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d="scan'208";a="9942940" Date: Mon, 9 Dec 2019 12:41:37 +0100 From: Roger Pau =?iso-8859-1?Q?Monn=E9?= To: Paul Durrant Message-ID: <20191209114137.GT980@Air-de-Roger> References: <20191205140123.3817-1-pdurrant@amazon.com> <20191205140123.3817-4-pdurrant@amazon.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20191205140123.3817-4-pdurrant@amazon.com> User-Agent: Mutt/1.12.2 (2019-09-21) X-ClientProxiedBy: AMSPEX02CAS02.citrite.net (10.69.22.113) To AMSPEX02CL03.citrite.net (10.69.22.127) Subject: Re: [Xen-devel] [PATCH 3/4] xen/interface: don't discard pending work in FRONT/BACK_RING_ATTACH 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: Juergen Gross , xen-devel@lists.xenproject.org, Boris Ostrovsky , Stefano Stabellini , linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" T24gVGh1LCBEZWMgMDUsIDIwMTkgYXQgMDI6MDE6MjJQTSArMDAwMCwgUGF1bCBEdXJyYW50IHdy b3RlOgo+IEN1cnJlbnRseSB0aGVzZSBtYWNyb3Mgd2lsbCBza2lwIG92ZXIgYW55IHJlcXVlc3Rz L3Jlc3BvbnNlcyB0aGF0IGFyZQo+IGFkZGVkIHRvIHRoZSBzaGFyZWQgcmluZyB3aGlsc3QgaXQg aXMgZGV0YWNoZWQuIFRoaXMsIGluIGdlbmVyYWwsIGlzIG5vdAo+IGEgZGVzaXJhYmxlIHNlbWFu dGljIHNpbmNlIG1vc3QgZnJvbnRlbmQgaW1wbGVtZW50YXRpb25zIHdpbGwgZXZlbnR1YWxseQo+ IGJsb2NrIHdhaXRpbmcgZm9yIGEgcmVzcG9uc2Ugd2hpY2ggd291bGQgZWl0aGVyIG5ldmVyIGFw cGVhciBvciBuZXZlciBiZQo+IHByb2Nlc3NlZC4KPiAKPiBOT1RFOiBUaGVzZSBtYWNyb3MgYXJl IGN1cnJlbnRseSB1bnVzZWQuIEJBQ0tfUklOR19BVFRBQ0goKSwgaG93ZXZlciwgd2lsbAo+ICAg ICAgIGJlIHVzZWQgaW4gYSBzdWJzZXF1ZW50IHBhdGNoLgo+IAo+IFNpZ25lZC1vZmYtYnk6IFBh dWwgRHVycmFudCA8cGR1cnJhbnRAYW1hem9uLmNvbT4KClRob3NlIGhlYWRlcnMgY29tZSBmcm9t IFhlbiwgYW5kIHNob3VsZCBiZSBtb2RpZmllZCBpbiBYZW4gZmlyc3QgYW5kCnRoZW4gaW1wb3J0 ZWQgaW50byBMaW51eCBJTU8uCgpUaGFua3MsIFJvZ2VyLgoKX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX18KWGVuLWRldmVsIG1haWxpbmcgbGlzdApYZW4tZGV2 ZWxAbGlzdHMueGVucHJvamVjdC5vcmcKaHR0cHM6Ly9saXN0cy54ZW5wcm9qZWN0Lm9yZy9tYWls bWFuL2xpc3RpbmZvL3hlbi1kZXZlbA== 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=-5.0 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE, SPF_PASS,USER_AGENT_SANE_1 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 62ED7C00454 for ; 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Authentication-Results: esa4.hc3370-68.iphmx.com; dkim=none (message not signed) header.i=none; spf=None smtp.pra=roger.pau@citrix.com; spf=Pass smtp.mailfrom=roger.pau@citrix.com; spf=None smtp.helo=postmaster@mail.citrix.com Received-SPF: None (esa4.hc3370-68.iphmx.com: no sender authenticity information available from domain of roger.pau@citrix.com) identity=pra; client-ip=162.221.158.21; receiver=esa4.hc3370-68.iphmx.com; envelope-from="roger.pau@citrix.com"; x-sender="roger.pau@citrix.com"; x-conformance=sidf_compatible