From mboxrd@z Thu Jan 1 00:00:00 1970 From: Travis Subject: Re: [PATCH 3/6] timekeeping: Make it safe to use the fast timekeeper while suspended Date: Thu, 12 Feb 2015 20:59:25 -0600 Message-ID: <54dd6ab5.a7233c0a.4503.ffffdd6a@mx.google.com> References: <8292243.ibkmfVtXac@vostro.rjw.lan> <1521825.MkZ1sG1M8S@vostro.rjw.lan> <2403461.IZYtJE89Ir@vostro.rjw.lan> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: base64 Return-path: In-Reply-To: <2403461.IZYtJE89Ir@vostro.rjw.lan> Sender: linux-kernel-owner@vger.kernel.org To: "Rafael J. Wysocki" Cc: Linux PM list , Alan Cox , Thomas Gleixner , John Stultz , Len Brown , Kristen Carlson Accardi , "Li, Aubrey" , LKML , ACPI Devel Maling List , Peter Zijlstra List-Id: linux-acpi@vger.kernel.org U291bmRzIGdvb2QgdG8gbWUhCgpPbiBGZWIgMTIsIDIwMTUgODowMyBQTSwgIlJhZmFlbCBKLiBX eXNvY2tpIiA8cmp3QHJqd3lzb2NraS5uZXQ+IHdyb3RlOgo+Cj4gT24gRnJpZGF5LCBGZWJydWFy eSAxMywgMjAxNSAwODo1MzozOCBBTSBKb2huIFN0dWx0eiB3cm90ZTogCj4gPiBPbiBXZWQsIEZl YiAxMSwgMjAxNSBhdCAxMjowMyBQTSwgUmFmYWVsIEouIFd5c29ja2kgPHJqd0Byand5c29ja2ku bmV0PiB3cm90ZTogCj4gPiA+IEZyb206IFJhZmFlbCBKLiBXeXNvY2tpIDxyYWZhZWwuai53eXNv Y2tpQGludGVsLmNvbT4gCj4gPiA+IAo+ID4gPiBUaGVvcmV0aWNhbGx5LCBrdGltZV9nZXRfbW9u b19mYXN0X25zKCkgbWF5IGJlIGV4ZWN1dGVkIGFmdGVyIAo+ID4gPiB0aW1la2VlcGluZyBoYXMg YmVlbiBzdXNwZW5kZWQgKG9yIGJlZm9yZSBpdCBpcyByZXN1bWVkKSB3aGljaCAKPiA+ID4gaW4g dHVybiBtYXkgbGVhZCB0byB1bmRlZmluZWQgYmVoYXZpb3IsIGZvciBleGFtcGxlLCB3aGVuIHRo ZSAKPiA+ID4gY2xvY2tzb3VyY2UgcmVhZCBmcm9tIHRpbWVrZWVwaW5nX2dldF9ucygpIGNhbGxl ZCBieSBpdCBpcyAKPiA+ID4gbm90IGFjY2Vzc2libGUgYXQgdGhhdCB0aW1lLiAKPiA+IAo+ID4g QW5kIHRoZSBjYWxsZXJzIG9mIHRoZSBrdGltZV9nZXRfbW9ub19mYXN0X25zKCkgaGF2ZSB0byBn ZXQgYmFjayBhIAo+ID4gdmFsdWU/IAo+Cj4gWWVzLCB0aGV5IGRvLiAKPgo+ID4gT3IgY2FuIHdl IHJldHVybiBhbiBlcnJvciBvbiB0aW1la2VlcGluZ19zdXNwZW5kZWQgbGlrZSB3ZSBkbyAKPiA+ IHcvIF9fZ2V0bnN0aW1lb2ZkYXk2NCgpPyAKPgo+IE5vLCB3ZSBjYW4ndC4gCj4KPiA+IEFsc28s IHdoYXQgZXhhY3RseSBpcyB0aGUgY2FzZSB3aGVuIHRoZSBjbG9ja3NvdXJjZSBiZWluZyByZWFk IGlzbid0IAo+ID4gYWNjZXNzaWJsZT8gSSBzZWUgdGhpcyBpcyBjb25kaXRpb25hbGl6ZWQgb24g