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Tsirkin" To: Jason Wang Subject: Re: [External] Re: 9p regression (Was: [PATCH v2] virtio_ring: don't update event idx on get_buf) Message-ID: <20230329012038-mutt-send-email-mst@kernel.org> References: <20230325105633.58592-1-huangjie.albert@bytedance.com> MIME-Version: 1.0 In-Reply-To: X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Disposition: inline Cc: =?utf-8?B?6buE5p2w?= , Christian Schoenebeck , linux-kernel@vger.kernel.org, virtualization@lists.linux-foundation.org, Eric Van Hensbergen , Luis Chamberlain , v9fs-developer@lists.sourceforge.net 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-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: virtualization-bounces@lists.linux-foundation.org Sender: "Virtualization" T24gVHVlLCBNYXIgMjgsIDIwMjMgYXQgMTE6Mzk6NTlBTSArMDgwMCwgSmFzb24gV2FuZyB3cm90 ZToKPiBPbiBUdWUsIE1hciAyOCwgMjAyMyBhdCAxMTowOeKAr0FNIOm7hOadsCA8aHVhbmdqaWUu YWxiZXJ0QGJ5dGVkYW5jZS5jb20+IHdyb3RlOgo+ID4KPiA+IEphc29uIFdhbmcgPGphc293YW5n QHJlZGhhdC5jb20+IOS6jjIwMjPlubQz5pyIMjjml6XlkajkuowgMTA6NTnlhpnpgZPvvJoKPiA+ ID4KPiA+ID4gT24gVHVlLCBNYXIgMjgsIDIwMjMgYXQgMTA6MTPigK9BTSBEb21pbmlxdWUgTWFy dGluZXQKPiA+ID4gPGFzbWFkZXVzQGNvZGV3cmVjay5vcmc+IHdyb3RlOgo+ID4gPiA+Cj4gPiA+ ID4gSGkgTWljaGFlbCwgQWxiZXJ0LAo+ID4gPiA+Cj4gPiA+ID4gQWxiZXJ0IEh1YW5nIHdyb3Rl IG9uIFNhdCwgTWFyIDI1LCAyMDIzIGF0IDA2OjU2OjMzUE0gKzA4MDA6Cj4gPiA+ID4gPiBpbiB2 aXJ0aW9fbmV0LCBpZiB3ZSBkaXNhYmxlIHRoZSBuYXBpX3R4LCB3aGVuIHdlIHRyaWdlciBhIHR4 IGludGVycnVwdCwKPiA+ID4gPiA+IHRoZSB2cS0+ZXZlbnRfdHJpZ2dlcmVkIHdpbGwgYmUgc2V0 IHRvIHRydWUuIEl0IHdpbGwgbm8gbG9uZ2VyIGJlIHNldCB0bwo+ID4gPiA+ID4gZmFsc2UuIFVu bGVzcyB3ZSBleHBsaWNpdGx5IGNhbGwgdmlydHF1ZXVlX2VuYWJsZV9jYl9kZWxheWVkIG9yCj4g PiA+ID4gPiB2aXJ0cXVldWVfZW5hYmxlX2NiX3ByZXBhcmUuCj4gPiA+ID4KPiA+ID4gPiBUaGlz IHBhdGNoIChjb21taXRlZCBhcyAzNTM5NTc3MGY4MDMgKCJ2aXJ0aW9fcmluZzogZG9uJ3QgdXBk YXRlIGV2ZW50Cj4gPiA+ID4gaWR4IG9uIGdldF9idWYiKSBpbiBuZXh0LTIwMjMwMzI3IGFwcGFy ZW50bHkgYnJlYWtzIDlwLCBhcyByZXBvcnRlZCBieQo+ID4gPiA+IEx1aXMgaW4gaHR0cHM6Ly9s a21sLmtlcm5lbC5vcmcvci9aQ0krN1dnNU9jbFNsRThjQGJvbWJhZGlsLmluZnJhZGVhZC5vcmcK PiA+ID4gPgo+ID4gPiA+IEkndmUganVzdCBoaXQgaGFkIGEgbG9vayBhdCByZWNlbnQgcGF0Y2hl c1sxXSBhbmQgcmV2ZXJ0ZWQgdGhpcyB0byB0ZXN0Cj4gPiA+ID4gYW5kIEkgY2FuIG1vdW50IGFn YWluLCBzbyBJJ20gcHJldHR5IHN1cmUgdGhpcyBpcyB0aGUgY3VscHJpdCwgYnV0IEkKPiA+ID4g