From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Josef Bacik To: Steven Rostedt , "ksummit-discuss@lists.linux-foundation.org" Date: Wed, 20 Sep 2017 14:54:07 +0000 Message-ID: <0C1E6F2D-2E7D-4477-9F35-8C59F62BB409@fb.com> References: <20170920095031.1972fba5@gandalf.local.home> In-Reply-To: <20170920095031.1972fba5@gandalf.local.home> Content-Language: en-US Content-Type: text/plain; charset="utf-8" Content-ID: <81FD70106F119548BC67F2BAF799E9A3@namprd15.prod.outlook.com> Content-Transfer-Encoding: base64 MIME-Version: 1.0 Cc: Peter Zijlstra , Josef Bacik Subject: Re: [Ksummit-discuss] [MAINTAINER TOPIC] tracepoints without user space interfaces List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Q2PigJlpbmcgbXkgcGVyc29uYWwgYWRkcmVzcyBzbyBJIGNhbiByZXBseSB3aXRoIGEgc2FuZSBl bWFpbCBjbGllbnQuDQoNCk9uIDkvMjAvMTcsIDk6NTAgQU0sICJTdGV2ZW4gUm9zdGVkdCIgPHJv c3RlZHRAZ29vZG1pcy5vcmc+IHdyb3RlOg0KDQpUaGUgdG9waWMgY2FtZSB1cCBhZ2FpbiBhdCAo b2YgYWxsIHBsYWNlcykgdGhlIFNjaGVkdWxlIFdvcmtsb2Fkcw0KTWljcm9jb25mIGF0IExpbnV4 IFBsdW1iZXJzIGluIExBIGxhc3Qgd2Vlay4gVGhlIGFkZGl0aW9uIG9mDQp0cmFjZXBvaW50cyBp biBsb2NhdGlvbnMgdGhhdCBtYWludGFpbmVycyBkb24ndCB3YW50IHRoZW0sIG9ubHkgYmVjYXVz ZQ0KdGhleSBkb24ndCB3YW50IHRoZW0gdG8gYmVjb21lIGFuIEFCSSBmb3IgdXNlciBzcGFjZSB0 b29scy4gV2hlcmUNCnRoZXNlIHRvb2xzIHRoZW4gbXVzdCBiZSBzdXBwb3J0ZWQgaW5kZWZpbml0 ZWx5LCBhbmQgbWF5IHByZXZlbnQNCmZ1dHVyZSBkZXZlbG9wbWVudCBvZiB0aGUga2VybmVsLiBU aGlzIGluY2x1ZGVzIHRoZSBzY2hlZHVsZXIgYXMgd2VsbA0KYXMgVkZTIChtYW5kYXRlZCBieSBB bCBWaXJvKS4NCg0KVGhlIGN1cnJlbnQgc29sdXRpb24gYnkgRmFjZWJvb2sgKHRvbGQgdG8gdXMg YnkgSm9zZWYgQmFjaWspIGlzIHRvIGp1c3QNCmhhbmQgd3JpdGUga3Byb2JlcyB3aXRoIEJQRiBw cm9ncmFtcyB0byB0aGUgbG9jYXRpb25zIHRoYXQgdGhleSBuZWVkLg0KV2hlbiB0aGV5IGdldCBh IG5ldyBrZXJuZWwsIHRoZXkganVzdCByZXdyaXRlIHRoZSBwcm9ncmFtcyBiZWNhdXNlIHRoZQ0K a3Byb2JlcyBhbmQgQlBGIHByb2dyYW1zIGJyZWFrIGF0IGVhY2ggbmV3IHJlbGVhc2UgKG9yIGNh biBicmVhaykuDQoNCkZpcnN0IGl0IHdhcyBtZW50aW9uZWQgdG8gYWRkIGEgaG9vayB0byBsb2Nh dGlvbnMgd2hlcmUgaXQgd291bGQgYmUNCmVhc2llciB0byBnZXQgdmFyaWFibGVzLCBhcyB0aGUg Y29tcGlsZXIgY291bGQgb3B0aW1pemUgdGhlbSBvdXQsIGFuZA0KaXQgYmVjb21lcyBkaWZmaWN1 bHQgZXZlbiB3aXRoIEJQRiBhbmQga3Byb2JlcyB0byBnZXQgdGhlIGluZm9ybWF0aW9uDQpvbmUg d291bGQgbGlrZSB0byBoYXZlLiBJdCB3YXMgYXNrZWQgaWYgd2UgY291bGQgYWRkIGEgdHJhY2Vw b2ludCBob29rDQppbiB0aGVzZSBsb2NhdGlvbnMgdGhhdCBhcmUgbm90IGV4cG9ydGVkIHRvIHVz