From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jongman Heo Subject: Re: [PATCH v2] inet: fix possible seqlock deadlocks Date: Fri, 29 Nov 2013 02:08:29 +0000 (GMT) Message-ID: <20844393.153981385690907396.JavaMail.weblogic@epml08> Reply-To: jongman.heo@samsung.com Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: base64 Cc: David Miller , "netdev@vger.kernel.org" , "linux-kernel@vger.kernel.org" , Hannes Frederic Sowa To: Eric Dumazet Return-path: MIME-version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org IA0KLS0tLS0tIE9yaWdpbmFsIE1lc3NhZ2UgLS0tLS0tLQ0KU2VuZGVyIDogRXJpYyBEdW1hemV0 PGVyaWMuZHVtYXpldEBnbWFpbC5jb20+DQpEYXRlIDogMjAxMy0xMS0yOSAwMjo1MSAoR01UKzA5 OjAwKQ0KVGl0bGUgOiBbUEFUQ0ggdjJdIGluZXQ6IGZpeCBwb3NzaWJsZSBzZXFsb2NrIGRlYWRs b2Nrcw0KPiANCj4gRnJvbTogRXJpYyBEdW1hemV0IA0KPiANCj4gSW4gY29tbWl0IGM5ZTkwNDI5 OTRkMyAoImlwdjQ6IGZpeCBwb3NzaWJsZSBzZXFsb2NrIGRlYWRsb2NrIikgSSBsZWZ0DQo+IGFu b3RoZXIgcGxhY2VzIHdoZXJlIElQX0lOQ19TVEFUU19CSCgpIHdlcmUgaW1wcm9wZXJseSB1c2Vk Lg0KPiANCj4gdWRwX3NlbmRtc2coKSwgcGluZ192NF9zZW5kbXNnKCkgYW5kIHRjcF92NF9jb25u ZWN0KCkgYXJlIGNhbGxlZCBmcm9tDQo+IHByb2Nlc3MgY29udGV4dCwgbm90IGZyb20gc29mdGly cSBjb250ZXh0Lg0KPiANCj4gVGhpcyB3YXMgZGV0ZWN0ZWQgYnkgbG9ja2RlcCBzZXFsb2NrIHN1 cHBvcnQuDQo+IA0KPiBSZXBvcnRlZC1ieTogam9uZ21hbiBoZW8gDQo+IEZpeGVzOiA1ODRiZGY4 Y2JkZjYgKCJbSVBWNF06IEZpeCAiaXBPdXROb1JvdXRlcyIgY291bnRlciBlcnJvciBmb3IgVENQ IGFuZCBVRFAiKQ0KPiBGaXhlczogYzMxOWI0ZDc2YjllICgibmV0OiBpcHY0OiBhZGQgSVBQUk9U T19JQ01QIHNvY2tldCBraW5kIikNCj4gU2lnbmVkLW9mZi1ieTogRXJpYyBEdW1hemV0IA0KPiBD YzogSGFubmVzIEZyZWRlcmljIFNvd2EgDQo+IC0tLQ0KPiBuZXQvaXB2NC9waW5nLmMgICAgIHwg ICAgMiArLQ0KPiBuZXQvaXB2NC90Y3BfaXB2NC5jIHwgICAgMiArLQ0KPiBuZXQvaXB2NC91ZHAu YyAgICAgIHwgICAgMiArLQ0KPiAzIGZpbGVzIGNoYW5nZWQsIDMgaW5zZXJ0aW9ucygrKSwgMyBk ZWxldGlvbnMoLSkNCj4gDQo+IGRpZmYgLS1naXQgYS9uZXQvaXB2NC9waW5nLmMgYi9uZXQvaXB2 NC9waW5nLmMNCj4gaW5kZXggODQwY2YxYjllNmVlLi4yNDJlN2Y0ZWQ2ZjQgMTAwNjQ0DQo+IC0t