Cj4gPiBDTE9DS19TT1VSQ0VfU1VTUEVORF9OT05TVE9QLCBzbyBpcyB0aGUgY29uY2VybiBvbiBy ZXN1bWUgd2UgcmVhZCB0aGUgCj4gPiBjbG9ja3NvdXJjZSBhbmQgaXRzIGJlZW4gcmVzZXQgY2F1 c2luZyBhIGNyYXp5IHRpbWUgdmFsdWU/IAo+Cj4gVGhlIGNsb2Nrc291cmNlJ3MgLT5zdXNwZW5k IG1ldGhvZCBtYXkgaGF2ZSBiZWVuIGNhbGxlZCAoZHVyaW5nIHN1c3BlbmQpIAo+IGFuZCBkZXBl bmRpbmcgb24gd2hhdCB0aGF0IGRpZCB3ZSBtYXkgZXZlbiBjcmFzaCB0aGluZ3MgdGhlb3JldGlj YWxseS4gCj4KPiBEdXJpbmcgcmVzdW1lLCBiZWZvcmUgdGhlIGNsb2Nrc291cmNlJ3MgLT5yZXN1 bWUgY2FsbGJhY2ssIGl0IG1heSBqdXN0IAo+IGJlIHVuZGVmaW5lZCBiZWhhdmlvciAocmFuZG9t IGRhdGEgZXRjKS4gCj4KPiBGb3Igc3lzdGVtIHN1c3BlbmQgYXMgd2UgaGF2ZSB0b2RheSB0aGUg d2luZG93IGlzIHF1aXRlIG5hcnJvdywgYnV0IGFmdGVyIAo+IHBhdGNoIFs0LzZdIGZyb20gdGhp cyBzZXJpZXMgc3VzcGVuZC10by1pZGxlIG1heSBzdXNwZW5kIHRpbWVrZWVwaW5nIGFuZCAKPiBq dXN0IHNpdCB0aGVyZSBpbiBpZGxlIGZvciBleHRlbmRlZCB0aW1lIChob3VycyBldmVuKSB3aGlj aCBicm9hZGVucyB0aGUgCj4gcG90ZW50aWFsIGV4cG9zdXJlIHF1aXRlIGEgYml0LiAKPgo+IE9m IGNvdXJzZSwgaXQgZG9lcyB0aGF0IHdpdGggaW50ZXJydXB0cyBkaXNhYmxlZCwgYnV0IGt0aW1l X2dldF9tb25vX2Zhc3RfbnMoKSAKPiBpcyBmb3IgTk1JLCBzbyB0aGVvcmV0aWNhbGx5LCBpZiBh biBOTUkgaGFwcGVucyB3aGlsZSB3ZSdyZSBpbiBzdXNwZW5kLXRvLWlkbGUgCj4gd2l0aCB0aW1l a2VlcGluZyBzdXNwZW5kZWQgYW5kIHRoZSBjbG9ja3NvdXJjZSBpcyBub3QgQ0xPQ0tfU09VUkNF X1NVU1BFTkRfTk9OU1RPUCAKPiBhbmQgdGhlIE5NSSBjYWxscyBrdGltZV9nZXRfbW9ub19mYXN0 X25zKCksIHN0cmFuZ2UgYW5kIHVuZGVzaXJhYmxlIHRoaW5ncyBtYXkgCj4gaGFwcGVuLiAKPgo+ ID4gPiBQcmV2ZW50IHRoYXQgZnJvbSBoYXBwZW5pbmcgYnkgc2V0dGluZyB1cCBhIGR1bW15IHJl YWRvdXQgYmFzZSBmb3IgCj4gPiA+IHRoZSBmYXN0IHRpbWVrZWVwZXIgZHVyaW5nIHRpbWVrZWVw aW5nX3N1c3BlbmQoKSBzdWNoIHRoYXQgaXQgd2lsbCAKPiA+ID4gYWx3YXlzIHJldHVybiB0aGUg c2FtZSBudW1iZXIgb2YgY3ljbGVzLiAKPiA+ID4gCj4gPiA+IEFmdGVyIHRoZSBsYXN0IHRpbWVr ZWVwaW5nX3VwZGF0ZSgpIGluIHRpbWVrZWVwaW5nX3N1c3BlbmQoKSB0aGUgCj4gPiA+IGNsb2Nr c291cmNlIGlzIHJlYWQgYW5kIHRoZSByZXN1bHQgaXMgc3RvcmVkIGFzIGN5Y2xlc19hdF9zdXNw ZW5kLiAKPiA+ID4gVGhlIHJlYWRvdXQgYmFzZSBmcm9tIHRoZSBjdXJyZW50IHRpbWVrZWVwZXIg aXMgY29waWVkIG9udG8gdGhlIAo+ID4gPiBkdW1teSBhbmQgdGhlIC0+cmVhZCBwb2ludGVyIG9m IHRoZSBkdW1teSBpcyBzZXQgdG8gYSByb3V0aW5lIAo+ID4gPiB1bmNvbmRpdGlvbmFsbHkgcmV0 dXJuaW5nIGN5Y2xlc19hdF9zdXNwZW5kLsKgIE5leHQsIHRoZSBkdW1teSBpcyAKPiA+ID4gcGFz