PiBkaWRuJ3QgbG9vayBhdCB0aGUgY29udGVudCBhdCBhbGwgeWV0IHNvIGNhbm5vdCBhZHZpc2Ug ZnVydGhlci4KPiA+ID4gPiBJdCBtaWdodCB2ZXJ5IHdlbGwgYmUgdGhhdCB3ZSBuZWVkIHNvbWUg ZXh0cmEgaGFuZGxpbmcgZm9yIDlwCj4gPiA+ID4gc3BlY2lmaWNhbGx5IHRoYXQgY2FuIGJlIGFk ZGVkIHNlcGFyYXRlbHkgaWYgcmVxdWlyZWQuCj4gPiA+ID4KPiA+ID4gPiBbMV0gZ2l0IGxvZyAw ZWM1N2NmYTcyMWZiZDM2YjRjNGMwZDljY2M1ZDc4YTc4ZjdmYTM1Li5IRUFEIGRyaXZlcnMvdmly dGlvLwo+ID4gPiA+Cj4gPiA+ID4KPiA+ID4gPiBUaGlzIGNhbiBiZSByZXByb2R1Y2VkIHdpdGgg YSBzaW1wbGUgbW91bnQsIHJ1biBxZW11IHdpdGggc29tZSAtdmlydGZzCj4gPiA+ID4gYXJndW1l bnQgYW5kIGBtb3VudCAtdCA5cCAtbyBkZWJ1Zz02NTUzNSB0YWcgbW91bnRwb2ludGAgd2lsbCBo YW5nIGFmdGVyCj4gPiA+ID4gdGhlc2UgbWVzc2FnZXM6Cj4gPiA+ID4gOXBuZXQ6IC0tIHA5X3Zp cnRpb19yZXF1ZXN0ICg4Myk6IDlwIGRlYnVnOiB2aXJ0aW8gcmVxdWVzdAo+ID4gPiA+IDlwbmV0 OiAtLSBwOV92aXJ0aW9fcmVxdWVzdCAoODMpOiB2aXJ0aW8gcmVxdWVzdCBraWNrZWQKPiA+ID4g Pgo+ID4gPiA+IFNvIEkgc3VzcGVjdCB3ZSdyZSBqdXN0IG5vdCBnZXR0aW5nIGEgY2FsbGJhY2su Cj4gPiA+Cj4gPiA+IEkgdGhpbmsgc28uIFRoZSBwYXRjaCBhc3N1bWVzIHRoZSBkcml2ZXIgd2ls bCBjYWxsCj4gPiA+IHZpcnRxdWV1ZV9kaXNhYmxlL2VuYWJsZV9jYigpIHdoaWNoIGlzIG5vdCB0 aGUgY2FzZSBvZiB0aGUgOXAgZHJpdmVyLgo+ID4gPgo+ID4gPiBTbyBhZnRlciB0aGUgZmlyc3Qg aW50ZXJydXB0LCBldmVudF90cmlnZ2VyZWQgd2lsbCBiZSBzZXQgdG8gdHJ1ZSBmb3JldmVyLgo+ ID4gPgo+ID4gPiBUaGFua3MKPiA+ID4KPiA+Cj4gPiBIaTogV2FuZwo+ID4KPiA+IFllcywgIFRo aXMgcGF0Y2ggYXNzdW1lcyB0aGF0IGFsbCB2aXJ0aW8tcmVsYXRlZCBkcml2ZXJzIHdpbGwgY2Fs bAo+ID4gdmlydHF1ZXVlX2Rpc2FibGUvZW5hYmxlX2NiKCkuCj4gPiBUaGFuayB5b3UgZm9yIHJh aXNpbmcgdGhpcyBpc3N1ZS4KPiA+Cj4gPiBJdCBzZWVtcyB0aGF0IG5hcGlfdHggaXMgb25seSBy ZWxhdGVkIHRvIHZpcnR1ZV9uZXQuIEknbSB0aGlua2luZyBpZgo+ID4gd2UgbmVlZCB0byByZWZh Y3Rvcgo+ID4gbmFwaV90eCBpbnN0ZWFkIG9mIGltcGxlbWVudGluZyBpdCBpbnNpZGUgdmlydGlv X3JpbmcuCj4gCj4gV2UgY2FuIGhlYXIgZnJvbSBvdGhlcnMuCj4gCj4gSSB0aGluayBpdCdzIGJl dHRlciBub3QgdG8gd29ya2Fyb3VuZCB2aXJ0aW9fcmluZyBpc3N1ZXMgaW4gYSBzcGVjaWZpYwo+ IGRyaXZlci4gSXQgbWlnaHQganVzdCBhZGQgbW9yZSBoYWNrcy4gV2Ugc2hvdWxkIGNvcnJlY3Rs eSBzZXQKPiBWUklOR19BVkFJTF9GX05PX0lOVEVSUlVQVCwKCkkgYW0gc3RpbGwgc3R1Y2sgdHJ5 aW5nIHRvIHVuZGVyc3RhbmQgd2h5IHdlIGRvbid0IHNldCBpdC4KSG93IGRvZXMgZXZlbnRfdHJp Z2dlcmVkIGVuZCB1cCBnZXR0aW5nIHNldCB3aXRob3V0CmV2ZW50IGluZGV4IHN1cHBvcnQ/CgpU aGFua3MhCgpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpW aXJ0dWFsaXphdGlvbiBtYWlsaW5nIGxpc3QKVmlydHVhbGl6YXRpb25AbGlzdHMubGludXgtZm91 bmRhdGlvbi5vcmcKaHR0cHM6Ly9saXN0cy5saW51eGZvdW5kYXRpb24ub3JnL21haWxtYW4vbGlz dGluZm8vdmlydHVhbGl6YXRpb24=