LSBhL25ldC9pcHY0L3BpbmcuYw0KPiArKysgYi9uZXQvaXB2NC9waW5nLmMNCj4gQEAgLTc3Miw3 ICs3NzIsNyBAQCBpbnQgcGluZ192NF9zZW5kbXNnKHN0cnVjdCBraW9jYiAqaW9jYiwgc3RydWN0 IHNvY2sgKnNrLCBzdHJ1Y3QgbXNnaGRyICptc2csDQo+IGVyciA9IFBUUl9FUlIocnQpOw0KPiBy dCA9IE5VTEw7DQo+IGlmIChlcnIgPT0gLUVORVRVTlJFQUNIKQ0KPiAtIElQX0lOQ19TVEFUU19C SChuZXQsIElQU1RBVFNfTUlCX09VVE5PUk9VVEVTKTsNCj4gKyBJUF9JTkNfU1RBVFMobmV0LCBJ UFNUQVRTX01JQl9PVVROT1JPVVRFUyk7DQo+IGdvdG8gb3V0Ow0KPiB9DQo+IA0KPiBkaWZmIC0t Z2l0IGEvbmV0L2lwdjQvdGNwX2lwdjQuYyBiL25ldC9pcHY0L3RjcF9pcHY0LmMNCj4gaW5kZXgg NTlhNmY4YjkwY2Q5Li4wNjcyMTM5MjQ3NTEgMTAwNjQ0DQo+IC0tLSBhL25ldC9pcHY0L3RjcF9p cHY0LmMNCj4gKysrIGIvbmV0L2lwdjQvdGNwX2lwdjQuYw0KPiBAQCAtMTc3LDcgKzE3Nyw3IEBA IGludCB0Y3BfdjRfY29ubmVjdChzdHJ1Y3Qgc29jayAqc2ssIHN0cnVjdCBzb2NrYWRkciAqdWFk ZHIsIGludCBhZGRyX2xlbikNCj4gaWYgKElTX0VSUihydCkpIHsNCj4gZXJyID0gUFRSX0VSUihy dCk7DQo+IGlmIChlcnIgPT0gLUVORVRVTlJFQUNIKQ0KPiAtIElQX0lOQ19TVEFUU19CSChzb2Nr X25ldChzayksIElQU1RBVFNfTUlCX09VVE5PUk9VVEVTKTsNCj4gKyBJUF9JTkNfU1RBVFMoc29j a19uZXQoc2spLCBJUFNUQVRTX01JQl9PVVROT1JPVVRFUyk7DQo+IHJldHVybiBlcnI7DQo+IH0N Cj4gDQo+IGRpZmYgLS1naXQgYS9uZXQvaXB2NC91ZHAuYyBiL25ldC9pcHY0L3VkcC5jDQo+IGlu ZGV4IDQ0ZGZhYTA5YjU4NC4uNDRlMzg4NGY5ZTRjIDEwMDY0NA0KPiAtLS0gYS9uZXQvaXB2NC91 ZHAuYw0KPiArKysgYi9uZXQvaXB2NC91ZHAuYw0KPiBAQCAtOTk5LDcgKzk5OSw3IEBAIGludCB1 ZHBfc2VuZG1zZyhzdHJ1Y3Qga2lvY2IgKmlvY2IsIHN0cnVjdCBzb2NrICpzaywgc3RydWN0IG1z Z2hkciAqbXNnLA0KPiBlcnIgPSBQVFJfRVJSKHJ0KTsNCj4gcnQgPSBOVUxMOw0KPiBpZiAoZXJy ID09IC1FTkVUVU5SRUFDSCkNCj4gLSBJUF9JTkNfU1RBVFNfQkgobmV0LCBJUFNUQVRTX01JQl9P VVROT1JPVVRFUyk7DQo+ICsgSVBfSU5DX1NUQVRTKG5ldCwgSVBTVEFUU19NSUJfT1VUTk9ST1VU RVMpOw0KPiBnb3RvIG91dDsNCj4gfQ0KPiANCg0KSGksIEVyaWMsDQoNCkkndmUgYXBwbGllZCB5 b3VyIHBhdGNoLCBhbmQgd2lsbCBsZXQgeW91IGtub3cgdGhlIHJlc3VsdCwgYWZ0ZXIgYSBmdWxs IGRheSBvciBoYWxmIGRheSB0ZXN0Lg0KVXN1YWxseSB0aGUgaXNzdWUgaGFwcGVucyB3aXRoaW4g MTAgbWludXRlcyBhZnRlciBib290LCBidXQgdG8gYmUgc3VyZS4uLg0KDQpSZWdhcmRzLA0KSm9u Z21hbiBIZW8uDQo=