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Wed, 21 Sep 2022 22:51:20 -0700 Received: from mtkcas11.mediatek.inc (172.21.101.40) by mtkmbs10n2.mediatek.inc (172.21.101.183) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id 15.2.792.3; Thu, 22 Sep 2022 13:40:47 +0800 Received: from mtksdccf07 (172.21.84.99) by mtkcas11.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Thu, 22 Sep 2022 13:40:47 +0800 Message-ID: <93f4ce9486ec4b856ba0f3bfe956fc9b2d3cb4cf.camel@mediatek.com> Subject: Re: BUG: HANG_DETECT waiting for migration_cpu_stop() complete From: Jing-Ting Wu To: Hillf Danton CC: Peter Zijlstra , , , Waiman Long , ValentinSchneider , TejunHeo , , , , , "chris.redpath@arm.com" , Dietmar Eggemann , "Vincent Donnefort" , Ingo Molnar , Juri Lelli , Vincent Guittot , Dietmar Eggemann , Steven Rostedt , Ben Segall , Mel Gorman , Christian Brauner , , , Date: Thu, 22 Sep 2022 13:40:47 +0800 In-Reply-To: <20220907000741.2496-1-hdanton@sina.com> References: <20220907000741.2496-1-hdanton@sina.com> X-Mailer: Evolution 3.28.5-0ubuntu0.18.04.2 MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220921_225137_932229_C4938638 X-CRM114-Status: GOOD ( 20.13 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org T24gV2VkLCAyMDIyLTA5LTA3IGF0IDA4OjA3ICswODAwLCBIaWxsZiBEYW50b24gd3JvdGU6Cj4g T24gNSBTZXAgMjAyMiAxMDo0NzozNiArMDgwMCBKaW5nLVRpbmcgV3UgPGppbmctdGluZy53dUBt ZWRpYXRlay5jb20+Cj4gd3JvdGUKPiA+IAo+ID4gV2UgbWVldCB0aGUgSEFOR19ERVRFQ1QgaGFw cGVuZWQgaW4gVCBTVyB2ZXJzaW9uIHdpdGgga2VybmVsLTUuMTUuCj4gPiBNYW55IHRhc2tzIGhh dmUgYmVlbiBibG9ja2VkIGZvciBhIGxvbmcgdGltZS4KPiA+IAo+ID4gUm9vdCBjYXVzZToKPiA+ IG1pZ3JhdGlvbl9jcHVfc3RvcCgpIGlzIG5vdCBjb21wbGV0ZSBkdWUgdG8KPiA+IGlzX21pZ3Jh dGlvbl9kaXNhYmxlZChwKSBpcwo+ID4gdHJ1ZSwgY29tcGxldGUgaXMgZmFsc2UgYW5kIGNvbXBs ZXRlX2FsbCgpIG5ldmVyIGdldCBleGVjdXRlZC4KPiA+IEl0IGxldCBvdGhlciB0YXNrIHdhaXQg dGhlIHJ3c2VtLgo+IAo+IFNlZSBpZiBoYW5kaW5nIHRhc2sgb3ZlciB0byBzdG9wcGVyIGFnYWlu IGluIGNhc2Ugb2YgbWlncmF0aW9uCj4gZGlzYWJsZWQKPiBjb3VsZCBzdXJ2aXZlIHlvdXIgdGVz dHMuCj4gCj4gSGlsbGYKPiAKPiAtLS0gbGludXgtNS4xNS9rZXJuZWwvc2NoZWQvY29yZS5jCj4g KysrIGIva2VybmVsL3NjaGVkL2NvcmUuYwo+IEBAIC0yMzIyLDkgKzIzMjIsNyBAQCBzdGF0aWMg aW50IG1pZ3JhdGlvbl9jcHVfc3RvcCh2b2lkICpkYXRhCj4gIAkgKiBob2xkaW5nIHJxLT5sb2Nr LCBpZiBwLT5vbl9ycSA9PSAwIGl0IGNhbm5vdCBnZXQgZW5xdWV1ZWQKPiBiZWNhdXNlCj4gIAkg KiB3ZSdyZSBob2xkaW5nIHAtPnBpX2xvY2suCj4gIAkgKi8KPiAtCWlmICh0YXNrX3JxKHApID09 IHJxKSB7Cj4gLQkJaWYgKGlzX21pZ3JhdGlvbl9kaXNhYmxlZChwKSkKPiAtCQkJZ290byBvdXQ7 Cj4gKwlpZiAodGFza19ycShwKSA9PSBycSAmJiAhaXNfbWlncmF0aW9uX2Rpc2FibGVkKHApKSB7 Cj4gIAo+ICAJCWlmIChwZW5kaW5nKSB7Cj4gIAkJCXAtPm1pZ3JhdGlvbl9wZW5kaW5nID0gTlVM TDsKCkJlY2F1c2UgUGV0ZXIgaGF2ZSBzb21lIGNvbmNlcm4gZm9yIHBhdGNoIGJ5IFdhaW1hbi4K