Re: [PATCH] mm: Don't fault around userfaultfd-registered regions on reads

[David Hildenbrand]

On 26.11.20 23:23, Peter Xu wrote:
> Faulting around for reads are in most cases helpful for the performance so that
> continuous memory accesses may avoid another trip of page fault.  However it
> may not always work as expected.
> 
> For example, userfaultfd registered regions may not be the best candidate for
> pre-faults around the reads.

Are we getting uffd faults even though no-one actually accessed it? So
in case I would track what some part of my program actually reads, I
would get wrong notifications?

-- 
Thanks,

David / dhildenb