Re: [PATCH V6 02/16] perf/x86/intel: Support PERF_SAMPLE_DATA_PAGE_SIZE

Peter Zijlstra
2020-08-10T21:40:51Z

On Mon, Aug 10, 2020 at 02:24:22PM -0700, Kan Liang wrote:
> The new sample type, PERF_SAMPLE_DATA_PAGE_SIZE, requires the virtual
> address. Update the data->addr if the sample type is set.
>
> The large PEBS is disabled with the sample type, because perf doesn't
> support munmap tracking yet. The PEBS buffer for large PEBS cannot be
> flushed for each munmap. Wrong page size may be calculated. The large
> PEBS can be enabled later separately when munmap tracking is supported.

You also get to fix up Power.

arch/powerpc/perf/core-book3s.c: (PERF_SAMPLE_ADDR | PERF_SAMPLE_PHYS_ADDR))