From mboxrd@z Thu Jan 1 00:00:00 1970 From: Roger Pau =?utf-8?B?TW9ubsOp?= Subject: Re: [PATCH v2 07/12] x86/IRQ: fix locking around vector management Date: Mon, 13 May 2019 15:48:21 +0200 Message-ID: <20190513134821.pomwew6vmtibxvem@Air-de-Roger> References: <5CC6DD090200007800229E80@prv1-mh.provo.novell.com> <5CD2D2C8020000780022CCF2@prv1-mh.provo.novell.com> <5CD2D563020000780022CD40@prv1-mh.provo.novell.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from us1-rack-dfw2.inumbo.com ([104.130.134.6]) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1hQBJj-0004RY-SP for xen-devel@lists.xenproject.org; Mon, 13 May 2019 13:48:35 +0000 Content-Disposition: inline In-Reply-To: <5CD2D563020000780022CD40@prv1-mh.provo.novell.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" To: Jan Beulich Cc: xen-devel , Wei Liu , Andrew Cooper List-Id: xen-devel@lists.xenproject.org T24gV2VkLCBNYXkgMDgsIDIwMTkgYXQgMDc6MTA6NTlBTSAtMDYwMCwgSmFuIEJldWxpY2ggd3Jv dGU6Cj4gQWxsIG9mIF9fe2Fzc2lnbixiaW5kLGNsZWFyfV9pcnFfdmVjdG9yKCkgbWFuaXB1bGF0 ZSBzdHJ1Y3QgaXJxX2Rlc2MKPiBmaWVsZHMsIGFuZCBoZW5jZSBvdWdodCB0byBiZSBjYWxsZWQg d2l0aCB0aGUgZGVzY3JpcHRvciBsb2NrIGhlbGQgaW4KPiBhZGRpdGlvbiB0byB2ZWN0b3JfbG9j ay4gVGhpcyBpcyBjdXJyZW50bHkgdGhlIGNhc2UgZm9yIG9ubHkKPiBzZXRfZGVzY19hZmZpbml0 eSgpIChpbiB0aGUgY29tbW9uIGNhc2UpIGFuZCBkZXN0cm95X2lycSgpLCB3aGljaCBhbHNvCj4g Y2xhcmlmaWVzIHdoYXQgdGhlIG5lc3RpbmcgYmVoYXZpb3IgYmV0d2VlbiB0aGUgbG9ja3MgaGFz IHRvIGJlLgo+IFJlZmxlY3QgdGhlIG5ldyBleHBlY3RhdGlvbiBieSBoYXZpbmcgdGhlc2UgZnVu Y3Rpb25zIGFsbCB0YWtlIGEKPiBkZXNjcmlwdG9yIGFzIHBhcmFtZXRlciBpbnN0ZWFkIG9mIGFu IGludGVycnVwdCBudW1iZXIuCj4gCj4gQWxzbyB0YWtlIGNhcmUgb2YgdGhlIHR3byBzcGVjaWFs IGNhc2VzIG9mIGNhbGxzIHRvIHNldF9kZXNjX2FmZmluaXR5KCk6Cj4gc2V0X2lvYXBpY19hZmZp bml0eV9pcnEoKSBhbmQgVlQtZCdzIGRtYV9tc2lfc2V0X2FmZmluaXR5KCkgZ2V0IGNhbGxlZAo+ IGRpcmVjdGx5IGFzIHdlbGwsIGFuZCBpbiB0aGVzZSBjYXNlcyB0aGUgZGVzY3JpcHRvciBsb2Nr cyBoYWRuJ3QgZ290Cj4gYWNxdWlyZWQgdGlsbCBub3cuIEZvciBzZXRfaW9hcGljX2FmZmluaXR5 X2lycSgpIHRoaXMgbWVhbnMgYWNxdWlyaW5nIC8KPiByZWxlYXNpbmcgb2YgdGhlIElPLUFQSUMg bG9jayBjYW4gYmUgcGxhaW4gc3Bpbl97LHVufWxvY2soKSB0aGVuLgo+IAo+IERyb3Agb25lIG9m