From mboxrd@z Thu Jan 1 00:00:00 1970 From: Bart Van Assche Subject: Re: [v4.13-rc BUG] system lockup when running big buffered write(4M) to IB SRP via mpath Date: Tue, 8 Aug 2017 23:10:45 +0000 Message-ID: <1502233843.2686.4.camel@wdc.com> References: <20170808141715.GB22763@ming.t460p> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: In-Reply-To: <20170808141715.GB22763@ming.t460p> Content-Language: en-US Content-ID: <1AF7A6A916E81F479B612A2B4CDAADFF@namprd04.prod.outlook.com> Sender: linux-scsi-owner@vger.kernel.org To: "dm-devel@redhat.com" , "linux-scsi@vger.kernel.org" , "linux-block@vger.kernel.org" , "ming.lei@redhat.com" Cc: "loberman@redhat.com" List-Id: dm-devel.ids T24gVHVlLCAyMDE3LTA4LTA4IGF0IDIyOjE3ICswODAwLCBNaW5nIExlaSB3cm90ZToNCj4gTGF1 cmVuY2UgYW5kIEkgc2VlIGEgc3lzdGVtIGxvY2t1cCBpc3N1ZSB3aGVuIHJ1bm5pbmcgY29uY3Vy cmVudA0KPiBiaWcgYnVmZmVyZWQgd3JpdGUoNE0gYnl0ZXMpIHRvIElCIFNSUCBvbiB2NC4xMy1y YzMuDQo+IFsgLi4uIF0gDQo+IAkjY2F0IGhhbW1lcl93cml0ZS5zaA0KPiAJIyEvYmluL2Jhc2gN Cj4gCXdoaWxlIHRydWU7IGRvDQo+IAkJZGQgaWY9L2Rldi96ZXJvIG9mPS9kZXYvbWFwcGVyLyQx IGJzPTQwOTZrIGNvdW50PTgwMCAJDQo+ICAgICAgIGRvbmUNCg0KSGVsbG8gTGF1cmVuY2UsDQoN CklzIHlvdXIgZ29hbCBwZXJoYXBzIHRvIHNpbXVsYXRlIGEgREROIHdvcmtsb2FkPyBJbiB0aGF0 IGNhc2UgSSB0aGluayB5b3UNCm5lZWQgb2ZsYWc9ZGlyZWN0IHRvIHRoZSBkZCBhcmd1bWVudCBs aXN0IHN1Y2ggdGhhdCB0aGUgcGFnZSBjYWNoZSB3cml0ZWJhY2sNCmNvZGUgZG9lcyBub3QgYWx0 ZXIgdGhlIHNpemUgb2YgdGhlIHdyaXRlIHJlcXVlc3RzLiBBbnl3YXksIHRoaXMgdGVzdCBzaG91 bGQNCm5vdCB0cmlnZ2VyIGEgbG9ja3VwLiBDYW4geW91IGNoZWNrIHdoZXRoZXIgdGhlIHBhdGNo IGJlbG93IG1ha2VzIHRoZSBzb2Z0DQpsb2NrdXAgY29tcGxhaW50cyBkaXNhcHBlYXIgKHdpdGhv dXQgY2hhbmdpbmcgdGhlIGhhbW1lcl93cml0ZS5zaCB0ZXN0DQpzY3JpcHQpPw0KDQpUaGFua3Ms DQoNCkJhcnQuDQotLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0t LS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tDQpbUEFUQ0hdIGJsb2NrOiBNYWtlIGJsa19t