From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Damien Le Moal To: "hch@lst.de" , "mpatocka@redhat.com" CC: "tom.ty89@gmail.com" , "dm-devel@redhat.com" , "linux-block@vger.kernel.org" , "gmazyland@gmail.com" , "axboe@fb.com" , "axboe@kernel.dk" Subject: Re: [dm-devel] [BUG] BLKZEROOUT on dm-crypt container cause OOM / kernel panic Date: Mon, 14 Aug 2017 04:04:50 +0000 Message-ID: <1502683489.903.1.camel@wdc.com> References: <20170809133833.GA25681@lst.de> In-Reply-To: Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 List-ID: T24gU3VuLCAyMDE3LTA4LTEzIGF0IDIyOjQ3IC0wNDAwLCBNaWt1bGFzIFBhdG9ja2Egd3JvdGU6 DQo+IA0KPiBPbiBXZWQsIDkgQXVnIDIwMTcsIGhjaEBsc3QuZGUgd3JvdGU6DQo+IA0KPiA+IERv ZXMgY29tbWl0IDYxNWQyMmE1MWMwNDg1NmVmZTYyYWY2ZTFkNWI0NTBhYWY1Y2MyYzANCj4gPiAi YmxvY2s6IEZpeCBfX2Jsa2Rldl9pc3N1ZV96ZXJvb3V0IGxvb3AiIGZpeCB0aGUgaXNzdWUgZm9y IHlvdT8NCj4gPiANCj4gPiAtLQ0KPiA+IGRtLWRldmVsIG1haWxpbmcgbGlzdA0KPiA+IGRtLWRl dmVsQHJlZGhhdC5jb20NCj4gPiBodHRwczovL3d3dy5yZWRoYXQuY29tL21haWxtYW4vbGlzdGlu Zm8vZG0tZGV2ZWwNCj4gDQo+IEkgdGhpbmsgdGhhdCBwYXRjaCBpcyBpbmNvcnJlY3QuIHNlY3Rv cl90IG1heSBiZSBhIDMyLWJpdCB0eXBlIGFuZCANCj4gbnJfc2VjdHMgPDwgOSBtYXkgb3ZlcmZs b3cuDQo+IA0KPiBzdGF0aWMgdW5zaWduZWQgaW50IF9fYmxrZGV2X3NlY3RvcnNfdG9fYmlvX3Bh Z2VzKHNlY3Rvcl90IG5yX3NlY3RzKQ0KPiB7DQo+ICAgICAgICBzZWN0b3JfdCBieXRlcyA9IChu cl9zZWN0cyA8PCA5KSArIFBBR0VfU0laRSAtIDE7DQo+IA0KPiAgICAgICAgcmV0dXJuIG1pbihi eXRlcyA+PiBQQUdFX1NISUZULCAoc2VjdG9yX3QpQklPX01BWF9QQUdFUyk7DQo+IH0NCj4gDQo+ IE1pa3VsYXMNCg0KTWlrdWxhcywNCg0KRG9lcyB0aGUgZm9sbHdpbmcgcGF0Y2ggZml4IHRoZSBw cm9ibGVtID8NCg0KRnJvbSA5NDdiM2NmNDFlNzU5YjJiMjNmNjg0ZTIxNWU2NTFkMGM4MDM3Zjg4 IE1vbiBTZXAgMTcgMDA6MDA6MDAgMjAwMQ0KRnJvbTogRGFtaWVuIExlIE1vYWwgPGRhbWllbi5s ZW1vYWxAd2RjLmNvbT4NCkRhdGU6IE1vbiwgMTQgQXVnIDIwMTcgMTM6MDE6MTYgKzA5MDANClN1 YmplY3Q6IFtQQVRDSF0gYmxvY2s6IEZpeCBfX2Jsa2Rldl9zZWN0b3JzX3RvX2Jpb19wYWdlcygp DQoNCk9uIDMyYml0IHN5c3RlbXMgd2hlcmUgc2VjdG9yX3QgaXMgYSAzMmJpdHMgdHlwZSwgdGhl IGNhbGN1bGF0aW9uIG9mDQpieXRlcyBtYXkgb3ZlcmZsb3cuIFVzZSB0aGUgdTY0IHR5cGUgZm9y IHRoZSBsb2NhbCBjYWxjdWxhdGlvbiB0byBhdm9pZA0Kb3ZlcmZsb3dzLg0KDQpTaWduZWQtb2Zm LWJ5OiBEYW1pZW4gTGUgTW9hbCA8ZGFtaWVuLmxlbW9hbEB3ZGMuY29tPg0KLS0tDQogYmxvY2sv YmxrLWxpYi5jIHwgNCArKy0tDQogMSBmaWxlIGNoYW5nZWQsIDIgaW5zZXJ0aW9ucygrKSwgMiBk ZWxldGlvbnMoLSkNCg0KZGlmZiAtLWdpdCBhL2Jsb2NrL2Jsay1saWIuYyBiL2Jsb2NrL2Jsay1s aWIuYw0KaW5kZXggM2ZlMGFlYzkwNTk3Li5jY2YyMmRiYTIxZjAgMTAwNjQ0DQotLS0gYS9ibG9j ay9ibGstbGliLmMNCisrKyBiL2Jsb2NrL2Jsay1saWIuYw0KQEAgLTI2OSw5ICsyNjksOSBAQCBz dGF0aWMgaW50IF9fYmxrZGV2X2lzc3VlX3dyaXRlX3plcm9lcyhzdHJ1Y3QgYmxvY2tfZGV2aWNl DQoqYmRldiwNCiAgKi8NCiBzdGF0aWMgdW5zaWduZWQgaW50IF9fYmxrZGV2X3NlY3RvcnNfdG9f YmlvX3BhZ2VzKHNlY3Rvcl90IG5yX3NlY3RzKQ0KIHsNCi0Jc2VjdG9yX3QgYnl0ZXMgPSAobnJf c2VjdHMgPDwgOSkgKyBQQUdFX1NJWkUgLSAxOw0KKwl1NjQgYnl0ZXMgPSAoKHU2NClucl9zZWN0 cyA8PCA5KSArIFBBR0VfU0laRSAtIDE7DQogDQotCXJldHVybiBtaW4oYnl0ZXMgPj4gUEFHRV9T SElGVCwgKHNlY3Rvcl90KUJJT19NQVhfUEFHRVMpOw0KKwlyZXR1cm4gbWluKGJ5dGVzID4+IFBB R0VfU0hJRlQsICh1NjQpQklPX01BWF9QQUdFUyk7DQogfQ0KIA0KIC8qKg0KLS0gDQoyLjEzLjQN Cg0KDQotLSANCkRhbWllbiBMZSBNb2FsDQpXZXN0ZXJuIERpZ2l0YWw=