IHRoZSB0d28gbGVhZGluZyB1bmRlcnNjb3JlcyBmcm9tIGFsbCB0aHJlZSBmdW5jdGlvbnMgYXQK PiB0aGUgc2FtZSB0aW1lLgo+IAo+IFRoZXJlJ3Mgb25lIGNhc2UgbGVmdCB3aGVyZSBkZXNjcmlw dG9ycyBnZXQgbWFuaXB1bGF0ZWQgd2l0aCBqdXN0Cj4gdmVjdG9yX2xvY2sgaGVsZDogc2V0dXBf dmVjdG9yX2lycSgpIGFzc3VtZXMgaXRzIGNhbGxlciB0byBhY3F1aXJlCj4gdmVjdG9yX2xvY2ss IGFuZCBoZW5jZSBjYW4ndCBpdHNlbGYgYWNxdWlyZSB0aGUgZGVzY3JpcHRvciBsb2NrcyAod3Jv bmcKPiBsb2NrIG9yZGVyKS4gSSBkb24ndCBjdXJyZW50bHkgc2VlIGhvdyB0byBhZGRyZXNzIHRo aXMuCj4gCj4gU2lnbmVkLW9mZi1ieTogSmFuIEJldWxpY2ggPGpiZXVsaWNoQHN1c2UuY29tPgoK UmV2aWV3ZWQtYnk6IFJvZ2VyIFBhdSBNb25uw6kgPHJvZ2VyLnBhdUBjaXRyaXguY29tPgoKPiAt LS0gYS94ZW4vZHJpdmVycy9wYXNzdGhyb3VnaC92dGQvaW9tbXUuYwo+ICsrKyBiL3hlbi9kcml2 ZXJzL3Bhc3N0aHJvdWdoL3Z0ZC9pb21tdS5jCj4gQEAgLTIxMzQsMTEgKzIxMzQsMTYgQEAgc3Rh dGljIHZvaWQgYWRqdXN0X2lycV9hZmZpbml0eShzdHJ1Y3QgYQo+ICAgICAgdW5zaWduZWQgaW50 IG5vZGUgPSByaHNhID8gcHhtX3RvX25vZGUocmhzYS0+cHJveGltaXR5X2RvbWFpbikKPiAgICAg ICAgICAgICAgICAgICAgICAgICAgICAgICA6IE5VTUFfTk9fTk9ERTsKPiAgICAgIGNvbnN0IGNw dW1hc2tfdCAqY3B1bWFzayA9ICZjcHVfb25saW5lX21hcDsKPiArICAgIHN0cnVjdCBpcnFfZGVz YyAqZGVzYzsKPiAgCj4gICAgICBpZiAoIG5vZGUgPCBNQVhfTlVNTk9ERVMgJiYgbm9kZV9vbmxp bmUobm9kZSkgJiYKPiAgICAgICAgICAgY3B1bWFza19pbnRlcnNlY3RzKCZub2RlX3RvX2NwdW1h c2sobm9kZSksIGNwdW1hc2spICkKPiAgICAgICAgICBjcHVtYXNrID0gJm5vZGVfdG9fY3B1bWFz ayhub2RlKTsKPiAtICAgIGRtYV9tc2lfc2V0X2FmZmluaXR5KGlycV90b19kZXNjKGRyaGQtPmlv bW11LT5tc2kuaXJxKSwgY3B1bWFzayk7Cj4gKwo+ICsgICAgZGVzYyA9IGlycV90b19kZXNjKGRy aGQtPmlvbW11LT5tc2kuaXJxKTsKPiArICAgIHNwaW5fbG9ja19pcnEoJmRlc2MtPmxvY2spOwoK SSB3b3VsZCB1c2UgdGhlIGlycXNhdmUvaXJxcmVzdG9yZSB2YXJpYW50cyBoZXJlIGZvciBleHRy YSBzYWZldHkuCgpUaGFua3MsIFJvZ2VyLgoKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX18KWGVuLWRldmVsIG1haWxpbmcgbGlzdApYZW4tZGV2ZWxAbGlzdHMu eGVucHJvamVjdC5vcmcKaHR0cHM6Ly9saXN0cy54ZW5wcm9qZWN0Lm9yZy9tYWlsbWFuL2xpc3Rp bmZvL3hlbi1kZXZlbA== From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.9 required=3.0 tests=FROM_EXCESS_BASE64, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,USER_AGENT_NEOMUTT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2D2F9C04AA7 for ; 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Mon, 13 May 2019 13:48:34 +0000 (UTC) X-IronPort-AV: E=Sophos;i="5.60,465,1549929600"; d="scan'208";a="89708470" Date: Mon, 13 May 2019 15:48:21 +0200 From: Roger Pau =?utf-8?B?TW9ubsOp?