt++;
> - perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS_MAJ, 1, regs, address);
> - } else {
> - tsk->min_flt++;
> - perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS_MIN, 1, regs, address);
> - }
> -
> check_v8086_mode(regs, address, tsk);
> }
I did a quick grep and it wasn't obvious to me how
PERF_COUNT_SW_PAGE_FAULTS_MIN/MAJ get bumped in the handle_mm_fault() path.
Are you sure they get set?
