From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from m16.mail.163.com (m16.mail.163.com [220.197.31.2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3C06222B8DF for ; Wed, 3 Jun 2026 01:59:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=220.197.31.2 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780451965; cv=none; b=f+AwJeWmHOYevZB+xIzlbpiCMxVFwOBNp90CgT0v1eapt5vsbc7ZRuPPFWRedOkEV366OXZ1jkTdunyj7jLNew7bZd71ECGnikPYTgzrYu8PdbUuFYeVJjLskOHszcGvX9N9itR2mnPOpZQIf0j04UTh67Med/0HFPl6cEZamdg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780451965; c=relaxed/simple; bh=vsgHEW9JEBiJqoehWt8+FZdLY6AQsMFp0DusW4rHEf8=; h=Date:From:To:Cc:Subject:In-Reply-To:References:Content-Type: MIME-Version:Message-ID; b=ce21QM74QDkx8ymVIguT2mN8M31BC77tRcd+RpLFzbiWi9g6O+BrbbhDfbAgI7yEh1MwAZbFigDTxLWk2IYZdw3WKno6PO3RBJajwZk608X0Td5nw5mSNC7LBThQZR8Ig3X7kGIvNzh/OXaefo/dPQfdpG7ELD4BzplrRxILS94= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=163.com; spf=pass smtp.mailfrom=163.com; dkim=pass (1024-bit key) header.d=163.com header.i=@163.com header.b=AJYl8nfj; arc=none smtp.client-ip=220.197.31.2 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=163.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=163.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=163.com header.i=@163.com header.b="AJYl8nfj" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=163.com; s=s110527; h=Date:From:To:Subject:Content-Type:MIME-Version: Message-ID; bh=vsgHEW9JEBiJqoehWt8+FZdLY6AQsMFp0DusW4rHEf8=; b=A JYl8nfj0AtZ1iJqIzxRCLc913DCoSXceLDsku0JJ0fBUXPCmkJnUWgrzRpDODNJI b1N6YXJnOJ9t600KvpkesPSkcFl13MFbhlm0GpxmrsKB7bDrqoohZLSq6WRHsvKs ab188KZq37c0PYES+huxVF6X0l0pt7Zje3i+aib2fI= Received: from yangjiale133$163.com ( [218.94.41.202] ) by ajax-webmail-wmsvr-40-107 (Coremail) ; Wed, 3 Jun 2026 09:58:56 +0800 (CST) Date: Wed, 3 Jun 2026 09:58:56 +0800 (CST) From: yangjiale133 To: "Eugenio Perez Martin" Cc: "Michael S . Tsirkin" , "Jason Wang" , "Xuan Zhuo" , "virtualization@lists.linux.dev" , "linux-kernel@vger.kernel.org" Subject: Re:Re: [PATCH] VIRTIO: Update the desc 'flag' fied last in packed ring. X-Priority: 3 X-Mailer: Coremail Webmail Server Version 2023.4-cmXT build 20260403(27802f6d) Copyright (c) 2002-2026 www.mailtech.cn 163com In-Reply-To: References: <20260602043123.10207-1-yangjiale133@163.com> X-NTES-SC: AL_Qu2TAvievkEo4CaZZOkcnE8Rjuw3XcW0vvsi3YRQc+AElg3y3hkNRFpSMVr62tK2BzuptSKIUxxf6uRFYaNo7WME1aLdhl9m8DiL3izvjw== Content-Transfer-Encoding: