Re: [PATCH v3 0/5] perf: arm_spe: Add format option for discard mode

[James Clark]

On 10/01/2025 4:22 pm, Will Deacon wrote:
> On Wed, 08 Jan 2025 14:28:55 +0000, James Clark wrote:
> > Discard mode (Armv8.6) is a way to enable SPE related PMU events without
> > the overhead of recording any data. Add a format option, tests and docs
> > for it.
> >
> > In theory we could make the driver drop calls to allocate the aux buffer
> > when discard mode is enabled. This would give a small memory saving,
> > but I think there is potential to interfere with any tools that don't
> > expect this so I left the aux allocation untouched. Even old tools that
> > don't know about discard mode will be able to use it because we publish
> > the format option. Not allocating the aux buffer will have to be added
> > to tools which I've done in Perf.
> >
> > [...]
>
> Applied driver and docs patches to will (for-next/perf), thanks!
>
> [1/5] perf: arm_spe: Add format option for discard mode
>        https://git.kernel.org/will/c/d28d95bc63cb
> [2/5] perf docs: arm_spe: Document new discard mode
>        https://git.kernel.org/will/c/ba113ecad81a
>
> Cheers,

Thanks Will. Arnaldo and Namhyung, are you ok to take the Perf changes now?

Thanks
James