Re: [PATCH v4 0/3] Optimize tlbflush path

Atish Patra
2019-10-31T15:13:20Z

On Thu, 2019-10-24 at 20:09 -0700, Paul Walmsley wrote:
> On Fri, 30 Aug 2019, Paul Walmsley wrote:
>
> > On Thu, 22 Aug 2019, Atish Patra wrote:
> >
> > > This series adds few optimizations to reduce the trap cost in the
> > > tlb
> > > flush path. We should only make SBI calls to remote tlb flush
> > > only if
> > > absolutely required.
> >
> > The patches look great. My understanding is that these
> > optimization
> > patches may actually be a partial workaround for the TLB flushing
> > bug that
> > we've been looking at for the last month or so, which can corrupt
> > memory
> > or crash the system.
>
> I don't think we're any closer to root-causing this
> issue. Meanwhile,
> OpenSBI has merged patches to work around it. So since many of us
> have
> looked at Atish's TLB optimization patches, and we all think they
> are
> useful optimizations, let's plan to merge it for v5.5-rc1.
>
>

Thanks. These patches still applies cleanly on 5.4-rc5.
Let me know if you need something from myside.

> - Paul

--
Regards,
Atish