base64 Content-Type: text/plain; charset=UTF-8 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-ID: <46a9dc36.1986.19e8b34896c.Coremail.yangjiale133@163.com> X-Coremail-Locale: zh_CN X-CM-TRANSID:aygvCgC334lgih9qFiEBAA--.11663W X-CM-SenderInfo: p1dqwy5ldoviitt6il2tof0z/xtbC4gAdNmofimBIcwAA3t X-Coremail-Antispam: 1U5529EdanIXcx71UUUUU7vcSsGvfC2KfnxnUU== RnJvbSB0aGUgZGV2aWNlJ3MgcGVyc3BlY3RpdmUsIGR1cmluZyBhIHNpbmdsZSByZWFkIG9mIHRo ZSBkZXNjcmlwdG9yIApsaXN0LWFuZCB0aGF0IGxpc3Qgc3BhbnMgYWNyb3NzIGNhY2hlIGxpbmVz Lgp0aGUgcmV0cmlldmVkIGRhdGEgd2lsbCBzaG93IGBkZXNjW2hlYWRdLmZsYWdzYCBhcyB2YWxp ZCwgCmFuZCBgZGVzY1tpXS5mbGFnc2AgYXMgdmFsaWQgYXMgd2VsbDsgaG93ZXZlciwgCnRoZSBg ZGVzY1tpXS5hZGRyYCBhbmQgYGxlbmAgZmllbGRzIG1heSBiZSBpbnZhbGlkLgoKSSBzdXNwZWN0 IHRoaXMgb2NjdXJzIGJlY2F1c2UgYSBzaW5nbGUgRE1BIG9wZXJhdGlvbiBpcyBpbnRlcm5hbGx5 IApzcGxpdCBpbnRvIG11bHRpcGxlIHBhcmFsbGVsIHJlYWQgdHJhbnNhY3Rpb25zLCAKYWxpZ25l ZCB0byBjYWNoZSBsaW5lIGJvdW5kYXJpZXMuCgpJIGFwb2xvZ2l6ZSB0aGF0IEkgY3VycmVudGx5 IGxhY2sgdGhlIG5lY2Vzc2FyeSBlbnZpcm9ubWVudCB0byB2ZXJpZnkgCndoZXRoZXIgdGhpcyBt b2RpZmljYXRpb24gZGVmaW5pdGl2ZWx5IHJlc29sdmVzIHRoZSBpc3N1ZSBvciAKbWVyZWx5IHJl ZHVjZXMgdGhlIHByb2JhYmlsaXR5IG9mIGl0cyBvY2N1cnJlbmNlOyAKdGhlcmVmb3JlLCB0aGlz IHBhdGNoIGNhbiBiZSBkaXNjYXJkZWQuCgp5YW5namlhbGUKCgoKQXQgMjAyNi0wNi0wMiAxNDow NDoxMywgIkV1Z2VuaW8gUGVyZXogTWFydGluIiA8ZXBlcmV6bWFAcmVkaGF0LmNvbT4gd3JvdGU6 Cj5PbiBUdWUsIEp1biAyLCAyMDI2IGF0IDY6MzTigK9BTSB5YW5namlhbGUgPHlhbmdqaWFsZTEz M0AxNjMuY29tPiB3cm90ZToKPj4KPj4gV2hlbiBhIGRlc2NyaXB0b3IgbGlzdCBzcGFucyBhY3Jv c3MgY2FjaGUgbGluZXMsCj4+IHVwZGF0aW5nIHRoZSBmbGFnIGZpcnN0IGNhbiBsZWFkIHRvIGEg c2NlbmFyaW8gd2hlcmUgdGhlIGRldmljZSBzaWRlCj4+IHBlcmNlaXZlcyB0aGUgZmxhZyBhcyB2 YWxpZCwgeWV0IHRoZSBjb3JyZXNwb25kaW5nIGFkZHJlc3MgYW5kIGxlbmd0aAo+PiBmaWVsZHMg cmVtYWluIHVudXBkYXRlZOKAlHJlc3VsdGluZyBpbiBpbnZhbGlkIHZhbHVlcy4KPj4gVGhlcmVm b3JlLCB0aGUgZmxhZyBmaWVsZCBtdXN0IGJlIHVwZGF0ZWQgbGFzdC4KPj4KPj4gU2lnbmVkLW9m Zi1ieTogeWFuZ2ppYWxlIDx5YW5namlhbGUxMzNAMTYzLmNvbT4KPj4gLS0tCj4+ICBkcml2ZXJz L3ZpcnRpby92aXJ0aW9fcmluZy5jIHwgOCArKysrLS0tLQo+PiAgMSBmaWxlIGNoYW5nZWQsIDQg aW5zZXJ0aW9ucygrKSwgNCBkZWxldGlvbnMoLSkKPj4KPj4gZGlmZiAtLWdpdCBhL2RyaXZlcnMv dmlydGlvL3ZpcnRpb19yaW5nLmMgYi9kcml2ZXJzL3ZpcnRpby92aXJ0aW9fcmluZy5jCj4+IGlu ZGV4IGZiY2E3Y2UxYzZiZi4uMDM2YjRmOTBkMzBmIDEwMDY0NAo+PiAtLS0gYS9kcml2ZXJzL3Zp cnRpby92aXJ0aW9fcmluZy5jCj4+ICsrKyBiL2RyaXZlcnMvdmlydGlvL3ZpcnRpb19yaW5nLmMK