= To: Jan Beulich Message-ID: <20190513134821.pomwew6vmtibxvem@Air-de-Roger> References: <5CC6DD090200007800229E80@prv1-mh.provo.novell.com> <5CD2D2C8020000780022CCF2@prv1-mh.provo.novell.com> <5CD2D563020000780022CD40@prv1-mh.provo.novell.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <5CD2D563020000780022CD40@prv1-mh.provo.novell.com> User-Agent: NeoMutt/20180716 X-ClientProxiedBy: AMSPEX02CAS01.citrite.net (10.69.22.112) To AMSPEX02CL02.citrite.net (10.69.22.126) Subject: Re: [Xen-devel] [PATCH v2 07/12] x86/IRQ: fix locking around vector management X-BeenThere: xen-devel@lists.xenproject.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Cc: xen-devel , Wei Liu , Andrew Cooper Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: base64 Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" Message-ID: <20190513134821.DXiDIxNK9vQ-8b0qGSgkcR_HCmECFas14P94A0gQgrI@z> T24gV2VkLCBNYXkgMDgsIDIwMTkgYXQgMDc6MTA6NTlBTSAtMDYwMCwgSmFuIEJldWxpY2ggd3Jv dGU6Cj4gQWxsIG9mIF9fe2Fzc2lnbixiaW5kLGNsZWFyfV9pcnFfdmVjdG9yKCkgbWFuaXB1bGF0 ZSBzdHJ1Y3QgaXJxX2Rlc2MKPiBmaWVsZHMsIGFuZCBoZW5jZSBvdWdodCB0byBiZSBjYWxsZWQg d2l0aCB0aGUgZGVzY3JpcHRvciBsb2NrIGhlbGQgaW4KPiBhZGRpdGlvbiB0byB2ZWN0b3JfbG9j ay4gVGhpcyBpcyBjdXJyZW50bHkgdGhlIGNhc2UgZm9yIG9ubHkKPiBzZXRfZGVzY19hZmZpbml0 eSgpIChpbiB0aGUgY29tbW9uIGNhc2UpIGFuZCBkZXN0cm95X2lycSgpLCB3aGljaCBhbHNvCj4g Y2xhcmlmaWVzIHdoYXQgdGhlIG5lc3RpbmcgYmVoYXZpb3IgYmV0d2VlbiB0aGUgbG9ja3MgaGFz IHRvIGJlLgo+IFJlZmxlY3QgdGhlIG5ldyBleHBlY3RhdGlvbiBieSBoYXZpbmcgdGhlc2UgZnVu Y3Rpb25zIGFsbCB0YWtlIGEKPiBkZXNjcmlwdG9yIGFzIHBhcmFtZXRlciBpbnN0ZWFkIG9mIGFu IGludGVycnVwdCBudW1iZXIuCj4gCj4gQWxzbyB0YWtlIGNhcmUgb2YgdGhlIHR3byBzcGVjaWFs IGNhc2VzIG9mIGNhbGxzIHRvIHNldF9kZXNjX2FmZmluaXR5KCk6Cj4gc2V0X2lvYXBpY19hZmZp bml0eV9pcnEoKSBhbmQgVlQtZCdzIGRtYV9tc2lfc2V0X2FmZmluaXR5KCkgZ2V0IGNhbGxlZAo+ IGRpcmVjdGx5IGFzIHdlbGwsIGFuZCBpbiB0aGVzZSBjYXNlcyB0aGUgZGVzY3JpcHRvciBsb2Nr