From mboxrd@z Thu Jan  1 00:00:00 1970
From: Tiwei Bie <tiwei.bie@intel.com>
Subject: Re: [RFC v3 4/5] virtio_ring: add event idx support in packed ring
Date: Thu, 3 May 2018 21:54:30 +0800
Message-ID: <20180503135430.lbtvn4p4lyu3ksqo__24019.8037274697$1525355517$gmane$org@debian>
References: <20180425051550.24342-5-tiwei.bie@intel.com>
	<34781052-df9f-e505-cd3f-08e460b34dcc@redhat.com>
	<20180502072819.mf5l3dypk6dwx2s7@debian>
	<20180502164828-mutt-send-email-mst@kernel.org>
	<20180502151255.h3x6rhszxa3euinl@debian>
	<20180502184015-mutt-send-email-mst@kernel.org>
	<20180503011116.qvoyblcpklinrk26@debian>
	<20180503044218-mutt-send-email-mst@kernel.org>
	<20180503020949.5u3qz32gsk33z6vk@debian>
	<9f0b4e37-63ff-42f9-f2e6-3747a19a0206@redhat.com>
Mime-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: base64
Return-path: <virtualization-bounces@lists.linux-foundation.org>
Content-Disposition: inline
In-Reply-To: <9f0b4e37-63ff-42f9-f2e6-3747a19a0206@redhat.com>
List-Unsubscribe: <https://lists.linuxfoundation.org/mailman/options/virtualization>,
	<mailto:virtualization-request@lists.linux-foundation.org?subject=unsubscribe>
List-Archive: <http://lists.linuxfoundation.org/pipermail/virtualization/>
List-Post: <mailto:virtualization@lists.linux-foundation.org>
List-Help: <mailto:virtualization-request@lists.linux-foundation.org?subject=help>
List-Subscribe: <https://lists.linuxfoundation.org/mailman/listinfo/virtualization>,
	<mailto:virtualization-request@lists.linux-foundation.org?subject=subscribe>
Sender: virtualization-bounces@lists.linux-foundation.org
Errors-To: virtualization-bounces@lists.linux-foundation.org
To: Jason Wang <jasowang@redhat.com>
Cc: "Michael S. Tsirkin" <mst@redhat.com>, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, virtualization@lists.linux-foundation.org, wexu@redhat.com
List-Id: virtualization@lists.linuxfoundation.org

T24gVGh1LCBNYXkgMDMsIDIwMTggYXQgMDM6MjU6MjlQTSArMDgwMCwgSmFzb24gV2FuZyB3cm90