Pj4gQEAgLTE2ODgsNiArMTY4OCwxMCBAQCBzdGF0aWMgaW5saW5lIGludCB2aXJ0cXVldWVfYWRk X3BhY2tlZChzdHJ1Y3QgdnJpbmdfdmlydHF1ZXVlICp2cSwKPj4gICAgICAgICAgICAgICAgICAg ICAgICAgICAgICAgICAgICAgICAgICAgICAgJmFkZHIsICZsZW4sIHByZW1hcHBlZCwgYXR0cikp Cj4+ICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgZ290byB1bm1hcF9yZWxlYXNlOwo+ Pgo+PiArICAgICAgICAgICAgICAgICAgICAgICBkZXNjW2ldLmFkZHIgPSBjcHVfdG9fbGU2NChh ZGRyKTsKPj4gKyAgICAgICAgICAgICAgICAgICAgICAgZGVzY1tpXS5sZW4gPSBjcHVfdG9fbGUz MihsZW4pOwo+PiArICAgICAgICAgICAgICAgICAgICAgICBkZXNjW2ldLmlkID0gY3B1X3RvX2xl MTYoaWQpOwo+PiArCj4+ICAgICAgICAgICAgICAgICAgICAgICAgIGZsYWdzID0gY3B1X3RvX2xl MTYodnEtPnBhY2tlZC5hdmFpbF91c2VkX2ZsYWdzIHwKPj4gICAgICAgICAgICAgICAgICAgICAg ICAgICAgICAgICAgICAgKCsrYyA9PSB0b3RhbF9zZyA/IDAgOiBWUklOR19ERVNDX0ZfTkVYVCkg fAo+PiAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAobiA8IG91dF9zZ3MgPyAw IDogVlJJTkdfREVTQ19GX1dSSVRFKSk7Cj4+IEBAIC0xNjk2LDEwICsxNzAwLDYgQEAgc3RhdGlj IGlubGluZSBpbnQgdmlydHF1ZXVlX2FkZF9wYWNrZWQoc3RydWN0IHZyaW5nX3ZpcnRxdWV1ZSAq dnEsCj4+ICAgICAgICAgICAgICAgICAgICAgICAgIGVsc2UKPj4gICAgICAgICAgICAgICAgICAg ICAgICAgICAgICAgICBkZXNjW2ldLmZsYWdzID0gZmxhZ3M7Cj4+Cj4+IC0gICAgICAgICAgICAg ICAgICAgICAgIGRlc2NbaV0uYWRkciA9IGNwdV90b19sZTY0KGFkZHIpOwo+PiAtICAgICAgICAg ICAgICAgICAgICAgICBkZXNjW2ldLmxlbiA9IGNwdV90b19sZTMyKGxlbik7Cj4+IC0gICAgICAg ICAgICAgICAgICAgICAgIGRlc2NbaV0uaWQgPSBjcHVfdG9fbGUxNihpZCk7Cj4+IC0KPj4gICAg ICAgICAgICAgICAgICAgICAgICAgaWYgKHVubGlrZWx5KHZxLT51c2VfbWFwX2FwaSkpIHsKPj4g ICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICB2cS0+cGFja2VkLmRlc2NfZXh0cmFbY3Vy cl0uYWRkciA9IHByZW1hcHBlZCA/Cj4+ICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAg ICAgICAgICBETUFfTUFQUElOR19FUlJPUiA6IGFkZHI7Cj4KPlRoZXNlIGZsYWdzIGFyZSB1cGRh dGVkIGJlZm9yZSB0aGUgZmxhZ3Mgb2YgdGhlIGhlYWQgZGVzY3JpcHRvciBhdCB0aGUKPmVuZCBv ZiB0aGUgZnVuY3Rpb24sIGF0ICJ2cS0+cGFja2VkLnZyaW5nLmRlc2NbaGVhZF0uZmxhZ3MgPQo+ aGVhZF9mbGFncyIsIHNvIHRoZSBkZXZpY2Ugc2hvdWxkIG5vdCBzZWUgdGhlc2UuIEJlY2F1c2Ug b2YgdGhhdCwgdGhlCj5yZWxhdGl2ZSBvcmRlciBiZXR3ZWVuIHRoZSByZXN0IG9mIHRoZSBmaWVs ZHMgb2YgdGhlIHNhbWUgZGVzY3JpcHRvcgo+b3Igb3RoZXIgZGVzY3JpcHRvcnMnIGZpZWxkcywg ZXhjZXB0IGZvciB0aGUgaGVhZCBkZXNjcmlwdG9yJ3MgZmxhZ3MsCj5zaG91bGQgbm90IG1hdHRl ci4gVGhlcmUgaXMgYSB3cml0ZSBtZW1vcnkgYmFycmllciBqdXN0IGJlZm9yZQo+dXBkYXRpbmcg dGhlIGhlYWQncyBmbGFncy4KPgo+QWxzbywgSSBkb24ndCBnZXQgd2h5IHRoZSBjYWNoZSBsaW5l IG1hdHRlcnMgaGVyZS4gQ2FuIHlvdSBleHBhbmQ/IEFtCj5JIG1pc3Npbmcgc29tZXRoaW5nPwo=