From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alexei Starovoitov Subject: Re: pegged softirq and NAPI race (?) Date: Tue, 18 Sep 2018 17:51:11 +0000 Message-ID: References: Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Cc: netdev , Jeff Kirsher , Alexander Duyck , "michael.chan@broadcom.com" , Kernel Team To: Eric Dumazet , Song Liu Return-path: Received: from mx0b-00082601.pphosted.com ([67.231.153.30]:53102 "EHLO mx0b-00082601.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730164AbeIRXY6 (ORCPT ); Tue, 18 Sep 2018 19:24:58 -0400 In-Reply-To: Content-Language: en-US Content-ID: <5B6269CA494FC341A1A09F0F00736931@namprd15.prod.outlook.com> Sender: netdev-owner@vger.kernel.org List-ID: T24gOS8xOC8xOCA2OjQ1IEFNLCBFcmljIER1bWF6ZXQgd3JvdGU6DQo+IE9uIFR1ZSwgU2VwIDE4 LCAyMDE4IGF0IDE6NDEgQU0gU29uZyBMaXUgPHNvbmdsaXVicmF2aW5nQGZiLmNvbT4gd3JvdGU6 DQo+Pg0KPj4gV2UgYXJlIGRlYnVnZ2luZyB0aGlzIGlzc3VlIHRoYXQgbmV0Y29uc29sZSBtZXNz YWdlIHRyaWdnZXJzIHBlZ2dlZCBzb2Z0aXJxDQo+PiAoa3NvZnRpcnFkIHRha2luZyAxMDAlIENQ VSBmb3IgbWFueSBzZWNvbmRzKS4gV2UgZm91bmQgdGhpcyBpc3N1ZSBpbg0KPj4gcHJvZHVjdGlv biB3aXRoIGJvdGggYm54dCBhbmQgaXhnYmUsIG9uIGEgNC4xMSBiYXNlZCBrZXJuZWwuIFRoaXMg aXMgZWFzaWx5DQo+PiByZXByb2R1Y2libGUgd2l0aCBpeGdiZSBvbiA0LjExLCBhbmQgbGF0ZXN0 IG5ldC9uZXQtbmV4dCAoc2VlIFsxXSBmb3IgbW9yZQ0KPj4gZGV0YWlsKS4NCj4+DQo+PiBBZnRl ciBkZWJ1Z2dpbmcgZm9yIHNvbWUgdGltZSwgd2UgZm91bmQgdGhhdCB0aGlzIGlzc3VlIGlzIGxp a2VseSByZWxhdGVkDQo+PiB0byAzOWU2YzgyMDhkN2IgKCJuZXQ6IHNvbHZlIGEgTkFQSSByYWNl IikuIEFmdGVyIHJldmVydGluZyB0aGlzIGNvbW1pdCwNCj4+IHRoZSBzdGVwcyBkZXNjcmliZWQg aW4gWzFdIGNhbm5vdCByZXByb2R1Y2UgdGhlIGlzc3VlIG9uIGl4Z2JlLiBSZXZlcnRpbmcNCj4+ IHRoaXMgY29tbWl0IGFsc28gcmVkdWNlcyB0aGUgY2hhbmNlcyB3ZSBoaXQgdGhlIGlzc3VlIHdp dGggYm54dCAoaXQgc3RpbGwNCj4+IGhhcHBlbnMgd2l0aCBhIGxvd2VyIHJhdGUpLg0KPj4NCj4+ IEkgdHJpZWQgdG8gZml4IHRoaXMgaXNzdWUgd2l0aCByZWxheGVkIHZhcmlhbnQgKG9yIG9sZGVy IHZlcnNpb24pIG9mDQo+PiBuYXBpX3NjaGVkdWxlX3ByZXAoKSBpbiBuZXRwb2xsLCBqdXN0IGxp a2UgdGhlIG9uZSBvbiBuYXBpX3dhdGNoZG9nKCkuDQo+PiBIb3dldmVyLCBteSB0ZXN0cyBkbyBu b3QgYWx3YXlzIGdvIGFzIGV4cGVjdGVkLg0KPj4NCj4+IFBsZWFzZSBzaGFyZSB5b3VyIGNvbW1l bnRzL3N1Z2dlc3Rpb25zIG9uIHdoaWNoIGRpcmVjdGlvbiBzaGFsbCB3ZSB0cnkNCj4+IHRvIGZp eCB0aGlzLg0KPj4NCj4+IFRoYW5rcyBpbiBhZHZhbmNlIQ0KPj4gU29uZw0KPj4NCj4+DQo+PiBb MV0gaHR0cHM6Ly91cmxkZWZlbnNlLnByb29mcG9pbnQuY29tL3YyL3VybD91PWh0dHBzLTNBX193 d3cuc3Bpbmljcy5uZXRfbGlzdHNfbmV0ZGV2X21zZzUyMjMyOC5odG1sJmQ9RHdJQmFRJmM9NVZE MFJUdE5sVGgzeWNkNDFiM01VdyZyPWk2V29iS3hiZUczc2x6SFNJT3hUVnRZSUp3N3FqQ0U2UzBz cERUS0wtSjQmbT1pU2FPYXBqMWt4amhHWUxnUXIwUWQ4bVFDelZkb2JtZ1QxTDRKd0Z2enhzJnM9 bENFaHJ6NndRSlVVYUpPa3hGbXRPc3pBZ2tmM0poNHJlWF9pMUdiSTVSSSZlPQ0KPg0KPiBZb3Ug aGF2ZSBub3QgdHJhY2VkIGl4Z2JlIHRvIHVuZGVyc3RhbmQgd2h5IGRyaXZlciBoaXRzDQo+ICJj bGVhbl9jb21wbGV0ZT1mYWxzZSIgYWxsIHRoZSB0aW1lID8NCg0KRXJpYywNCg0KSSdtIGxvb2tp bmcgYXQgY29tbWl0IDM5ZTZjODIwOGQ3YiBhbmQgd29uZGVyaW5nIHRoYXQgaXQncyBkb2luZw0K Y2xlYXJfYml0KE5BUElfU1RBVEVfTUlTU0VELC4uKTsNCmZvciBidXN5X3BvbGxfc3RvcCgpLCBi dXQgbm90IGZvciBuZXRwb2xsLg0KQ2FuIHRoYXQgYmUgYW4gaXNzdWU/DQoNCmFuZCB0aGVuIHNv bWV0aGluZyBsaWtlIGJlbG93IGlzIG5lZWRlZDoNCmRpZmYgLS1naXQgYS9uZXQvY29yZS9uZXRw b2xsLmMgYi9uZXQvY29yZS9uZXRwb2xsLmMNCmluZGV4IDU3NTU3YTZhOTUwYy4uYTg0OGJlNmI1 MDNjIDEwMDY0NA0KLS0tIGEvbmV0L2NvcmUvbmV0cG9sbC5jDQorKysgYi9uZXQvY29yZS9uZXRw b2xsLmMNCkBAIC0xNzIsNiArMTcyLDcgQEAgc3RhdGljIHZvaWQgcG9sbF9vbmVfbmFwaShzdHJ1 Y3QgbmFwaV9zdHJ1Y3QgKm5hcGkpDQogICAgICAgICB0cmFjZV9uYXBpX3BvbGwobmFwaSwgd29y aywgMCk7DQoNCiAgICAgICAgIGNsZWFyX2JpdChOQVBJX1NUQVRFX05QU1ZDLCAmbmFwaS0+c3Rh dGUpOw0KKyAgICAgICBjbGVhcl9iaXQoTkFQSV9TVEFURV9NSVNTRUQsICZuYXBpLT5zdGF0ZSk7 DQogIH0NCg0KDQoNCg==