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([2601:647:4802:9070:16e2:6f16:c01c:df28]) by smtp.gmail.com with ESMTPSA id c18sm1539660wrt.10.2020.10.20.21.59.03 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 20 Oct 2020 21:59:05 -0700 (PDT) Subject: Re: [PATCH 0/3] avoid race between time out and tear down To: Chao Leng , linux-nvme@lists.infradead.org References: <20201020090808.27702-1-lengchao@huawei.com> <9e1966b0-d471-0043-7fdb-e0f535571feb@grimberg.me> <3d5b96dd-4e0f-758a-4175-e69fef0b8c34@huawei.com> From: Sagi Grimberg Message-ID: Date: Tue, 20 Oct 2020 21:59:01 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <3d5b96dd-4e0f-758a-4175-e69fef0b8c34@huawei.com> Content-Language: en-US X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20201021_005907_262027_53D22D00 X-CRM114-Status: GOOD ( 19.39 ) X-BeenThere: linux-nvme@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: kbusch@kernel.org, axboe@fb.com, hch@lst.de Content-Transfer-Encoding: base64 Content-Type: text/plain; charset="utf-8"; Format="flowed" Sender: "Linux-nvme" Errors-To: linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org Cj4+PiBBdm9pZCByYWNlIGJldHdlZW4gdGltZSBvdXQgYW5kIHRlYXIgZG93biBmb3IgcmRtYSBh bmQgdGNwLgo+Pgo+PiBUaGlzIHBhdGNoc2V0IG92ZXJhbGwgbG9va3MgZ29vZCwgYnV0IHdlIHN0 aWxsIG5lZWQgdGhlIHBhdGNoIHRoYXQKPj4gYXZvaWRzIGRvdWJsZSBjb21wbGV0aW9uOgo+Pgo+ PiAtLSAKPj4gZGlmZiAtLWdpdCBhL2RyaXZlcnMvbnZtZS9ob3N0L3RjcC5jIGIvZHJpdmVycy9u dm1lL2hvc3QvdGNwLmMKPj4gaW5kZXggNjI5YjAyNTY4NWQxLi40NjQyOGZmMGIwZmMgMTAwNjQ0 Cj4+IC0tLSBhL2RyaXZlcnMvbnZtZS9ob3N0L3RjcC5jCj4+ICsrKyBiL2RyaXZlcnMvbnZtZS9o b3N0L3RjcC5jCj4+IEBAIC0yMTc1LDcgKzIxNzUsNyBAQCBzdGF0aWMgdm9pZCBudm1lX3RjcF9j b21wbGV0ZV90aW1lZF9vdXQoc3RydWN0IAo+PiByZXF1ZXN0ICpycSkKPj4gwqDCoMKgwqDCoMKg wqDCoCAvKiBmZW5jZSBvdGhlciBjb250ZXh0cyB0aGF0IG1heSBjb21wbGV0ZSB0aGUgY29tbWFu ZCAqLwo+PiDCoMKgwqDCoMKgwqDCoMKgIG11dGV4X2xvY2soJnRvX3RjcF9jdHJsKGN0cmwpLT50 ZWFyZG93bl9sb2NrKTsKPj4gwqDCoMKgwqDCoMKgwqDCoCBudm1lX3RjcF9zdG9wX3F1ZXVlKGN0 cmwsIG52bWVfdGNwX3F1ZXVlX2lkKHJlcS0+cXVldWUpKTsKPj4gLcKgwqDCoMKgwqDCoCBpZiAo IWJsa19tcV9yZXF1ZXN0X2NvbXBsZXRlZChycSkpIHsKPj4gK8KgwqDCoMKgwqDCoCBpZiAoYmxr X21xX3JlcXVlc3Rfc3RhcnRlZChycSkgJiYgCj4+ICFibGtfbXFfcmVxdWVzdF9jb21wbGV0ZWQo cnEpKSB7Cj4gWWVzLCB0aGlzIHBhdGNoIGlzIG5lZWQuIGFuZCBzYW1lbHkgZm9yIG52bWVfY2Fu Y2VsX3JlcXVlc3QuCj4gVGhpcyB3aWxsIGZpeCB0aGUgcmFjZSB3aXRoIGFzeW5jaHJvbm91cyBj b21wbGV0aW9uLgo+IAo+IGRpZmYgLS1naXQgYS9kcml2ZXJzL252bWUvaG9zdC9jb3JlLmMgYi9k cml2ZXJzL252bWUvaG9zdC9jb3JlLmMKPiBpbmRleCBlODVmNjMwNGVmZDcuLjFlODM4ZDk1MjA5 NiAxMDA2NDQKPiAtLS0gYS9kcml2ZXJzL252bWUvaG9zdC9jb3JlLmMKPiArKysgYi9kcml2ZXJz L252bWUvaG9zdC9jb3JlLmMKPiBAQCAtMzM4LDcgKzMzOCw3IEBAIGJvb2wgbnZtZV9jYW5jZWxf cmVxdWVzdChzdHJ1Y3QgcmVxdWVzdCAqcmVxLCB2b2lkIAo+ICpkYXRhLCBib29sIHJlc2VydmVk KQo+ICDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKg wqDCoMKgwqDCoCAiQ2FuY2VsbGluZyBJL08gJWQiLCByZXEtPnRhZyk7Cj4gCj4gIMKgwqDCoMKg wqDCoMKgIC8qIGRvbid0IGFib3J0IG9uZSBjb21wbGV0ZWQgcmVxdWVzdCAqLwo+IC3CoMKgwqDC oMKgwqAgaWYgKGJsa19tcV9yZXF1ZXN0X2NvbXBsZXRlZChyZXEpKQo+ICvCoMKgwqDCoMKgwqAg aWYgKGJsa19tcV9yZXF1ZXN0X2NvbXBsZXRlZChyZXEpIHx8ICFibGtfbXFfcmVxdWVzdF9zdGFy dGVkKHJxKSkKPiAgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgIHJldHVybiB0cnVlOwo+ IAo+ICDCoMKgwqDCoMKgwqDCoCBudm1lX3JlcShyZXEpLT5zdGF0dXMgPSBOVk1FX1NDX0hPU1Rf QUJPUlRFRF9DTUQ7CgpUaGlzIG9uZSBpcyB1bm5lZWRlZCBiZWNhdXNlIGJsa19tcV90YWdzZXRf YnVzeV9pdGVyIGNoZWNrcyB0aGF0IHRoZQpyZXF1ZXN0IGhhcyBzdGFydGVkLi4uCgpfX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpMaW51eC1udm1lIG1haWxp bmcgbGlzdApMaW51eC1udm1lQGxpc3RzLmluZnJhZGVhZC5vcmcKaHR0cDovL2xpc3RzLmluZnJh ZGVhZC5vcmcvbWFpbG1hbi9saXN0aW5mby9saW51eC1udm1lCg==