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bh=YKXcX1Zdg1COG+JHgP7kxCkfawMp8ssx2TcF3Bvm0fI=; b=TTwroaamE2V/V7AqPCfK5KlBszS5iOb37Dk+/jhbbEf5U0a7coi4awOVa4g1Xp127gkhny jrYAOytxgcmThliTRUIhVfRph9aS/j2bhux9QPPYrKn8d5L3+nN+I1cZleQca3FR3OqfOI JJ65iNFwm1VjFwr2e6y2Hip4nYj6Oio= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-294-MQnK_CGjM6qCMDUK3oEmaQ-1; Fri, 09 Oct 2020 00:05:41 -0400 X-MC-Unique: MQnK_CGjM6qCMDUK3oEmaQ-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 06F5280B70A; Fri, 9 Oct 2020 04:05:40 +0000 (UTC) Received: from [10.72.13.133] (ovpn-13-133.pek2.redhat.com [10.72.13.133]) by smtp.corp.redhat.com (Postfix) with ESMTP id 8BB42100164C; Fri, 9 Oct 2020 04:05:20 +0000 (UTC) Subject: Re: [PATCH v2] vringh: fix __vringh_iov() when riov and wiov are different To: Stefano Garzarella , mst@redhat.com References: <20201008204256.162292-1-sgarzare@redhat.com> From: Jason Wang Message-ID: <8d84abcb-2f2e-8f24-039f-447e8686b878@redhat.com> Date: Fri, 9 Oct 2020 12:05:15 +0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <20201008204256.162292-1-sgarzare@redhat.com> Content-Language: en-US X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 Cc: kvm@vger.kernel.org, netdev@vger.kernel.org, Rusty Russell , linux-kernel@vger.kernel.org, stable@vger.kernel.org, virtualization@lists.linux-foundation.org X-BeenThere: virtualization@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Linux virtualization List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: base64 Content-Type: text/plain; charset="utf-8"; Format="flowed" Errors-To: virtualization-bounces@lists.linux-foundation.org Sender: "Virtualization" Ck9uIDIwMjAvMTAvOSDkuIrljYg0OjQyLCBTdGVmYW5vIEdhcnphcmVsbGEgd3JvdGU6Cj4gSWYg cmlvdiBhbmQgd2lvdiBhcmUgYm90aCBkZWZpbmVkIGFuZCB0aGV5IHBvaW50IHRvIGRpZmZlcmVu dAo+IG9iamVjdHMsIG9ubHkgcmlvdiBpcyBpbml0aWFsaXplZC4gSWYgdGhlIHdpb3YgaXMgbm90 IGluaXRpYWxpemVkCj4gYnkgdGhlIGNhbGxlciwgdGhlIGZ1bmN0aW9uIGZhaWxzIHJldHVybmlu ZyAtRUlOVkFMIGFuZCBwcmludGluZwo+ICJSZWFkYWJsZSBkZXNjIDB4Li4uIGFmdGVyIHdyaXRh YmxlIiBlcnJvciBtZXNzYWdlLgo+Cj4gVGhpcyBpc3N1ZSBoYXBwZW5zIHdoZW4gZGVzY3JpcHRv cnMgaGF2ZSBib3RoIHJlYWRhYmxlIGFuZCB3cml0YWJsZQo+IGJ1ZmZlcnMgKGVnLiB2aXJ0aW8t YmxrIGRldmljZXMgaGFzIHZpcnRpb19ibGtfb3V0aGRyIGluIHRoZSByZWFkYWJsZQo+IGJ1ZmZl ciBhbmQgc3RhdHVzIGFzIGxhc3QgYnl0ZSBvZiB3cml0YWJsZSBidWZmZXIpIGFuZCB3ZSBjYWxs Cj4gX192cmluZ2hfaW92KCkgdG8gZ2V0IGJvdGggdHlwZSBvZiBidWZmZXJzIGluIHR3byBkaWZm