cV9kZWxheV9raWNrX3JlcXVldWVfbGlzdCgpIHJlcnVuIHRoZSBxdWV1ZSBhdCBhDQpxdWlldCB0 aW1lDQoNCkRyaXZlcnMgbGlrZSBkbS1tcGF0aCByZXF1ZXVlIHJlcXVlc3RzIGlmIG5vIHBhdGhz IGFyZSBhdmFpbGFibGUgYW5kDQppZiBjb25maWd1cmVkIHRvIGRvIHNvLiBJZiB0aGUgcXVldWUg ZGVwdGggaXMgc3VmZmljaWVudGx5IGhpZ2ggYW5kDQp0aGUgcXVldWUgcmVydW5uaW5nIGRlbGF5 IHN1ZmZpY2llbnRseSBzaG9ydCB0aGVuIC5yZXF1ZXVlX3dvcmsgY2FuDQpiZSBxdWV1ZWQgc28g b2Z0ZW4gdGhhdCBvdGhlciB3b3JrIGl0ZW1zIHF1ZXVlZCBvbiB0aGUgc2FtZSB3b3JrIHF1ZXVl DQpkbyBub3QgZ2V0IGV4ZWN1dGVkLiBBdm9pZCB0aGF0IHRoaXMgaGFwcGVucyBieSBvbmx5IHJl cnVubmluZyB0aGUNCnF1ZXVlIGFmdGVyIG5vIGJsa19tcV9kZWxheV9raWNrX3JlcXVldWVfbGlz dCgpIGNhbGxzIGhhdmUgb2NjdXJyZWQNCmR1cmluZyBAbXNlY3MgbWlsbGlzZWNvbmRzLiBTaW5j ZSB0aGUgZGV2aWNlIG1hcHBlciBjb3JlIGlzIHRoZSBvbmx5DQp1c2VyIG9mIGJsa19tcV9kZWxh eV9raWNrX3JlcXVldWVfbGlzdCgpLCBtb2RpZnkgdGhlIGltcGxlbWVudGF0aW9uDQpvZiB0aGlz IGZ1bmN0aW9uIGluc3RlYWQgb2YgY3JlYXRpbmcgYSBuZXcgZnVuY3Rpb24uDQoNClNpZ25lZC1v ZmYtYnk6IEJhcnQgVmFuIEFzc2NoZSA8YmFydC52YW5hc3NjaGVAd2RjLmNvbT4NCi0tLQ0KIGJs b2NrL2Jsay1tcS5jIHwgNCArKy0tDQogMSBmaWxlIGNoYW5nZWQsIDIgaW5zZXJ0aW9ucygrKSwg MiBkZWxldGlvbnMoLSkNCg0KZGlmZiAtLWdpdCBhL2Jsb2NrL2Jsay1tcS5jIGIvYmxvY2svYmxr LW1xLmMNCmluZGV4IDA0MWY3YjdmYTBkNi4uOGJmZWEzNmU5MmY5IDEwMDY0NA0KLS0tIGEvYmxv Y2svYmxrLW1xLmMNCisrKyBiL2Jsb2NrL2Jsay1tcS5jDQpAQCAtNjc5LDggKzY3OSw4IEBAIEVY UE9SVF9TWU1CT0woYmxrX21xX2tpY2tfcmVxdWV1ZV9saXN0KTsNCiB2b2lkIGJsa19tcV9kZWxh eV9raWNrX3JlcXVldWVfbGlzdChzdHJ1Y3QgcmVxdWVzdF9xdWV1ZSAqcSwNCiAJCQkJICAgIHVu c2lnbmVkIGxvbmcgbXNlY3MpDQogew0KLQlrYmxvY2tkX3NjaGVkdWxlX2RlbGF5ZWRfd29yaygm cS0+cmVxdWV1ZV93b3JrLA0KLQkJCQkgICAgICBtc2Vjc190b19qaWZmaWVzKG1zZWNzKSk7DQor CWtibG9ja2RfbW9kX2RlbGF5ZWRfd29ya19vbihXT1JLX0NQVV9VTkJPVU5ELCAmcS0+cmVxdWV1 ZV93b3JrLA0KKwkJCQkgICAgbXNlY3NfdG9famlmZmllcyhtc2VjcykpOw0KIH0NCiBFWFBPUlRf