From mboxrd@z Thu Jan 1 00:00:00 1970 From: Konrad Rzeszutek Wilk Subject: Re: [PATCH for-next 1/2] xen/x86/alternatives: Do not use sync_core() to serialize I$ Date: Fri, 19 May 2017 20:29:18 -0400 Message-ID: <20170520002918.GD21850@char.us.oracle.com> References: <1495219747-26305-1-git-send-email-andrew.cooper3@citrix.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Content-Disposition: inline In-Reply-To: <1495219747-26305-1-git-send-email-andrew.cooper3@citrix.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xen.org Sender: "Xen-devel" To: Andrew Cooper Cc: Wei Liu , Jan Beulich , Xen-devel List-Id: xen-devel@lists.xenproject.org T24gRnJpLCBNYXkgMTksIDIwMTcgYXQgMDc6NDk6MDZQTSArMDEwMCwgQW5kcmV3IENvb3BlciB3 cm90ZToKPiBGcm9tOiBCb3Jpc2xhdiBQZXRrb3YgPGJwQHN1c2UuZGU+Cj4gCj4gV2UgdXNlIHN5 bmNfY29yZSgpIGluIHRoZSBhbHRlcm5hdGl2ZXMgY29kZSB0byBzdG9wIHNwZWN1bGF0aXZlCj4g ZXhlY3V0aW9uIG9mIHByZWZldGNoZWQgaW5zdHJ1Y3Rpb25zIGJlY2F1c2Ugd2UgYXJlIHBvdGVu dGlhbGx5IGNoYW5naW5nCj4gdGhlbSBhbmQgZG9uJ3Qgd2FudCB0byBleGVjdXRlIHN0YWxlIGJ5 dGVzLgo+IAo+IFdoYXQgaXQgZG9lcyBvbiBtb3N0IG1hY2hpbmVzIGlzIGNhbGwgQ1BVSUQgd2hp Y2ggaXMgYSBzZXJpYWxpemluZwo+IGluc3RydWN0aW9uLiBBbmQgdGhhdCdzIGV4cGVuc2l2ZS4K PiAKPiBIb3dldmVyLCB0aGUgaW5zdHJ1Y3Rpb24gY2FjaGUgaXMgc2VyaWFsaXplZCB3aGVuIHdl J3JlIG9uIHRoZSBsb2NhbCBDUFUKPiBhbmQgYXJlIGNoYW5naW5nIHRoZSBkYXRhIHRocm91Z2gg dGhlIHNhbWUgdmlydHVhbCBhZGRyZXNzLiBTbyB0aGVuLCB3ZQo+IGRvbid0IG5lZWQgdGhlIHNl cmlhbGl6aW5nIENQVUlEIGJ1dCBhIHNpbXBsZSBjb250cm9sIGZsb3cgY2hhbmdlLiBMYXN0Cj4g YmVpbmcgYWNjb21wbGlzaGVkIHdpdGggYSBDQUxML1JFVCB3aGljaCB0aGUgbm9pbmxpbmUgY2F1 c2VzLgo+IAo+IFN1Z2dlc3RlZC1ieTogTGludXMgVG9ydmFsZHMgPHRvcnZhbGRzQGxpbnV4LWZv dW5kYXRpb24ub3JnPgo+IFNpZ25lZC1vZmYtYnk6IEJvcmlzbGF2IFBldGtvdiA8YnBAc3VzZS5k ZT4KPiBSZXZpZXdlZC1ieTogQW5keSBMdXRvbWlyc2tpIDxsdXRvQGtlcm5lbC5vcmc+Cj4gW0xp bnV4IGNvbW1pdCAzNGJmYWIwZWFmMGZiNWM2ZmIxNGM2YjQwMTNiMDZjZGM3OTg0NDY2XQo+IAo+ IFBvcnRlZCB0byBYZW4uCj4gCj4gU2lnbmVkLW9mZi1ieTogQW5kcmV3IENvb3BlciA8YW5kcmV3 LmNvb3BlcjNAY2l0cml4LmNvbT4KPiAtLS0KPiBDQzogSmFuIEJldWxpY2ggPEpCZXVsaWNoQHN1 c2UuY29tPgo+IC0tLQo+ICB4ZW4vYXJjaC94ODYvYWx0ZXJuYXRpdmUuYyB8IDExICsrKysrKy0t LS0tCj4gIHhlbi9hcmNoL3g4Ni9saXZlcGF0Y2guYyAgIHwgMjAgKysrKysrKysrKysrKysrLS0t LS0KCldlaXJkIHRoYXQgdGhlIENDIGxpc3QgZGlkbid0IHBpY2sgbWUgdXAuCgpCdXQgQWNrZWQt Ynkgb24gdGhlIGxpdmVwYXRjaCBwYXJ0LgoKPiAgMiBmaWxlcyBjaGFuZ2VkLCAyMSBpbnNlcnRp b25zKCspLCAxMCBkZWxldGlvbnMoLSkKPiAKPiBkaWZmIC0tZ2l0IGEveGVuL2FyY2gveDg2L2Fs dGVybmF0aXZlLmMgYi94ZW4vYXJjaC94ODYvYWx0ZXJuYXRpdmUuYwo+IGluZGV4IDZlYWExMGYu LjY1MDYyYzIgMTAwNjQ0Cj4gLS0tIGEveGVuL2FyY2gveDg2L2FsdGVybmF0aXZlLmMKPiArKysg Yi94ZW4vYXJjaC94ODYvYWx0ZXJuYXRpdmUuYwo+IEBAIC0xMjgsMTMgKzEyOCwxNCBAQCB2b2lk IGluaXRfb3JfbGl2ZXBhdGNoIGFkZF9ub3BzKHZvaWQgKmluc25zLCB1bnNpZ25lZCBpbnQgbGVu KQo+ICAgKgo+ICAgKiBZb3Ugc2hvdWxkIHJ1biB0aGlzIHdpdGggaW50ZXJydXB0cyBkaXNhYmxl ZCBvciBvbiBjb2RlIHRoYXQgaXMgbm90Cj4gICAqIGV4ZWN1dGluZy4KPiArICoKPiArICogIm5v aW5saW5lIiB0byBjYXVzZSBjb250cm9sIGZsb3cgY2hhbmdlIGFuZCB0aHVzIGludmFsaWRhdGUg SSQgYW5kCj4gKyAqIGNhdXNlIHJlZmV0Y2ggYWZ0ZXIgbW9kaWZpY2F0aW9uLgo+ICAgKi8KPiAt c3RhdGljIHZvaWQgKmluaXRfb3JfbGl2ZXBhdGNoIHRleHRfcG9rZSh2b2lkICphZGRyLCBjb25z dCB2b2lkICpvcGNvZGUsIHNpemVfdCBsZW4pCj4gK3N0YXRpYyB2b2lkICppbml0X29yX2xpdmVw YXRjaCBub2lubGluZQo+ICt0ZXh0X3Bva2Uodm9pZCAqYWRkciwgY29uc3Qgdm9pZCAqb3Bjb2Rl LCBzaXplX3QgbGVuKQo+ICB7Cj4gLSAgICBtZW1jcHkoYWRkciwgb3Bjb2RlLCBsZW4pOwo+IC0g ICAgc3luY19jb3JlKCk7Cj4gLQo+IC0gICAgcmV0dXJuIGFkZHI7Cj4gKyAgICByZXR1cm4gbWVt Y3B5KGFkZHIsIG9wY29kZSwgbGVuKTsKPiAgfQo+ICAKPiAgLyoKPiBkaWZmIC0tZ2l0IGEveGVu L2FyY2gveDg2L2xpdmVwYXRjaC5jIGIveGVuL2FyY2gveDg2L2xpdmVwYXRjaC5jCj4gaW5kZXgg OTY2M2VmNi4uZGQ1MGRkMSAxMDA2NDQKPiAtLS0gYS94ZW4vYXJjaC94ODYvbGl2ZXBhdGNoLmMK PiArKysgYi94ZW4vYXJjaC94ODYvbGl2ZXBhdGNoLmMKPiBAQCAtNDYsNyArNDYsMTEgQEAgaW50 IGFyY2hfbGl2ZXBhdGNoX3ZlcmlmeV9mdW5jKGNvbnN0IHN0cnVjdCBsaXZlcGF0Y2hfZnVuYyAq