Re: [PATCH v2] PCI/MSI: Avoid torn updates to MSI pairs

[Evan Green]

On Wed, Jan 29, 2020 at 3:16 PM Thomas Gleixner <tglx@xxxxxxxxxxxxx> wrote:
>
> Evan,
>
> Evan Green <evgreen@xxxxxxxxxxxx> writes:
> > On Wed, Jan 29, 2020 at 1:01 PM Thomas Gleixner <tglx@xxxxxxxxxxxxx> wrote:
> >
> >> Could you please add some instrumentation to see how often this stuff
> >> actually triggers spurious interrupts?
> >
> > In about 10 minutes of this script running, I got 142 hits. My script
> > can toggle the HT cpus on and off about twice per second.
> > Here's my diff (sorry it's mangled by gmail). If you're looking for
> > something else, let me know, or I can run a patch.
> >
> No, that's good data. Your testing is hiting the critical path and as
> you did not complain about negative side effects it seems to hold up to
> the expectations. I'm going to convert this to real patch with a
> proper changelog tomorrow.
>
> Thanks for your help!

Sounds good, please CC me on it and I'll be sure to test the final
result as well.
-Evan