cyBoYWRuJ3QgZ290Cj4gYWNxdWlyZWQgdGlsbCBub3cuIEZvciBzZXRfaW9hcGljX2FmZmluaXR5 X2lycSgpIHRoaXMgbWVhbnMgYWNxdWlyaW5nIC8KPiByZWxlYXNpbmcgb2YgdGhlIElPLUFQSUMg bG9jayBjYW4gYmUgcGxhaW4gc3Bpbl97LHVufWxvY2soKSB0aGVuLgo+IAo+IERyb3Agb25lIG9m IHRoZSB0d28gbGVhZGluZyB1bmRlcnNjb3JlcyBmcm9tIGFsbCB0aHJlZSBmdW5jdGlvbnMgYXQK PiB0aGUgc2FtZSB0aW1lLgo+IAo+IFRoZXJlJ3Mgb25lIGNhc2UgbGVmdCB3aGVyZSBkZXNjcmlw dG9ycyBnZXQgbWFuaXB1bGF0ZWQgd2l0aCBqdXN0Cj4gdmVjdG9yX2xvY2sgaGVsZDogc2V0dXBf dmVjdG9yX2lycSgpIGFzc3VtZXMgaXRzIGNhbGxlciB0byBhY3F1aXJlCj4gdmVjdG9yX2xvY2ss IGFuZCBoZW5jZSBjYW4ndCBpdHNlbGYgYWNxdWlyZSB0aGUgZGVzY3JpcHRvciBsb2NrcyAod3Jv bmcKPiBsb2NrIG9yZGVyKS4gSSBkb24ndCBjdXJyZW50bHkgc2VlIGhvdyB0byBhZGRyZXNzIHRo aXMuCj4gCj4gU2lnbmVkLW9mZi1ieTogSmFuIEJldWxpY2ggPGpiZXVsaWNoQHN1c2UuY29tPgoK UmV2aWV3ZWQtYnk6IFJvZ2VyIFBhdSBNb25uw6kgPHJvZ2VyLnBhdUBjaXRyaXguY29tPgoKPiAt LS0gYS94ZW4vZHJpdmVycy9wYXNzdGhyb3VnaC92dGQvaW9tbXUuYwo+ICsrKyBiL3hlbi9kcml2 ZXJzL3Bhc3N0aHJvdWdoL3Z0ZC9pb21tdS5jCj4gQEAgLTIxMzQsMTEgKzIxMzQsMTYgQEAgc3Rh dGljIHZvaWQgYWRqdXN0X2lycV9hZmZpbml0eShzdHJ1Y3QgYQo+ICAgICAgdW5zaWduZWQgaW50 IG5vZGUgPSByaHNhID8gcHhtX3RvX25vZGUocmhzYS0+cHJveGltaXR5X2RvbWFpbikKPiAgICAg ICAgICAgICAgICAgICAgICAgICAgICAgICA6IE5VTUFfTk9fTk9ERTsKPiAgICAgIGNvbnN0IGNw dW1hc2tfdCAqY3B1bWFzayA9ICZjcHVfb25saW5lX21hcDsKPiArICAgIHN0cnVjdCBpcnFfZGVz YyAqZGVzYzsKPiAgCj4gICAgICBpZiAoIG5vZGUgPCBNQVhfTlVNTk9ERVMgJiYgbm9kZV9vbmxp bmUobm9kZSkgJiYKPiAgICAgICAgICAgY3B1bWFza19pbnRlcnNlY3RzKCZub2RlX3RvX2NwdW1h c2sobm9kZSksIGNwdW1hc2spICkKPiAgICAgICAgICBjcHVtYXNrID0gJm5vZGVfdG9fY3B1bWFz ayhub2RlKTsKPiAtICAgIGRtYV9tc2lfc2V0X2FmZmluaXR5KGlycV90b19kZXNjKGRyaGQtPmlv bW11LT5tc2kuaXJxKSwgY3B1bWFzayk7Cj4gKwo+ICsgICAgZGVzYyA9IGlycV90b19kZXNjKGRy aGQtPmlvbW11LT5tc2kuaXJxKTsKPiArICAgIHNwaW5fbG9ja19pcnEoJmRlc2MtPmxvY2spOwoK SSB3b3VsZCB1c2UgdGhlIGlycXNhdmUvaXJxcmVzdG9yZSB2YXJpYW50cyBoZXJlIGZvciBleHRy YSBzYWZldHkuCgpUaGFua3MsIFJvZ2VyLgoKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX18KWGVuLWRldmVsIG1haWxpbmcgbGlzdApYZW4tZGV2ZWxAbGlzdHMu eGVucHJvamVjdC5vcmcKaHR0cHM6Ly9saXN0cy54ZW5wcm9qZWN0Lm9yZy9tYWlsbWFuL2xpc3Rp bmZvL3hlbi1kZXZlbA==