U1lNQk9MKGJsa19tcV9kZWxheV9raWNrX3JlcXVldWVfbGlzdCk7DQo= From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Bart Van Assche To: "dm-devel@redhat.com" , "linux-scsi@vger.kernel.org" , "linux-block@vger.kernel.org" , "ming.lei@redhat.com" CC: "loberman@redhat.com" Subject: Re: [v4.13-rc BUG] system lockup when running big buffered write(4M) to IB SRP via mpath Date: Tue, 8 Aug 2017 23:10:45 +0000 Message-ID: <1502233843.2686.4.camel@wdc.com> References: <20170808141715.GB22763@ming.t460p> In-Reply-To: <20170808141715.GB22763@ming.t460p> Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Sender: linux-scsi-owner@vger.kernel.org List-ID: T24gVHVlLCAyMDE3LTA4LTA4IGF0IDIyOjE3ICswODAwLCBNaW5nIExlaSB3cm90ZToNCj4gTGF1 cmVuY2UgYW5kIEkgc2VlIGEgc3lzdGVtIGxvY2t1cCBpc3N1ZSB3aGVuIHJ1bm5pbmcgY29uY3Vy cmVudA0KPiBiaWcgYnVmZmVyZWQgd3JpdGUoNE0gYnl0ZXMpIHRvIElCIFNSUCBvbiB2NC4xMy1y YzMuDQo+IFsgLi4uIF0gDQo+IAkjY2F0IGhhbW1lcl93cml0ZS5zaA0KPiAJIyEvYmluL2Jhc2gN Cj4gCXdoaWxlIHRydWU7IGRvDQo+IAkJZGQgaWY9L2Rldi96ZXJvIG9mPS9kZXYvbWFwcGVyLyQx IGJzPTQwOTZrIGNvdW50PTgwMCAJDQo+ICAgICAgIGRvbmUNCg0KSGVsbG8gTGF1cmVuY2UsDQoN CklzIHlvdXIgZ29hbCBwZXJoYXBzIHRvIHNpbXVsYXRlIGEgREROIHdvcmtsb2FkPyBJbiB0aGF0 IGNhc2UgSSB0aGluayB5b3UNCm5lZWQgb2ZsYWc9ZGlyZWN0IHRvIHRoZSBkZCBhcmd1bWVudCBs aXN0IHN1Y2ggdGhhdCB0aGUgcGFnZSBjYWNoZSB3cml0ZWJhY2sNCmNvZGUgZG9lcyBub3QgYWx0 ZXIgdGhlIHNpemUgb2YgdGhlIHdyaXRlIHJlcXVlc3RzLiBBbnl3YXksIHRoaXMgdGVzdCBzaG91 bGQNCm5vdCB0cmlnZ2VyIGEgbG9ja3VwLiBDYW4geW91IGNoZWNrIHdoZXRoZXIgdGhlIHBhdGNo IGJlbG93IG1ha2VzIHRoZSBzb2Z0DQpsb2NrdXAgY29tcGxhaW50cyBkaXNhcHBlYXIgKHdpdGhv dXQgY2hhbmdpbmcgdGhlIGhhbW1lcl93cml0ZS5zaCB0ZXN0DQpzY3JpcHQpPw0KDQpUaGFua3Ms DQoNCkJhcnQuDQotLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0t LS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tDQpbUEFUQ0hdIGJsb2NrOiBNYWtlIGJsa19t