ZToKPiBPbiAyMDE45bm0MDXmnIgwM+aXpSAxMDowOSwgVGl3ZWkgQmllIHdyb3RlOgo+ID4gPiA+
ID4gU28gaG93IGFib3V0IHdlIHVzZSB0aGUgc3RyYWlnaHRmb3J3YXJkIHdheSB0aGVuPwo+ID4g
PiA+IFlvdSBtZWFuIHdlIGRvIG5ldyArPSB2cS0+dnJpbmdfcGFja2VkLm51bSBpbnN0ZWFkCj4g
PiA+ID4gb2YgZXZlbnRfaWR4IC09IHZxLT52cmluZ19wYWNrZWQubnVtIGJlZm9yZSBjYWxsaW5n
Cj4gPiA+ID4gdnJpbmdfbmVlZF9ldmVudCgpPwo+ID4gPiA+IAo+ID4gPiA+IFRoZSBwcm9ibGVt
IGlzIHRoYXQsIHRoZSBzZWNvbmQgcGFyYW0gKG5ld19pZHgpIG9mCj4gPiA+ID4gdnJpbmdfbmVl
ZF9ldmVudCgpIHdpbGwgYmUgdXNlZCBmb3I6Cj4gPiA+ID4gCj4gPiA+ID4gKF9fdTE2KShuZXdf
aWR4IC0gZXZlbnRfaWR4IC0gMSkKPiA+ID4gPiAoX191MTYpKG5ld19pZHggLSBvbGQpCj4gPiA+
ID4gCj4gPiA+ID4gU28gaWYgd2UgY2hhbmdlIG5ldywgd2Ugd2lsbCBuZWVkIHRvIGNoYW5nZSBv
bGQgdG9vLgo+ID4gPiBJIHRoaW5rIHRoYXQgc2luY2Ugd2UgaGF2ZSBhIGJyYW5jaCB0aGVyZSBh
bnl3YXksCj4gPiA+IHdlIGFyZSBiZXR0ZXIgb2ZmIGp1c3Qgc3BlY2lhbC1jYXNpbmcgaWYgKHdy
YXBfY291bnRlciAhPSB2cS0+d3JhcF9jb3VudGVyKS4KPiA+ID4gVHJlYXQgaXMgZGlmZmVyZW50
eSBhbmQgYXZvaWQgY2FzdHMuCj4gPiA+IAo+ID4gPiA+IEFuZCB0aGF0IHdvdWxkIGJlIGFuIHVn
bHkgaGFjay4uCj4gPiA+ID4gCj4gPiA+ID4gQmVzdCByZWdhcmRzLAo+ID4gPiA+IFRpd2VpIEJp
ZQo+ID4gPiBJIGNvbnNpZGVyIGNhc3RzIGFuZCBodWdlIG51bWJlcnMgd2l0aCB0d28ncyBjb21w
bGVtZW50Cj4gPiA+IGdhbWVzIGV2ZW4gdWdsaWVyLgo+ID4gVGhlIGRlcGVuZGVuY3kgb24gdHdv
J3MgY29tcGxlbWVudCBnYW1lIGlzIGludHJvZHVjZWQKPiA+IHNpbmNlIHRoZSBzcGxpdCByaW5n
Lgo+ID4gCj4gPiBJbiBwYWNrZWQgcmluZywgb2xkIGlzIGNhbGN1bGF0ZWQgdmlhOgo+ID4gCj4g
PiBvbGQgPSB2cS0+bmV4dF9hdmFpbF9pZHggLSB2cS0+bnVtX2FkZGVkOwo+ID4gCj4gPiBJbiBz
cGxpdCByaW5nLCBvbGQgaXMgY2FsY3VsYXRlZCB2aWE6Cj4gPiAKPiA+IG9sZCA9IHZxLT5hdmFp
bF9pZHhfc2hhZG93IC0gdnEtPm51bV9hZGRlZDsKPiA+IAo+ID4gSW4gYm90aCBjYXNlcywgd2hl
biB2cS0+bnVtX2FkZGVkIGlzIGJpZ2dlciwgb2xkIHdpbGwKPiA+IGJlIGEgYmlnIG51bWJlci4K
PiA+IAo+ID4gQmVzdCByZWdhcmRzLAo+ID4gVGl3ZWkgQmllCj4gPiAKPiAKPiBIb3cgYWJvdXQg
anVzdCBkbyBzb21ldGhpbmcgbGlrZSB2aG9zdDoKPiAKPiBzdGF0aWMgdTE2IHZob3N0X2lkeF9k
aWZmKHN0cnVjdCB2aG9zdF92aXJ0cXVldWUgKnZxLCB1MTYgb2xkLCB1MTYgbmV3KQo+IHsKPiDC
