On Wed, Apr 03, 2024 at 04:38:00PM +0800, Kefeng Wang wrote:
> The vm_flags of vma already checked under per-VMA lock, if it is a
> bad access, directly set fault to VM_FAULT_BADACCESS and handle error,
> no need to retry with mmap_lock again, the latency time reduces 34% in
> 'lat_sig -P 1 prot
The vm_flags of vma already checked under per-VMA lock, if it is a
bad access, directly set fault to VM_FAULT_BADACCESS and handle error,
no need to retry with mmap_lock again, the latency time reduces 34% in
'lat_sig -P 1 prot lat_sig' from lmbench testcase.
Since the page faut is handled under