cV9kZWxheV9raWNrX3JlcXVldWVfbGlzdCgpIHJlcnVuIHRoZSBxdWV1ZSBhdCBhDQpxdWlldCB0 aW1lDQoNCkRyaXZlcnMgbGlrZSBkbS1tcGF0aCByZXF1ZXVlIHJlcXVlc3RzIGlmIG5vIHBhdGhz IGFyZSBhdmFpbGFibGUgYW5kDQppZiBjb25maWd1cmVkIHRvIGRvIHNvLiBJZiB0aGUgcXVldWUg ZGVwdGggaXMgc3VmZmljaWVudGx5IGhpZ2ggYW5kDQp0aGUgcXVldWUgcmVydW5uaW5nIGRlbGF5 IHN1ZmZpY2llbnRseSBzaG9ydCB0aGVuIC5yZXF1ZXVlX3dvcmsgY2FuDQpiZSBxdWV1ZWQgc28g b2Z0ZW4gdGhhdCBvdGhlciB3b3JrIGl0ZW1zIHF1ZXVlZCBvbiB0aGUgc2FtZSB3b3JrIHF1ZXVl DQpkbyBub3QgZ2V0IGV4ZWN1dGVkLiBBdm9pZCB0aGF0IHRoaXMgaGFwcGVucyBieSBvbmx5IHJl cnVubmluZyB0aGUNCnF1ZXVlIGFmdGVyIG5vIGJsa19tcV9kZWxheV9raWNrX3JlcXVldWVfbGlz dCgpIGNhbGxzIGhhdmUgb2NjdXJyZWQNCmR1cmluZyBAbXNlY3MgbWlsbGlzZWNvbmRzLiBTaW5j ZSB0aGUgZGV2aWNlIG1hcHBlciBjb3JlIGlzIHRoZSBvbmx5DQp1c2VyIG9mIGJsa19tcV9kZWxh eV9raWNrX3JlcXVldWVfbGlzdCgpLCBtb2RpZnkgdGhlIGltcGxlbWVudGF0aW9uDQpvZiB0aGlz IGZ1bmN0aW9uIGluc3RlYWQgb2YgY3JlYXRpbmcgYSBuZXcgZnVuY3Rpb24uDQoNClNpZ25lZC1v ZmYtYnk6IEJhcnQgVmFuIEFzc2NoZSA8YmFydC52YW5hc3NjaGVAd2RjLmNvbT4NCi0tLQ0KIGJs b2NrL2Jsay1tcS5jIHwgNCArKy0tDQogMSBmaWxlIGNoYW5nZWQsIDIgaW5zZXJ0aW9ucygrKSwg MiBkZWxldGlvbnMoLSkNCg0KZGlmZiAtLWdpdCBhL2Jsb2NrL2Jsay1tcS5jIGIvYmxvY2svYmxr LW1xLmMNCmluZGV4IDA0MWY3YjdmYTBkNi4uOGJmZWEzNmU5MmY5IDEwMDY0NA0KLS0tIGEvYmxv Y2svYmxrLW1xLmMNCisrKyBiL2Jsb2NrL2Jsay1tcS5jDQpAQCAtNjc5LDggKzY3OSw4IEBAIEVY UE9SVF9TWU1CT0woYmxrX21xX2tpY2tfcmVxdWV1ZV9saXN0KTsNCiB2b2lkIGJsa19tcV9kZWxh eV9raWNrX3JlcXVldWVfbGlzdChzdHJ1Y3QgcmVxdWVzdF9xdWV1ZSAqcSwNCiAJCQkJICAgIHVu c2lnbmVkIGxvbmcgbXNlY3MpDQogew0KLQlrYmxvY2tkX3NjaGVkdWxlX2RlbGF5ZWRfd29yaygm cS0+cmVxdWV1ZV93b3JrLA0KLQkJCQkgICAgICBtc2Vjc190b19qaWZmaWVzKG1zZWNzKSk7DQor CWtibG9ja2RfbW9kX2RlbGF5ZWRfd29ya19vbihXT1JLX0NQVV9VTkJPVU5ELCAmcS0+cmVxdWV1 ZV93b3JrLA0KKwkJCQkgICAgbXNlY3NfdG9famlmZmllcyhtc2VjcykpOw0KIH0NCiBFWFBPUlRf U1lNQk9MKGJsa19tcV9kZWxheV9raWNrX3JlcXVldWVfbGlzdCk7DQo=