From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jongman Heo Subject: Re: Re: [PATCH v2] inet: fix possible seqlock deadlocks Date: Fri, 29 Nov 2013 10:42:41 +0000 (GMT) Message-ID: <788421.176041385721758959.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 , Hannes Frederic Sowa , "linux-kernel@vger.kernel.org" To: Eric Dumazet , "netdev@vger.kernel.org" Return-path: MIME-version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org DQotLS0tLS0tIE9yaWdpbmFsIE1lc3NhZ2UgLS0tLS0tLQ0KU2VuZGVyIDogSm9uZ21hbiBIZW8g PGpvbmdtYW4uaGVvQHNhbXN1bmcuY29tPg0KRGF0ZSA6IDIwMTMtMTEtMjkgMTE6MDggKEdNVCsw OTowMCkNClRpdGxlIDogUmU6IFtQQVRDSCB2Ml0gaW5ldDogZml4IHBvc3NpYmxlIHNlcWxvY2sg ZGVhZGxvY2tzDQo+DQo+DQo+LS0tLS0tIE9yaWdpbmFsIE1lc3NhZ2UgLS0tLS0tLQ0KPlNlbmRl ciA6IEVyaWMgRHVtYXpldA0KPkRhdGUgOiAyMDEzLTExLTI5IDAyOjUxIChHTVQrMDk6MDApDQo+ VGl0bGUgOiBbUEFUQ0ggdjJdIGluZXQ6IGZpeCBwb3NzaWJsZSBzZXFsb2NrIGRlYWRsb2Nrcw0K Pj4gDQo+PiBGcm9tOiBFcmljIER1bWF6ZXQgDQo+PiANCj4+IEluIGNvbW1pdCBjOWU5MDQyOTk0 ZDMgKCJpcHY0OiBmaXggcG9zc2libGUgc2VxbG9jayBkZWFkbG9jayIpIEkgbGVmdA0KPj4gYW5v dGhlciBwbGFjZXMgd2hlcmUgSVBfSU5DX1NUQVRTX0JIKCkgd2VyZSBpbXByb3Blcmx5IHVzZWQu DQo+PiANCj4+IHVkcF9zZW5kbXNnKCksIHBpbmdfdjRfc2VuZG1zZygpIGFuZCB0Y3BfdjRfY29u bmVjdCgpIGFyZSBjYWxsZWQgZnJvbQ0KPj4gcHJvY2VzcyBjb250ZXh0LCBub3QgZnJvbSBzb2Z0 aXJxIGNvbnRleHQuDQo+PiANCj4+IFRoaXMgd2FzIGRldGVjdGVkIGJ5IGxvY2tkZXAgc2VxbG9j ayBzdXBwb3J0Lg0KPj4gDQo+PiBSZXBvcnRlZC1ieTogam9uZ21hbiBoZW8gDQo+PiBGaXhlczog NTg0YmRmOGNiZGY2ICgiW0lQVjRdOiBGaXggImlwT3V0Tm9Sb3V0ZXMiIGNvdW50ZXIgZXJyb3Ig Zm9yIFRDUCBhbmQgVURQIikNCj4+IEZpeGVzOiBjMzE5YjRkNzZiOWUgKCJuZXQ6IGlwdjQ6IGFk ZCBJUFBST1RPX0lDTVAgc29ja2V0IGtpbmQiKQ0KPj4gU2lnbmVkLW9mZi1ieTogRXJpYyBEdW1h emV0IA0KPj4gQ2M6IEhhbm5lcyBGcmVkZXJpYyBTb3dhIA0KPj4gLS0tDQo+PiBuZXQvaXB2NC9w aW5nLmMgICAgIHwgICAgMiArLQ0KPj4gbmV0L2lwdjQvdGNwX2lwdjQuYyB8ICAgIDIgKy0NCj4+ IG5ldC9pcHY0L3VkcC5jICAgICAgfCAgICAyICstDQo+PiAzIGZpbGVzIGNoYW5nZWQsIDMgaW5z ZXJ0aW9ucygrKSwgMyBkZWxldGlvbnMoLSkNCj4+IA0KPj4gZGlmZiAtLWdpdCBhL25ldC9pcHY0 L3BpbmcuYyBiL25ldC9pcHY0L3BpbmcuYw0KPj4gaW5kZXggODQwY2YxYjllNmVlLi4yNDJlN2Y0 ZWQ2ZjQgMTAwNjQ0DQo+PiAtLS0gYS9uZXQvaXB2NC9waW5nLmMNCj4+ICsrKyBiL25ldC9pcHY0 