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Tsirkin" To: Jason Wang Subject: Re: [PATCH v4] virtio_net: suppress cpu stall when free_unused_bufs Message-ID: <20230507093328-mutt-send-email-mst@kernel.org> References: <1683167226-7012-1-git-send-email-wangwenliang.1995@bytedance.com> MIME-Version: 1.0 In-Reply-To: X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Disposition: inline Cc: xuanzhuo@linux.alibaba.com, willemdebruijn.kernel@gmail.com, Wenliang Wang , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, zhengqi.arch@bytedance.com, virtualization@lists.linux-foundation.org, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, davem@davemloft.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" T24gRnJpLCBNYXkgMDUsIDIwMjMgYXQgMTE6Mjg6MjVBTSArMDgwMCwgSmFzb24gV2FuZyB3cm90 ZToKPiBPbiBUaHUsIE1heSA0LCAyMDIzIGF0IDEwOjI34oCvQU0gV2VubGlhbmcgV2FuZwo+IDx3 YW5nd2VubGlhbmcuMTk5NUBieXRlZGFuY2UuY29tPiB3cm90ZToKPiA+Cj4gPiBGb3IgbXVsdGkt cXVldWUgYW5kIGxhcmdlIHJpbmctc2l6ZSB1c2UgY2FzZSwgdGhlIGZvbGxvd2luZyBlcnJvcgo+ ID4gb2NjdXJyZWQgd2hlbiBmcmVlX3VudXNlZF9idWZzOgo+ID4gcmN1OiBJTkZPOiByY3Vfc2No ZWQgc2VsZi1kZXRlY3RlZCBzdGFsbCBvbiBDUFUuCj4gPgo+ID4gRml4ZXM6IDk4NmE0ZjRkNDUy ZCAoInZpcnRpb19uZXQ6IG11bHRpcXVldWUgc3VwcG9ydCIpCj4gPiBTaWduZWQtb2ZmLWJ5OiBX ZW5saWFuZyBXYW5nIDx3YW5nd2VubGlhbmcuMTk5NUBieXRlZGFuY2UuY29tPgo+ID4gLS0tCj4g PiB2MjoKPiA+IC1hZGQgbmVlZF9yZXNjaGVkIGNoZWNrLgo+ID4gLWFwcGx5IHNhbWUgbG9naWMg dG8gc3EuCj4gPiB2MzoKPiA+IC11c2UgY29uZF9yZXNjaGVkIGluc3RlYWQuCj4gPiB2NDoKPiA+ IC1hZGQgZml4ZXMgdGFnCj4gPiAtLS0KPiA+ICBkcml2ZXJzL25ldC92aXJ0aW9fbmV0LmMgfCAy ICsrCj4gPiAgMSBmaWxlIGNoYW5nZWQsIDIgaW5zZXJ0aW9ucygrKQo+ID4KPiA+IGRpZmYgLS1n aXQgYS9kcml2ZXJzL25ldC92aXJ0aW9fbmV0LmMgYi9kcml2ZXJzL25ldC92aXJ0aW9fbmV0LmMK PiA+IGluZGV4IDhkODAzODUzOGZjNC4uYTEyYWUyNmRiMGUyIDEwMDY0NAo+ID4gLS0tIGEvZHJp dmVycy9uZXQvdmlydGlvX25ldC5jCj4gPiArKysgYi9kcml2ZXJzL25ldC92aXJ0aW9fbmV0LmMK PiA+IEBAIC0zNTYwLDEyICszNTYwLDE0IEBAIHN0YXRpYyB2b2lkIGZyZWVfdW51c2VkX2J1ZnMo c3RydWN0IHZpcnRuZXRfaW5mbyAqdmkpCj4gPiAgICAgICAgICAgICAgICAgc3RydWN0IHZpcnRx dWV1ZSAqdnEgPSB2aS0+c3FbaV0udnE7Cj4gPiAgICAgICAgICAgICAgICAgd2hpbGUgKChidWYg PSB2aXJ0cXVldWVfZGV0YWNoX3VudXNlZF9idWYodnEpKSAhPSBOVUxMKQo+ID4gICAgICAgICAg ICAgICAgICAgICAgICAgdmlydG5ldF9zcV9mcmVlX3VudXNlZF9idWYodnEsIGJ1Zik7Cj4gPiAr ICAgICAgICAgICAgICAgY29uZF9yZXNjaGVkKCk7Cj4gCj4gRG9lcyB0aGlzIHJlYWxseSBhZGRy ZXNzIHRoZSBjYXNlIHdoZW4gdGhlIHZpcnRxdWV1ZSBpcyB2ZXJ5IGxhcmdlPwo+IAo+IFRoYW5r cwoKCml0IGRvZXMgaW4gdGhhdCBhIHZlcnkgbGFyZ2UgcXVldWUgaXMgc3RpbGwganVzdCA2NGsg aW4gc2l6ZS4Kd2UgbWlnaHQgaG93ZXZlciBoYXZlIDY0ayBvZiB0aGVzZSBxdWV1ZXMuCgo+ID4g ICAgICAgICB9Cj4gPgo+ID4gICAgICAgICBmb3IgKGkgPSAwOyBpIDwgdmktPm1heF9xdWV1ZV9w YWlyczsgaSsrKSB7Cj4gPiAgICAgICAgICAgICAgICAgc3RydWN0IHZpcnRxdWV1ZSAqdnEgPSB2 aS0+cnFbaV0udnE7Cj4gPiAgICAgICAgICAgICAgICAgd2hpbGUgKChidWYgPSB2aXJ0cXVldWVf ZGV0YWNoX3VudXNlZF9idWYodnEpKSAhPSBOVUxMKQo+ID4gICAgICAgICAgICAgICAgICAgICAg ICAgdmlydG5ldF9ycV9mcmVlX3VudXNlZF9idWYodnEsIGJ1Zik7Cj4gPiArICAgICAgICAgICAg ICAgY29uZF9yZXNjaGVkKCk7Cj4gPiAgICAgICAgIH0KPiA+ICB9Cj4gPgo+ID4gLS0KPiA+IDIu MjAuMQo+ID4KCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f ClZpcnR1YWxpemF0aW9uIG1haWxpbmcgbGlzdApWaXJ0dWFsaXphdGlvbkBsaXN0cy5saW51eC1m b3VuZGF0aW9uLm9yZwpodHRwczovL2xpc3RzLmxpbnV4Zm91bmRhdGlvbi5vcmcvbWFpbG1hbi9s aXN0aW5mby92aXJ0dWFsaXphdGlvbg==