On Wed, Nov 11, 2020 at 09:00:46AM -0800, Andi Kleen wrote: > On Mon, Nov 09, 2020 at 10:54:15PM +0100, Jiri Olsa wrote: > > Adding --buildid-mmap option to enable build id in mmap2 events. > > It will only work if there's kernel support for that and it disables > > build id cache (implies --no-buildid). > > What's the point of the option? Why not enable it by default > if the kernel supports it? > > With the option most user won't get the benefit. > > The only reason I can think of for an option would be to disable > so that old tools can still process.
yes, that was request in the rfc post, we want the new default perf.data be still readable by older perf tools jirka
