On Mon, Apr 17, 2023 at 2:26 PM Peter Xu <peterx@xxxxxxxxxx> wrote: > > On Fri, Apr 14, 2023 at 05:08:18PM -0700, Suren Baghdasaryan wrote: > > @@ -5223,8 +5230,8 @@ vm_fault_t handle_mm_fault(struct vm_area_struct *vma, unsigned long address, > > if (task_in_memcg_oom(current) && !(ret & VM_FAULT_OOM)) > > mem_cgroup_oom_synchronize(false); > > } > > - > > - mm_account_fault(regs, address, flags, ret); > > +out: > > + mm_account_fault(mm, regs, address, flags, ret); > > Ah, one more question.. can this cached mm race with a destroying mm (just > like the vma race we wanted to avoid)? Still a question only applies to > COMPLETE case when mmap read lock can be released. Thanks, I believe that is impossible because whoever is calling the page fault handler has stabilized the mm by getting a refcount. > > > > > return ret; > > } > > -- > Peter Xu >