ZXIgc3BhY2Ugd2hlcmUgaXQgcnVucw0KdGhlIHJpc2sgb2YgYmVjb21pbmcgYW4gQUJJLiBJdCB3 YXMgcG9pbnRlZCBvdXQgdGhhdCB0aGlzIG1lY2hhbmlzbQ0KYWxyZWFkeSBleGlzdHMgaW4gdGhl IGtlcm5lbC4NCg0KQSB0cmFjZXBvaW50IGlzIHRoZSBob29rIGluIHRoZSBrZXJuZWwuIFRoZSBU UkFDRV9FVkVOVCgpIG1hY3JvIGlzDQpidWlsdCBvbiB0b3Agb2YgYSB0cmFjZXBvaW50IHRvIGV4 cG9ydCBpdCB0byB1c2VyIHNwYWNlLiBCdXQgdGhlDQp0cmFjZXBvaW50IGl0c2VsZiBjYW4gYmUg bWFudWFsbHkgYWRkZWQgYW55d2hlcmUgYW5kIHRoZXJlIHdpbGwgYmUgbm8NCmNyZWF0aW9uIG9m IHRyYWNlIGV2ZW50IGZpbGVzIGluIHRoZSB0cmFjZWZzIGRpcmVjdG9yeSwgbm9yIHdvdWxkIHBl cmYNCmJlIGFibGUgdG8gYWNjZXNzIGl0LiBCdXQgdGhlIGFkdmFudGFnZSBvZiBoYXZpbmcgdGhp cyBob29rIGlzIHRoYXQgYQ0Ka2VybmVsIG1vZHVsZSBjb3VsZCBhY2Nlc3MgaXQgd2l0aG91dCBh IHByb2JsZW0uDQoNCkJ5IGFkZGluZyB0cmFjZXBvaW50cyBpbiB0aGUgc2NoZWR1bGVyIGFuZCBW RlMsIHdpdGhvdXQgdGhlIFRSQUNFX0VWRU5UDQptYWNyb3MgdGhhdCBleHBvcnQgdGhlbSB0byB1 c2VyIHNwYWNlLCBpdCB3b3VsZCBiZSBtdWNoIGVhc2llciBmb3INCmNvbXBhbmllcyBsaWtlIEZh Y2Vib29rLCBSZWQgSGF0IGFuZCBTdVNFIHRvIGFkZCBhIG1vZHVsZSB0aGF0IGNhbiB0YXANCmlu dG8gdGhlc2UgaG9va3MgYW5kIGJ1aWxkIHRoZWlyIGN1c3RvbSBhbmFseXNpcyB0b29scyBvbiB0 b3AuDQoNClJlcXVpcmluZyBhbiBleHRlcm5hbCBhbmQgY3VzdG9tIG1vZHVsZSB0byBhY2Nlc3Mg dGhlIHRyYWNlcG9pbnRzIG9uDQpsaXZlIHN5c3RlbXMgKHRoYXQgaXMsIGFuIHVubW9kaWZpZWQg dmFuaWxsYSBrZXJuZWwgb3IgZGlzdHJvIGtlcm5lbCkNCndpbGwgaGVscCB0aGVzZSBjb21wYW5p ZXMgaW1wbGVtZW50IGFkdmFuY2UgYW5hbHl0aWNhbCB0b29scyB0byBtb25pdG9yDQp0aGVpciBw cm9kdWN0aW9uIGtlcm5lbHMsIGFuZCBiZWNhdXNlIGl0IHJlcXVpcmVzIGEgbW9kdWxlLCBhbmQg aXQgaGFzDQpiZWVuIHN0YXRlZCBzZXZlcmFsIHRpbWVzIGluIHRoZSBwYXN0IHRoYXQgdGhlcmUg aXMgbm8gS0FCSSB3aXRoIG1vZHVsZQ0KaW50ZXJmYWNlcywgdGhlIG1haW50YWluZXJzIG9mIHRo ZXNlIGhvb2tzIHNob3VsZCBoYXZlIG5vIGZlYXIgdGhhdA0KdGhleSB3aWxsIGJlY29tZSBhIHN0 YWJsZSBpbnRlcmZhY2UuDQoNCk5vdywgSSB3aWxsIGFsc28gcG9pbnQgb3V0IHRoYXQgaWYgb25l IG9mIHRoZSB0cmFjZXBvaW50IGhvb2tzIHByb3ZlIHRvDQpiZSB1c2VmdWwgZm9yIGEgZ2VuZXJp YyB0b29sLCB0aGVuIHRoaXMgY291bGQgYmUgYW4gaW5jZW50aXZlIHRvIGhhdmUNCnRoZSBtYWlu dGFpbmVyIGNoYW5nZSB0aGUgdHJhY2Vwb2ludCBob29rIGludG8gYSBmdWxsIGJsb3duDQpUUkFD RV9FVkVOVCgpIGFuZCB1cGdyYWRlIGl0IHRvIGFuIEFCSSwgYWZ0ZXIgaGF2aW5nIHRpbWUgdG8g c2VlIGhvdyBpdA0KaXMgdXNlZnVsLiBUaGlzIGlzIGEgYmV0dGVyIG1ldGhvZCB0aGFuIGhhdmlu ZyB0ZW5zIG9mIHRyYWNlIGV2ZW50cw0Kd2hlcmUgb25lIHJhbmRvbSBvbmUgcHJvdmVzIHRvIGJl IHVzZWZ1bCBmb3IgdG9vbHMgYW5kIHN1cnByaXNlcyB0aGUNCm1haW50YWluZXIgdGhhdCB0aGUg Y29kZSBpdCBhZmZlY3RzIGNhbiBubyBsb25nZXIgYmUgY2hhbmdlZC4NCg0KVGhvdWdodHM/DQoN Ci0tIFN0ZXZlDQoNCg0K