L3BpbmcuYw0KPj4gQEAgLTc3Miw3ICs3NzIsNyBAQCBpbnQgcGluZ192NF9zZW5kbXNnKHN0cnVj dCBraW9jYiAqaW9jYiwgc3RydWN0IHNvY2sgKnNrLCBzdHJ1Y3QgbXNnaGRyICptc2csDQo+PiBl cnIgPSBQVFJfRVJSKHJ0KTsNCj4+IHJ0ID0gTlVMTDsNCj4+IGlmIChlcnIgPT0gLUVORVRVTlJF QUNIKQ0KPj4gLSBJUF9JTkNfU1RBVFNfQkgobmV0LCBJUFNUQVRTX01JQl9PVVROT1JPVVRFUyk7 DQo+PiArIElQX0lOQ19TVEFUUyhuZXQsIElQU1RBVFNfTUlCX09VVE5PUk9VVEVTKTsNCj4+IGdv dG8gb3V0Ow0KPj4gfQ0KPj4gDQo+PiBkaWZmIC0tZ2l0IGEvbmV0L2lwdjQvdGNwX2lwdjQuYyBi L25ldC9pcHY0L3RjcF9pcHY0LmMNCj4+IGluZGV4IDU5YTZmOGI5MGNkOS4uMDY3MjEzOTI0NzUx IDEwMDY0NA0KPj4gLS0tIGEvbmV0L2lwdjQvdGNwX2lwdjQuYw0KPj4gKysrIGIvbmV0L2lwdjQv dGNwX2lwdjQuYw0KPj4gQEAgLTE3Nyw3ICsxNzcsNyBAQCBpbnQgdGNwX3Y0X2Nvbm5lY3Qoc3Ry dWN0IHNvY2sgKnNrLCBzdHJ1Y3Qgc29ja2FkZHIgKnVhZGRyLCBpbnQgYWRkcl9sZW4pDQo+PiBp ZiAoSVNfRVJSKHJ0KSkgew0KPj4gZXJyID0gUFRSX0VSUihydCk7DQo+PiBpZiAoZXJyID09IC1F TkVUVU5SRUFDSCkNCj4+IC0gSVBfSU5DX1NUQVRTX0JIKHNvY2tfbmV0KHNrKSwgSVBTVEFUU19N SUJfT1VUTk9ST1VURVMpOw0KPj4gKyBJUF9JTkNfU1RBVFMoc29ja19uZXQoc2spLCBJUFNUQVRT X01JQl9PVVROT1JPVVRFUyk7DQo+PiByZXR1cm4gZXJyOw0KPj4gfQ0KPj4gDQo+PiBkaWZmIC0t Z2l0IGEvbmV0L2lwdjQvdWRwLmMgYi9uZXQvaXB2NC91ZHAuYw0KPj4gaW5kZXggNDRkZmFhMDli NTg0Li40NGUzODg0ZjllNGMgMTAwNjQ0DQo+PiAtLS0gYS9uZXQvaXB2NC91ZHAuYw0KPj4gKysr IGIvbmV0L2lwdjQvdWRwLmMNCj4+IEBAIC05OTksNyArOTk5LDcgQEAgaW50IHVkcF9zZW5kbXNn KHN0cnVjdCBraW9jYiAqaW9jYiwgc3RydWN0IHNvY2sgKnNrLCBzdHJ1Y3QgbXNnaGRyICptc2cs DQo+PiBlcnIgPSBQVFJfRVJSKHJ0KTsNCj4+IHJ0ID0gTlVMTDsNCj4+IGlmIChlcnIgPT0gLUVO RVRVTlJFQUNIKQ0KPj4gLSBJUF9JTkNfU1RBVFNfQkgobmV0LCBJUFNUQVRTX01JQl9PVVROT1JP VVRFUyk7DQo+PiArIElQX0lOQ19TVEFUUyhuZXQsIElQU1RBVFNfTUlCX09VVE5PUk9VVEVTKTsN Cj4+IGdvdG8gb3V0Ow0KPj4gfQ0KPj4gDQo+DQo+SGksIEVyaWMsDQo+DQo+SSd2ZSBhcHBsaWVk IHlvdXIgcGF0Y2gsIGFuZCB3aWxsIGxldCB5b3Uga25vdyB0aGUgcmVzdWx0LCBhZnRlciBhIGZ1 bGwgZGF5IG9yIGhhbGYgZGF5IHRlc3QuDQo+VXN1YWxseSB0aGUgaXNzdWUgaGFwcGVucyB3aXRo aW4gMTAgbWludXRlcyBhZnRlciBib290LCBidXQgdG8gYmUgc3VyZS4uLg0KPg0KPlJlZ2FyZHMs DQo+Sm9uZ21hbiBIZW8uDQo+DQoNCkhpLCBFcmljLA0KDQpJdCBoYXMgc3Vydml2ZWQgYWJvdXQg OSBob3VycywgbG9va3MgZmluZS4gVGhhbmtzfi4NCg0KVGVzdGVkLWJ5OiBKb25nbWFuIEhlbyA8 am9uZ21hbi5oZW9Ac2Ftc3VuZy5jb20+DQo=