Re: [PATCH v7] mm/hwpoison: fix race between hugetlb free/demotion and memory_failure_hugetlb()

[HORIGUCHI NAOYA(堀口 直也)]

> >> Without this patch, page refcnt is not decremented if MF_COUNT_INCREASED is set in flags
> >> when PageHWPoison is already set. So I think this patch also fixes that issue. Thanks!
> > 
> > Good point, I even didn't notice that. And the issue still seems to exist
> > for normal page's cases.  Maybe encountering "already hwpoisoned" case from
> > madvise_inject_error() is rare but could happen when the first call failed
> > to contain the error (which is still accessible from the calling process).
> 
> Oh, I missed normal page's issue. :) Will you fix this issue kindly or am I supposed
> to fix it?

I'll try it too, ;)

Thanks,
Naoya Horiguchi