oMKgwqAgaWYgKG5ldyA+IG9sZCkKPiDCoMKgwqAgwqDCoMKgIHJldHVybiBuZXcgLSBvbGQ7Cj4g
wqDCoMKgIHJldHVybsKgIChuZXcgKyB2cS0+bnVtIC0gb2xkKTsKPiB9Cj4gCj4gc3RhdGljIGJv
b2wgdmhvc3RfdnJpbmdfcGFja2VkX25lZWRfZXZlbnQoc3RydWN0IHZob3N0X3ZpcnRxdWV1ZSAq
dnEsCj4gwqDCoMKgIMKgwqDCoCDCoMKgwqAgwqDCoMKgIMKgwqDCoCDCoCBfX3UxNiBldmVudF9v
ZmYsIF9fdTE2IG5ldywKPiDCoMKgwqAgwqDCoMKgIMKgwqDCoCDCoMKgwqAgwqDCoMKgIMKgIF9f
dTE2IG9sZCkKPiB7Cj4gwqDCoMKgIHJldHVybiAoX191MTYpKHZob3N0X2lkeF9kaWZmKHZxLCBu
ZXcsIGV2ZW50X29mZikgLSAxKSA8Cj4gwqDCoMKgIMKgwqDCoMKgwqDCoCAoX191MTYpdmhvc3Rf
aWR4X2RpZmYodnEsIG5ldywgb2xkKTsKPiB9Cj4gCj4gPwoKSXQgc2VlbXMgdGhhdCB0aGVyZSBp
cyBhIHR5cG8gaW4gYWJvdmUgY29kZS4gVGhlIHNlY29uZApwYXJhbSBvZiB2aG9zdF9pZHhfZGlm
ZigpIGlzIGBvbGRgLCBidXQgd2hlbiBjYWxsaW5nIHRoaXMKZnVuY3Rpb24gaW4gdmhvc3RfdnJp
bmdfcGFja2VkX25lZWRfZXZlbnQoKSwgYG5ld2AgaXMKcGFzc2VkIGFzIHRoZSBzZWNvbmQgcGFy
YW0uCgpJZiB3ZSBhc3N1bWUgdGhlIHNlY29uZCBwYXJhbSBvZiB2aG9zdF9pZHhfZGlmZigpIGlz
IG5ldwphbmQgdGhlIHRoaXJkIG9uZSBpcyBvbGQsIGkuZS46CgpzdGF0aWMgdTE2IHZob3N0X2lk
eF9kaWZmKHN0cnVjdCB2aG9zdF92aXJ0cXVldWUgKnZxLCB1MTYgbmV3LCB1MTYgb2xkKQp7CsKg
wqDCoCBpZiAobmV3ID4gb2xkKQrCoMKgwqAgwqDCoMKgIHJldHVybiBuZXcgLSBvbGQ7CsKgwqDC
oCByZXR1cm7CoCAobmV3ICsgdnEtPm51bSAtIG9sZCk7Cn0KCkkgdGhpbmsgaXQncyBzdGlsbCBu
b3QgcmlnaHQuCgpCZWNhdXNlIGluIHZpcnRxdWV1ZV9lbmFibGVfY2JfZGVsYXllZCgpLCB3ZSBt
YXkgc2V0IGFuCmV2ZW50X29mZiB3aGljaCBpcyBiaWdnZXIgdGhhbiBuZXcgYW5kIGJvdGggb2Yg
dGhlbSBoYXZlCndyYXBwZWQuIEFuZCBpbiB0aGlzIGNhc2UsIGFsdGhvdWdoIG5ldyBpcyBzbWFs
bGVyIHRoYW4KZXZlbnRfb2ZmIChpLmUuIHRoZSB0aGlyZCBwYXJhbSAtLSBvbGQpLCBuZXcgc2hv
dWxkbid0CmFkZCB2cS0+bnVtLCBhbmQgYWN0dWFsbHkgd2UgYXJlIGV4cGVjdGluZyBhIHZlcnkg
YmlnCmlkeCBkaWZmLgoKQmVzdCByZWdhcmRzLApUaXdlaSBCaWUKX19fX19fX19fX19fX19fX19f
X19fX19fX19fX19fX19fX19fX19fX19fX19fX18KVmlydHVhbGl6YXRpb24gbWFpbGluZyBsaXN0
ClZpcnR1YWxpemF0aW9uQGxpc3RzLmxpbnV4LWZvdW5kYXRpb24ub3JnCmh0dHBzOi8vbGlzdHMu
bGludXhmb3VuZGF0aW9uLm9yZy9tYWlsbWFuL2xpc3RpbmZvL3ZpcnR1YWxpemF0aW9u