c2VkIHRvIHVwZGF0ZV9mYXN0X3RpbWVrZWVwZXIoKS4gCj4gPiA+IAo+ID4gPiBUaGVuLCBrdGlt ZV9nZXRfbW9ub19mYXN0X25zKCkgd2lsbCB3b3JrIHVudGlsIHRoZSBzdWJzZXF1ZW50IAo+ID4g PiB0aW1la2VlcGluZ19yZXN1bWUoKSBhbmQgdGhlIHByb3BlciByZWFkb3V0IGJhc2UgZm9yIHRo ZSBmYXN0IAo+ID4gPiB0aW1la2VlcGVyIHdpbGwgYmUgcmVzdG9yZWQgYnkgdGhlIHRpbWVrZWVw aW5nX3VwZGF0ZSgpIGNhbGxlZCAKPiA+ID4gcmlnaHQgYWZ0ZXIgY2xlYXJpbmcgdGltZWtlZXBp bmdfc3VzcGVuZGVkLiAKPiA+ID4gCj4gPiA+IFNpZ25lZC1vZmYtYnk6IFJhZmFlbCBKLiBXeXNv Y2tpIDxyYWZhZWwuai53eXNvY2tpQGludGVsLmNvbT4gCj4gPiA+IC0tLSAKPiA+ID7CoCBrZXJu ZWwvdGltZS90aW1la2VlcGluZy5jIHzCoMKgIDIyICsrKysrKysrKysrKysrKysrKysrKysgCj4g PiA+wqAgMSBmaWxlIGNoYW5nZWQsIDIyIGluc2VydGlvbnMoKykgCj4gPiA+IAo+ID4gPiBJbmRl eDogbGludXgtcG0va2VybmVsL3RpbWUvdGltZWtlZXBpbmcuYyAKPiA+ID4gPT09PT09PT09PT09 PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PSAK PiA+ID4gLS0tIGxpbnV4LXBtLm9yaWcva2VybmVsL3RpbWUvdGltZWtlZXBpbmcuYyAKPiA+ID4g KysrIGxpbnV4LXBtL2tlcm5lbC90aW1lL3RpbWVrZWVwaW5nLmMgCj4gPiA+IEBAIC0xMjQ5LDkg KzEyNDksMjMgQEAgc3RhdGljIHZvaWQgdGltZWtlZXBpbmdfcmVzdW1lKHZvaWQpIAo+ID4gPsKg wqDCoMKgwqDCoMKgwqAgaHJ0aW1lcnNfcmVzdW1lKCk7IAo+ID4gPsKgIH0gCj4gPiA+IAo+ID4g PiArLyogCj4gPiA+ICsgKiBEdW1teSByZWFkb3V0IGJhc2UgYW5kIHN1c3BlbmQtdGltZSBjeWNs ZXMgdmFsdWUgZm9yIHRoZSBmYXN0IHRpbWVrZWVwZXIgdG8gCj4gPiA+ICsgKiB3b3JrIGluIGEg Y29uc2lzdGVudCB3YXkgYWZ0ZXIgdGltZWtlZXBpbmcgaGFzIGJlZW4gc3VzcGVuZGVkIGlmIHRo ZSBjb3JlIAo+ID4gPiArICogdGltZWtlZXBlciBjbG9ja3NvdXJjZSBpcyBub3Qgc3VzcGVuZC1u b25zdG9wLiAKPiA+ID4gKyAqLyAKPiA+ID4gK3N0YXRpYyBzdHJ1Y3QgdGtfcmVhZF9iYXNlIHRr cl9kdW1teTsgCj4gPiA+ICtzdGF0aWMgY3ljbGVfdCBjeWNsZXNfYXRfc3VzcGVuZDsgCj4gPiA+ ICsgCj4gPiA+ICtzdGF0aWMgY3ljbGVfdCBkdW1teV9jbG9ja19yZWFkKHN0cnVjdCBjbG9ja3Nv dXJjZSAqY3MpIAo+ID4gPiAreyAKPiA+ID4gK8KgwqDCoMKgwqDCoCByZXR1cm4gY3ljbGVzX2F0 X3N1c3BlbmQ7IAo+ID4gPiArfSAKPiA+ID4gKyAKPiA+ID7CoCBzdGF0aWMgaW50IHRpbWVrZWVw aW5nX3N1c3BlbmQodm9pZCkgCj4gPiA+wqAgeyAKPiA+ID7CoMKgwqDCoMKgwqDCoMKgIHN0cnVj dCB0aW1la2VlcGVyICp0ayA9ICZ0a19jb3JlLnRpbWVrZWVwZXI7IAo+ID4gPiArwqDCoMKgwqDC oMKgIHN0cnVjdCBjbG9ja3NvdXJjZSAqY2xvY2sgPSB0ay0+dGtyLmNsb2NrOyAKPiA+ID7CoMKg