From mboxrd@z Thu Jan 1 00:00:00 1970 From: Boris Ostrovsky Subject: Re: [PATCH v2] xen-netfront: Fix Rx stall during network stress and OOM Date: Sun, 29 Jan 2017 18:09:21 -0500 Message-ID: <38ccfaea-0a65-a6f3-c19a-e6f9c0d4ef76@oracle.com> References: <1484771149-12699-1-git-send-email-vineethp@u480fcf3b67f557f68df1.ant.amazon.com> <66b10c64-936a-8001-6855-2ff1ed626642@amazon.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8"; Format="flowed" Content-Transfer-Encoding: base64 To: Vineeth Remanan Pillai , David Miller , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Wei Liu , Paul Durrant , xen-devel Return-path: In-Reply-To: <66b10c64-936a-8001-6855-2ff1ed626642@amazon.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xen.org Sender: "Xen-devel" List-Id: netdev.vger.kernel.org CgpPbiAwMS8xOS8yMDE3IDExOjM1IEFNLCBWaW5lZXRoIFJlbWFuYW4gUGlsbGFpIHdyb3RlOgo+ IEZyb206IFZpbmVldGggUmVtYW5hbiBQaWxsYWkgPHZpbmVldGhwQGFtYXpvbi5jb20+Cj4KPiBE dXJpbmcgYW4gT09NIHNjZW5hcmlvLCByZXF1ZXN0IHNsb3RzIGNvdWxkIG5vdCBiZSBjcmVhdGVk IGFzIHNrYgo+IGFsbG9jYXRpb24gZmFpbHMuIFNvIHRoZSBuZXRiYWNrIGNhbm5vdCBwYXNzIGlu IHBhY2tldHMgYW5kIG5ldGZyb250Cj4gd3JvbmdseSBhc3N1bWVzIHRoYXQgdGhlcmUgaXMgbm8g bW9yZSB3b3JrIHRvIGJlIGRvbmUgYW5kIGl0IGRpc2FibGVzCj4gcG9sbGluZy4gVGhpcyBjYXVz ZXMgUnggdG8gc3RhbGwuCj4KPiBUaGUgaXNzdWUgaXMgd2l0aCB0aGUgcmV0cnkgbG9naWMgd2hp Y2ggc2NoZWR1bGVzIHRoZSB0aW1lciBpZiB0aGUKPiBjcmVhdGVkIHNsb3RzIGFyZSBsZXNzIHRo YW4gTkVUX1JYX1NMT1RTX01JTi4gVGhlIGNvdW50IG9mIG5ldyByZXF1ZXN0Cj4gc2xvdHMgdG8g YmUgcHVzaGVkIGFyZSBjYWxjdWxhdGVkIGFzIGEgZGlmZmVyZW5jZSBiZXR3ZWVuIG5ldyByZXFf cHJvZAo+IGFuZCByc3BfY29ucyB3aGljaCBjb3VsZCBiZSBtb3JlIHRoYW4gdGhlIGFjdHVhbCBz bG90cywgaWYgdGhlcmUgYXJlCj4gdW5jb25zdW1lZCByZXNwb25zZXMuCj4KPiBUaGUgZml4IGlz IHRvIGNhbGN1bGF0ZSB0aGUgY291bnQgb2YgbmV3bHkgY3JlYXRlZCBzbG90cyBhcyB0aGUKPiBk aWZmZXJlbmNlIGJldHdlZW4gbmV3IHJlcV9wcm9kIGFuZCBvbGQgcmVxX3Byb2QuCj4KPiBTaWdu ZWQtb2ZmLWJ5OiBWaW5lZXRoIFJlbWFuYW4gUGlsbGFpIDx2aW5lZXRocEBhbWF6b24uY29tPgo+ IFJldmlld2VkLWJ5OiBKdWVyZ2VuIEdyb3NzIDxqZ3Jvc3NAc3VzZS5jb20+Cj4gLS0tCj4gQ2hh bmdlcyBpbiB2MjoKPiAgICAgLSBSZW1vdmVkIHRoZSBvbGQgaW1wbGVtZW50YXRpb24gb2YgZW5h