Received-SPF: Pass (esa4.hc3370-68.iphmx.com: domain of roger.pau@citrix.com designates 162.221.158.21 as permitted sender) identity=mailfrom; client-ip=162.221.158.21; receiver=esa4.hc3370-68.iphmx.com; envelope-from="roger.pau@citrix.com"; x-sender="roger.pau@citrix.com"; x-conformance=sidf_compatible; x-record-type="v=spf1"; x-record-text="v=spf1 ip4:209.167.231.154 ip4:178.63.86.133 ip4:195.66.111.40/30 ip4:85.115.9.32/28 ip4:199.102.83.4 ip4:192.28.146.160 ip4:192.28.146.107 ip4:216.52.6.88 ip4:216.52.6.188 ip4:162.221.158.21 ip4:162.221.156.83 ip4:168.245.78.127 ~all" Received-SPF: None (esa4.hc3370-68.iphmx.com: no sender authenticity information available from domain of postmaster@mail.citrix.com) identity=helo; client-ip=162.221.158.21; receiver=esa4.hc3370-68.iphmx.com; envelope-from="roger.pau@citrix.com"; x-sender="postmaster@mail.citrix.com"; x-conformance=sidf_compatible IronPort-SDR: Hm12VYnR78F0yIU6Vs5dDAXWyjZEnEngE4KcbEt+L9rMgOvnWLd9+lZvEAq3ooDyIwvLi/XKa8 NHYIajNI8lrLjnqqYpJGPOxKzg3kuRIYuYET1hXD3y71VNmvjd91/7lVtTXI9o15/AlYCWtohG wOO7Paq80UomTbrY2MnK10YJ+scaydS4VYK/J0gmBDWgY7Tez/L/2+qlOmRdeWbNXDbnbazIb3 LfsY0WlYE10LS3VoFXp7DLNL6rnJ0OC3MfKzR15mrHrqsQ0Y8/UIbNt1wZ7IxgApfXacaYd1oI S+k= X-SBRS: 2.7 X-MesageID: 9942940 X-Ironport-Server: esa4.hc3370-68.iphmx.com X-Remote-IP: 162.221.158.21 X-Policy: $RELAYED X-IronPort-AV: E=Sophos;i="5.69,294,1571716800"; d="scan'208";a="9942940" Date: Mon, 9 Dec 2019 12:41:37 +0100 From: Roger Pau =?iso-8859-1?Q?Monn=E9?= To: Paul Durrant CC: , , "Juergen Gross" , Stefano Stabellini , "Boris Ostrovsky" Subject: Re: [Xen-devel] [PATCH 3/4] xen/interface: don't discard pending work in FRONT/BACK_RING_ATTACH Message-ID: <20191209114137.GT980@Air-de-Roger> References: <20191205140123.3817-1-pdurrant@amazon.com> <20191205140123.3817-4-pdurrant@amazon.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: <20191205140123.3817-4-pdurrant@amazon.com> User-Agent: Mutt/1.12.2 (2019-09-21) X-ClientProxiedBy: AMSPEX02CAS02.citrite.net (10.69.22.113) To AMSPEX02CL03.citrite.net (10.69.22.127) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Dec 05, 2019 at 02:01:22PM +0000, Paul Durrant wrote: > Currently these macros will skip over any requests/responses that are > added to the shared ring whilst it is detached. This, in general, is not > a desirable semantic since most frontend implementations will eventually > block waiting for a response which would either never appear or never be > processed. > > NOTE: These macros are currently unused. BACK_RING_ATTACH(), however, will > be used in a subsequent patch. > > Signed-off-by: Paul Durrant Those headers come from Xen, and should be modified in Xen first and then imported into Linux IMO. Thanks, Roger.