Re: [tip:perf/core] perf/x86/intel: Disable userspace RDPMC usage for large PEBS

"Liang, Kan" <kan.liang@xxxxxxxxxxxxxxx> · Fri, 9 Mar 2018 13:53:55 -0500

On 3/9/2018 12:42 PM, Peter Zijlstra wrote:

On Fri, Mar 09, 2018 at 09:31:11AM -0500, Vince Weaver wrote:

On Fri, 9 Mar 2018, tip-bot for Kan Liang wrote:

Commit-ID:  1af22eba248efe2de25658041a80a3d40fb3e92e
Gitweb:     https://git.kernel.org/tip/1af22eba248efe2de25658041a80a3d40fb3e92e
Author:     Kan Liang <kan.liang@xxxxxxxxxxxxxxx>
AuthorDate: Mon, 12 Feb 2018 14:20:35 -0800
Committer:  Ingo Molnar <mingo@xxxxxxxxxx>
CommitDate: Fri, 9 Mar 2018 08:22:23 +0100

perf/x86/intel: Disable userspace RDPMC usage for large PEBS

So this whole commit log is about disabling RDPMC usage for "large PEBS"
but the actual change disables RDPMC if "PERF_X86_EVENT_FREERUNNING"

Either the commit log is really misleading, or else a poor name was chosen
for this feature.

Its the same thing, and yes that might want renaming I suppose.

Yes, I will send a patch to rename the "FREERUNNING" to "LARGE_PEBS", 

and fix the confusion.

Thanks,
Kan

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