YmxpbmcgcG9sbGluZyBvbgo+ICAgICAgIHNrYiBhbGxvY2F0aW9uIGVycm9yLgo+ICAgICAtIENv cnJlY3RlZCB0aGUgcmVmaWxsIHRpbWVyIGxvZ2ljIHRvIHNjaGVkdWxlIHdoZW4gbmV3bHkKPiAg ICAgICBjcmVhdGVkIHNsb3RzIHNpbmNlIGxhc3QgcHVzaCBpcyBsZXNzIHRoYW4gTkVUX1JYX1NM T1RTX01JTi4KCgpUaGVyZSBhcmUgY291cGxlIG9mIHByb2JsZW1zIHdpdGggdGhpcyBwYXRjaC4K MS4gVGhlICdpZicgY2xhdXNlIG5vdyBldmFsdWF0ZXMgdG8gdHJ1ZSBvbiBwcmV0dHkgbXVjaCBl dmVyeSBjYWxsIHRvIAp4ZW5uZXRfYWxsb2NfcnhfYnVmZmVycygpLgoyLiBJdCB0aWNrbGVzIGEg bGF0ZW50IGJ1ZyBkdXJpbmcgcmVzdW1lIHdoZXJlIHRoZSB0aW1lciB0cmlnZ2VycyBiZWZvcmUg CndlIHJlLWNvbm5lY3QuIFRoZSB0cm91YmxlIGlzIHRoYXQgd2Ugbm93IHRyeSB0byBkZXJlZmVy ZW5jZSAKcXVldWUtPnJ4LnNyaW5nIHdoaWNoIGlzIE5VTEwgc2luY2Ugd2UgZGlzY29ubmVjdCBp biBuZXRmcm9udF9yZXN1bWUoKS4gCihDdXJpb3VzbHksIEkgb25seSBvYnNlcnZlIGl0IHdpdGgg MzItYml0IGd1ZXN0cykKCkknbGwgc2VuZCBhIHBhdGNoIGxhdGVyIHRoYXQgd2lsbCBkZWxldGUg dGhlIHRpbWVyIHNpbmNlIGl0IGxvb2tzIGxpa2UgYSAKYnVnIHRvIG1lIGluIGFueSBjYXNlIGJ1 dCB0aGUgZmlyc3QgcHJvYmxlbSBzZWVtcyB0byBiZSBtb3JlIHNlcmlvdXMgCnRoYW4gdGhlIHBy b2JsZW0gdGhhdCB0aGlzIHBhdGNoIGFkZHJlc3Nlcy4KCi1ib3JpcwoKPgo+ICBkcml2ZXJzL25l dC94ZW4tbmV0ZnJvbnQuYyB8IDIgKy0KPiAgMSBmaWxlIGNoYW5nZWQsIDEgaW5zZXJ0aW9uKCsp LCAxIGRlbGV0aW9uKC0pCj4KPiBkaWZmIC0tZ2l0IGEvZHJpdmVycy9uZXQveGVuLW5ldGZyb250 LmMgYi9kcml2ZXJzL25ldC94ZW4tbmV0ZnJvbnQuYwo+IGluZGV4IDQwZjI2YjYuLjJjN2MyOWYg MTAwNjQ0Cj4gLS0tIGEvZHJpdmVycy9uZXQveGVuLW5ldGZyb250LmMKPiArKysgYi9kcml2ZXJz L25ldC94ZW4tbmV0ZnJvbnQuYwo+IEBAIC0zMjEsNyArMzIxLDcgQEAgc3RhdGljIHZvaWQgeGVu bmV0X2FsbG9jX3J4X2J1ZmZlcnMoc3RydWN0Cj4gbmV0ZnJvbnRfcXVldWUgKnF1ZXVlKQo+ICAg ICAgcXVldWUtPnJ4LnJlcV9wcm9kX3B2dCA9IHJlcV9wcm9kOwo+Cj4gICAgICAvKiBOb3QgZW5v dWdoIHJlcXVlc3RzPyBUcnkgYWdhaW4gbGF0ZXIuICovCj4gLSAgICBpZiAocmVxX3Byb2QgLSBx dWV1ZS0+cngucnNwX2NvbnMgPCBORVRfUlhfU0xPVFNfTUlOKSB7Cj4gKyAgICBpZiAocmVxX3By b2QgLSBxdWV1ZS0+cnguc3JpbmctPnJlcV9wcm9kIDwgTkVUX1JYX1NMT1RTX01JTikgewo+ICAg ICAgICAgIG1vZF90aW1lcigmcXVldWUtPnJ4X3JlZmlsbF90aW1lciwgamlmZmllcyArIChIWi8x MCkpOwo+ICAgICAgICAgIHJldHVybjsKPiAgICAgIH0KCl9fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fClhlbi1kZXZlbCBtYWlsaW5nIGxpc3QKWGVuLWRldmVs QGxpc3RzLnhlbi5vcmcKaHR0cHM6Ly9saXN0cy54ZW4ub3JnL3hlbi1kZXZlbAo=