ZnVuYykKPiAgICAgIHJldHVybiAwOwo+ICB9Cj4gIAo+IC12b2lkIGFyY2hfbGl2ZXBhdGNoX2Fw cGx5KHN0cnVjdCBsaXZlcGF0Y2hfZnVuYyAqZnVuYykKPiArLyoKPiArICogIm5vaW5saW5lIiB0 byBjYXVzZSBjb250cm9sIGZsb3cgY2hhbmdlIGFuZCB0aHVzIGludmFsaWRhdGUgSSQgYW5kCj4g KyAqIGNhdXNlIHJlZmV0Y2ggYWZ0ZXIgbW9kaWZpY2F0aW9uLgo+ICsgKi8KPiArdm9pZCBub2lu bGluZSBhcmNoX2xpdmVwYXRjaF9hcHBseShzdHJ1Y3QgbGl2ZXBhdGNoX2Z1bmMgKmZ1bmMpCj4g IHsKPiAgICAgIHVpbnQ4X3QgKm9sZF9wdHI7Cj4gICAgICB1aW50OF90IGluc25bc2l6ZW9mKGZ1 bmMtPm9wYXF1ZSldOwo+IEBAIC03NSwxNSArNzksMjEgQEAgdm9pZCBhcmNoX2xpdmVwYXRjaF9h cHBseShzdHJ1Y3QgbGl2ZXBhdGNoX2Z1bmMgKmZ1bmMpCj4gICAgICBtZW1jcHkob2xkX3B0ciwg aW5zbiwgbGVuKTsKPiAgfQo+ICAKPiAtdm9pZCBhcmNoX2xpdmVwYXRjaF9yZXZlcnQoY29uc3Qg c3RydWN0IGxpdmVwYXRjaF9mdW5jICpmdW5jKQo+ICsvKgo+ICsgKiAibm9pbmxpbmUiIHRvIGNh dXNlIGNvbnRyb2wgZmxvdyBjaGFuZ2UgYW5kIHRodXMgaW52YWxpZGF0ZSBJJCBhbmQKPiArICog Y2F1c2UgcmVmZXRjaCBhZnRlciBtb2RpZmljYXRpb24uCj4gKyAqLwo+ICt2b2lkIG5vaW5saW5l IGFyY2hfbGl2ZXBhdGNoX3JldmVydChjb25zdCBzdHJ1Y3QgbGl2ZXBhdGNoX2Z1bmMgKmZ1bmMp Cj4gIHsKPiAgICAgIG1lbWNweShmdW5jLT5vbGRfYWRkciwgZnVuYy0+b3BhcXVlLCBsaXZlcGF0 Y2hfaW5zbl9sZW4oZnVuYykpOwo+ICB9Cj4gIAo+IC0vKiBTZXJpYWxpc2UgdGhlIENQVSBwaXBl bGluZS4gKi8KPiAtdm9pZCBhcmNoX2xpdmVwYXRjaF9wb3N0X2FjdGlvbih2b2lkKQo+ICsvKgo+ ICsgKiAibm9pbmxpbmUiIHRvIGNhdXNlIGNvbnRyb2wgZmxvdyBjaGFuZ2UgYW5kIHRodXMgaW52 YWxpZGF0ZSBJJCBhbmQKPiArICogY2F1c2UgcmVmZXRjaCBhZnRlciBtb2RpZmljYXRpb24uCj4g KyAqLwo+ICt2b2lkIG5vaW5saW5lIGFyY2hfbGl2ZXBhdGNoX3Bvc3RfYWN0aW9uKHZvaWQpCj4g IHsKPiAtICAgIGNwdWlkX2VheCgwKTsKPiAgfQo+ICAKPiAgc3RhdGljIG5taV9jYWxsYmFja190 ICpzYXZlZF9ubWlfY2FsbGJhY2s7Cj4gLS0gCj4gMi4xLjQKPiAKPiAKPiBfX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwo+IFhlbi1kZXZlbCBtYWlsaW5nIGxp c3QKPiBYZW4tZGV2ZWxAbGlzdHMueGVuLm9yZwo+IGh0dHBzOi8vbGlzdHMueGVuLm9yZy94ZW4t ZGV2ZWwKCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fClhl bi1kZXZlbCBtYWlsaW5nIGxpc3QKWGVuLWRldmVsQGxpc3RzLnhlbi5vcmcKaHR0cHM6Ly9saXN0 cy54ZW4ub3JnL3hlbi1kZXZlbAo=