V2UgYWRkIEhpbGxmJ3MgcGF0Y2ggdG8gb3VyIHN0YWJpbGl0eSB0ZXN0LgpCdXQgdGhlcmUgYXJl IHNpZGUgZWZmZWN0cyBhZnRlciBwYXRjaGVkLgpUaGUgd2FybmluZyBhcHBlYXIgb25jZSA8IHR3 byB3ZWVrcy4gCgpCYWNrdHJhY2UgYXMgZm9sbG93czoKW25hbWU6cGFuaWMmXVdBUk5JTkc6IENQ VTogNiBQSUQ6IDMyNTgzIGF0IGFmZmluZV9tb3ZlX3Rhc2sKcGMgOiBhZmZpbmVfbW92ZV90YXNr CmxyIDogX19zZXRfY3B1c19hbGxvd2VkX3B0cl9sb2NrZWQKQ2FsbCB0cmFjZToKYWZmaW5lX21v dmVfdGFzawpfX3NldF9jcHVzX2FsbG93ZWRfcHRyX2xvY2tlZAptaWdyYXRlX2VuYWJsZQpfX2Nn cm91cF9icGZfcnVuX2ZpbHRlcl9za2IKaXBfZmluaXNoX291dHB1dAppcF9vdXRwdXQKCgpUaGUg cm9vdCBjYXVzZSBpcyB3aGVuIGlzX21pZ3JhdGlvbl9kaXNhYmxlZChwKSBpcyB0cnVl77yMdGhl IHBhdGNoZWQKdmVyc2lvbiB3aWxsIHNldCBwLT5taWdyYXRpb25fcGVuZGluZyB0byBOVUxMIGJ5 IG1pZ3JhdGlvbl9jcHVfc3RvcC4KQW5kIGluIGFmZmluZV9tb3ZlX3Rhc2sgd2lsbCByYWlzZSBh IFdBUk5fT05fT05DRSghcGVuZGluZykuCgpLZXJuZWwtNS4xNS9rZXJuZWwvc2NoZWQvY29yZS5j OgpzdGF0aWMgaW50IGFmZmluZV9tb3ZlX3Rhc2soc3RydWN0IHJxICpycSwgc3RydWN0IHRhc2tf c3RydWN0ICpwLApzdHJ1Y3QgcnFfZmxhZ3MgKnJmLCBpbnQgZGVzdF9jcHUsIHVuc2lnbmVkIGlu dCBmbGFncykgewouLi4KCUlmIChXQVJOX09OX09OQ0UoIXBlbmRpbmcpKSB7CiAJICBUYXNrX3Jx X3VubG9jayhycSxwLGZyKTsKICAJICByZXR1cm4gLUVJTlZBTDsKCX0KLi4uCn0KCkJ1dCB0aGUg dGFza3MgaGF2ZSBub3QgYmVlbiBtaWdyYXRlZCB0byB0aGUgbmV3IGFmZmluaXR5IENQVSwgc28g dGhlcmUKc2hvdWxkIGJlIHBlbmRpbmcgdGFza3MgdG8gYmUgcHJvY2Vzc2VkLCBzbyBwLT5taWdy YXRpb25fcGVuZGluZyBzaG91bGQKbm90IGJlIE5VTEwuCgoKCldpdGhvdXQgcGF0Y2g6CldoZW4g aXNfbWlncmF0aW9uX2Rpc2FibGVkIGlzIHRydWUsIHRoZW4gZ290byBvdXQgYW5kIG5vdCBzZXQg cC0KPm1pZ3JhdGlvbl9wZW5kaW5nIHRvIE5VTEwuCgpzdGF0aWMgaW50IG1pZ3JhdGlvbl9jcHVf c3RvcCh2b2lkICpkYXRhKSB7Ci4uLgoJSWYgKHRhc2tfcnEocCkgPT0gcnEpIHsKICAgICAgICAJ ICAgICBpZiAoaXNfbWlncmF0aW9uX2Rpc2FibGVkKHApKQogICAgICAgICAgICAgICAgCSAgICAg ICAgICAgZ290byBvdXQ7Cgl9Ci4uLgp9CgoKV2l0aCBwYXRjaDoKV2hlbiBpc19taWdyYXRpb25f ZGlzYWJsZWQgaXMgdHJ1ZSBhbmQgcGVuZGluZyBpcyB0cnVlLCBnb3RvIGVsc2UgaWYKZmxvdy4g QmVjYXVzZSBwLT5jcHVzX3B0ciBub3QgdXBkYXRlZCB3aGVuIG1pZ3JhdGVfZGlzYWJsZSwgc28g dGhpcwpjb25kaXRpb24gaXMgYWx3YXlzIHRydWUgYW5kIHAtPm1pZ3JhdGlvbl9wZW5kaW5nIHdp bGwgc2V0IHRvIE5VTEwuCgpzdGF0aWMgaW50IG1pZ3JhdGlvbl9jcHVfc3RvcCh2b2lkICpkYXRh KSB7Ci4uLgoJSWYgKHRhc2tfcnEocCkgPT0gcnEgJiYgIWlzX21pZ3JhdGlvbl9kaXNhYmxlZChw KSApIHsKIAkgIC4uLgoJfSBlbHNlIGlmIChwZW5kaW5nKSB7CgkgIC4uLgoJICBJZiAoY3B1bWFz a190ZXN0X2NwdSh0YXNrX2NwdShwKSwgcC0+IGNwdXNfIHB0cikpIHsgCiAgICAgICAgCXAtPm1p Z3JhdGlvbl9wZW5kaW5nID0gTlVMTDsKICAgICAgCQkgY29tcGxldGUgPSB0cnVlOwogICAgICAJ CSBnb3RvIG91dDsKCX0KLi4uCn0KCgoKCgoKQmVzdCByZWdhcmRzLApKaW5nLVRpbmcgV3UKCgoK X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KbGludXgtYXJt LWtlcm5lbCBtYWlsaW5nIGxpc3QKbGludXgtYXJtLWtlcm5lbEBsaXN0cy5pbmZyYWRlYWQub3Jn Cmh0dHA6Ly9saXN0cy5pbmZyYWRlYWQub3JnL21haWxtYW4vbGlzdGluZm8vbGludXgtYXJtLWtl cm5lbAo=