ZXJlbnQgaW92ZWNzLgo+Cj4gTGV0J3MgcmVwbGFjZSB0aGUgJ2Vsc2UgaWYnIGNsYXVzZSB3aXRo ICdpZicgdG8gaW5pdGlhbGl6ZSBib3RoCj4gcmlvdiBhbmQgd2lvdiBpZiB0aGV5IGFyZSBub3Qg TlVMTC4KPgo+IEFzIGNoZWNrcGF0Y2ggcG9pbnRlZCBvdXQsIHdlIGFsc28gYXZvaWQgY3Jhc2hp bmcgdGhlIGtlcm5lbAo+IHdoZW4gcmlvdiBhbmQgd2lvdiBhcmUgYm90aCBOVUxMLCByZXBsYWNp bmcgQlVHKCkgd2l0aCBXQVJOX09OKCkKPiBhbmQgcmV0dXJuaW5nIC1FSU5WQUwuCgoKSXQgbG9v a3MgbGlrZSBJIG1ldCB0aGUgZXhhY3Qgc2ltaWxhciBpc3N1ZSB3aGVuIGRldmVsb3BpbmcgY3Ry bCB2cSAKc3VwcG9ydCAod2hpY2ggcmVxdWlyZXMgYm90aCBSRUFEIGFuZCBXUklURSBkZXNjcmlw dG9yKS4KCldoaWxlIEkgd2FzIHRyeWluZyB0byBmaXggdGhlIGlzc3VlIEkgZm91bmQgdGhlIGZv bGxvd2luZyBjb21tZW50OgoKIMKgKiBOb3RlIHRoYXQgeW91IG1heSBuZWVkIHRvIGNsZWFuIHVw IHJpb3YgYW5kIHdpb3YsIGV2ZW4gb24gZXJyb3IhCiDCoCovCmludCB2cmluZ2hfZ2V0ZGVzY19p b3RsYihzdHJ1Y3QgdnJpbmdoICp2cmgsCgpJIHNhdyBzb21lIGRyaXZlciBjYWxsIHZyaW5naF9r aW92X2NsZWFudXAoKS4KClNvIEkganVzdCBmb2xsb3cgdG8gdXNlIHRoYXQuCgpJJ20gbm90IHF1 aXRlIHN1cmUgd2hpY2ggb25lIGlzIGJldHRlci4KClRoYW5rcwoKCj4KPiBGaXhlczogZjg3ZDBm YmI1Nzk4ICgidnJpbmdoOiBob3N0LXNpZGUgaW1wbGVtZW50YXRpb24gb2YgdmlydGlvIHJpbmdz LiIpCj4gQ2M6IHN0YWJsZUB2Z2VyLmtlcm5lbC5vcmcKPiBTaWduZWQtb2ZmLWJ5OiBTdGVmYW5v IEdhcnphcmVsbGEgPHNnYXJ6YXJlQHJlZGhhdC5jb20+Cj4gLS0tCj4gICBkcml2ZXJzL3Zob3N0 L3ZyaW5naC5jIHwgOSArKysrKy0tLS0KPiAgIDEgZmlsZSBjaGFuZ2VkLCA1IGluc2VydGlvbnMo KyksIDQgZGVsZXRpb25zKC0pCj4KPiBkaWZmIC0tZ2l0IGEvZHJpdmVycy92aG9zdC92cmluZ2gu YyBiL2RyaXZlcnMvdmhvc3QvdnJpbmdoLmMKPiBpbmRleCBlMDU5YTlhNDdjZGYuLjhiZDhiNDAz ZjA4NyAxMDA2NDQKPiAtLS0gYS9kcml2ZXJzL3Zob3N0L3ZyaW5naC5jCj4gKysrIGIvZHJpdmVy cy92aG9zdC92cmluZ2guYwo+IEBAIC0yODQsMTMgKzI4NCwxNCBAQCBfX3ZyaW5naF9pb3Yoc3Ry dWN0IHZyaW5naCAqdnJoLCB1MTYgaSwKPiAgIAlkZXNjX21heCA9IHZyaC0+dnJpbmcubnVtOwo+ ICAgCXVwX25leHQgPSAtMTsKPiAgIAo+ICsJLyogWW91IG11c3Qgd2FudCBzb21ldGhpbmchICov Cj4gKwlpZiAoV0FSTl9PTighcmlvdiAmJiAhd2lvdikpCj4gKwkJcmV0dXJuIC1FSU5WQUw7Cj4g Kwo+ICAgCWlmIChyaW92KQo+ICAgCQlyaW92LT5pID0gcmlvdi0+dXNlZCA9IDA7Cj4gLQllbHNl IGlmICh3aW92KQo+ICsJaWYgKHdpb3YpCj4gICAJCXdpb3YtPmkgPSB3aW92LT51c2VkID0gMDsK PiAtCWVsc2UKPiAtCQkvKiBZb3UgbXVzdCB3YW50IHNvbWV0aGluZyEgKi8KPiAtCQlCVUcoKTsK PiAgIAo+ICAgCWZvciAoOzspIHsKPiAgIAkJdm9pZCAqYWRkcjsKCl9fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fClZpcnR1YWxpemF0aW9uIG1haWxpbmcgbGlz dApWaXJ0dWFsaXphdGlvbkBsaXN0cy5saW51eC1mb3VuZGF0aW9uLm9yZwpodHRwczovL2xpc3Rz LmxpbnV4Zm91bmRhdGlvbi5vcmcvbWFpbG1hbi9saXN0aW5mby92aXJ0dWFsaXphdGlvbg==