wqDCoMKgwqDCoMKgIHVuc2lnbmVkIGxvbmcgZmxhZ3M7IAo+ID4gPsKgwqDCoMKgwqDCoMKgwqAg c3RydWN0IHRpbWVzcGVjNjTCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgIGRlbHRhLCBkZWx0 YV9kZWx0YTsgCj4gPiA+wqDCoMKgwqDCoMKgwqDCoCBzdGF0aWMgc3RydWN0IHRpbWVzcGVjNjTC oMKgwqDCoMKgwqDCoCBvbGRfZGVsdGE7IAo+ID4gPiBAQCAtMTI5NCw2ICsxMzA4LDE0IEBAIHN0 YXRpYyBpbnQgdGltZWtlZXBpbmdfc3VzcGVuZCh2b2lkKSAKPiA+ID7CoMKgwqDCoMKgwqDCoMKg IH0gCj4gPiA+IAo+ID4gPsKgwqDCoMKgwqDCoMKgwqAgdGltZWtlZXBpbmdfdXBkYXRlKHRrLCBU S19NSVJST1IpOyAKPiA+ID4gKyAKPiA+ID4gK8KgwqDCoMKgwqDCoCBpZiAoIShjbG9jay0+Zmxh Z3MgJiBDTE9DS19TT1VSQ0VfU1VTUEVORF9OT05TVE9QKSkgeyAKPiA+ID4gK8KgwqDCoMKgwqDC oMKgwqDCoMKgwqDCoMKgwqAgbWVtY3B5KCZ0a3JfZHVtbXksICZ0ay0+dGtyLCBzaXplb2YodGty X2R1bW15KSk7IAo+ID4gPiArwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoCBjeWNsZXNfYXRf c3VzcGVuZCA9IHRrLT50a3IucmVhZChjbG9jayk7IAo+ID4gPiArwqDCoMKgwqDCoMKgwqDCoMKg wqDCoMKgwqDCoCB0a3JfZHVtbXkucmVhZCA9IGR1bW15X2Nsb2NrX3JlYWQ7IAo+ID4gPiArwqDC oMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoCB1cGRhdGVfZmFzdF90aW1la2VlcGVyKCZ0a3JfZHVt bXkpOyAKPiA+ID4gK8KgwqDCoMKgwqDCoCB9IAo+ID4gCj4gPiBJdHMgYSBsaXR0bGUgdWdseS4u LiB0aG91Z2ggSSdtIG5vdCBzdXJlIEkgaGF2ZSBhIGJldHRlciBpZGVhIHJpZ2h0IG9mZi4gCj4g PiAKPiA+IHRoYW5rcyAKPiA+IC1qb2huIAo+ID4gLS0gCj4gPiBUbyB1bnN1YnNjcmliZSBmcm9t IHRoaXMgbGlzdDogc2VuZCB0aGUgbGluZSAidW5zdWJzY3JpYmUgbGludXgta2VybmVsIiBpbiAK PiA+IHRoZSBib2R5IG9mIGEgbWVzc2FnZSB0byBtYWpvcmRvbW9Admdlci5rZXJuZWwub3JnIAo+ ID4gTW9yZSBtYWpvcmRvbW8gaW5mbyBhdMKgIGh0dHA6Ly92Z2VyLmtlcm5lbC5vcmcvbWFqb3Jk b21vLWluZm8uaHRtbCAKPiA+IFBsZWFzZSByZWFkIHRoZSBGQVEgYXTCoCBodHRwOi8vd3d3LnR1 eC5vcmcvbGttbC8gCj4KPiAtLSAKPiBJIHNwZWFrIG9ubHkgZm9yIG15c2VsZi4gCj4gUmFmYWVs IEouIFd5c29ja2ksIEludGVsIE9wZW4gU291cmNlIFRlY2hub2xvZ3kgQ2VudGVyLiAKPiAtLSAK PiBUbyB1bnN1YnNjcmliZSBmcm9tIHRoaXMgbGlzdDogc2VuZCB0aGUgbGluZSAidW5zdWJzY3Jp YmUgbGludXgta2VybmVsIiBpbiAKPiB0aGUgYm9keSBvZiBhIG1lc3NhZ2UgdG8gbWFqb3Jkb21v QHZnZXIua2VybmVsLm9yZyAKPiBNb3JlIG1ham9yZG9tbyBpbmZvIGF0wqAgaHR0cDovL3ZnZXIu a2VybmVsLm9yZy9tYWpvcmRvbW8taW5mby5odG1sIAo+IFBsZWFzZSByZWFkIHRoZSBGQVEgYXTC oCBodHRwOi8vd3d3LnR1eC5vcmcvbGttbC8gCg==