Messages in this thread | | | Date | Sat, 2 Oct 2021 18:15:58 +0100 | From | Matthew Wilcox <> | Subject | Re: [PATCH v2] mm/mempolicy: do not allow illegal MPOL_F_NUMA_BALANCING | MPOL_LOCAL in mbind() |
| |
On Fri, Oct 01, 2021 at 04:37:40PM -0700, Eric Dumazet wrote: > > > Issue came with commit bda420b98505 ("numa balancing: migrate on > > > fault among multiple bound nodes") > > > > No cc:stable? What's the worst-case user-visible impact here? > > I added the more precise tag : Fixes: bda420b98505 ("numa balancing: > migrate on fault among multiple bound nodes") > I only put Fixes: tag, so that stable teams can use their automation just fine. > > worst-case impact, I am not sure if any application ever used this > undocumented combinations of flags ? > Also, it is generally advised that accessing garbage values has > undocumented behavior. > A host could for example crash (it certainly does with KMSAN)
mm has special stable rules; fixes only get backported if explicitly requested instead of automatically like most of the rest of the kernel.
| |