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Sun, 08 Nov 2020 05:59:05 -0800 (PST) Subject: Re: [PATCH net-next RFC v1 06/10] nvme-tcp: Add DDP data-path To: Sagi Grimberg , Boris Pismenny , kuba@kernel.org, davem@davemloft.net, saeedm@nvidia.com, hch@lst.de, axboe@fb.com, kbusch@kernel.org, viro@zeniv.linux.org.uk, edumazet@google.com References: <20200930162010.21610-1-borisp@mellanox.com> <20200930162010.21610-7-borisp@mellanox.com> <5a23d221-fd3e-5802-ce68-7edec55068bb@grimberg.me> <24ea956e-40a2-8b7b-cf8a-b604e7cd5644@grimberg.me> From: Boris Pismenny Message-ID: <6551237d-104d-1e3f-00a7-a3b479786344@gmail.com> Date: Sun, 8 Nov 2020 15:59:01 +0200 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.4.0 MIME-Version: 1.0 In-Reply-To: <24ea956e-40a2-8b7b-cf8a-b604e7cd5644@grimberg.me> Content-Language: en-US X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20201108_085907_713227_18EA47EB X-CRM114-Status: GOOD ( 16.65 ) 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: Yoray Zack , Ben Ben-Ishay , boris.pismenny@gmail.com, linux-nvme@lists.infradead.org, netdev@vger.kernel.org, Or Gerlitz Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "Linux-nvme" Errors-To: linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org CgpPbiAwOS8xMC8yMDIwIDI6MDAsIFNhZ2kgR3JpbWJlcmcgd3JvdGU6Cj4+PiDCoCBzdGF0aWMK Pj4+IMKgIGludCBudm1lX3RjcF9vZmZsb2FkX3NvY2tldChzdHJ1Y3QgbnZtZV90Y3BfcXVldWUg KnF1ZXVlLAo+Pj4gwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoCBzdHJ1Y3QgbnZt ZV90Y3BfY29uZmlnICpjb25maWcpCj4+PiBAQCAtNjMwLDYgKzcyMCw3IEBAIHN0YXRpYyB2b2lk IG52bWVfdGNwX2Vycm9yX3JlY292ZXJ5KHN0cnVjdCAKPj4+IG52bWVfY3RybCAqY3RybCkKPj4+ IMKgIHN0YXRpYyBpbnQgbnZtZV90Y3BfcHJvY2Vzc19udm1lX2NxZShzdHJ1Y3QgbnZtZV90Y3Bf cXVldWUgKnF1ZXVlLAo+Pj4gwqDCoMKgwqDCoMKgwqDCoMKgIHN0cnVjdCBudm1lX2NvbXBsZXRp b24gKmNxZSkKPj4+IMKgIHsKPj4+ICvCoMKgwqAgc3RydWN0IG52bWVfdGNwX3JlcXVlc3QgKnJl cTsKPj4+IMKgwqDCoMKgwqAgc3RydWN0IHJlcXVlc3QgKnJxOwo+Pj4gwqDCoMKgwqDCoCBycSA9 IGJsa19tcV90YWdfdG9fcnEobnZtZV90Y3BfdGFnc2V0KHF1ZXVlKSwgY3FlLT5jb21tYW5kX2lk KTsKPj4+IEBAIC02NDEsOCArNzMyLDE1IEBAIHN0YXRpYyBpbnQgbnZtZV90Y3BfcHJvY2Vzc19u dm1lX2NxZShzdHJ1Y3QgCj4+PiBudm1lX3RjcF9xdWV1ZSAqcXVldWUsCj4+PiDCoMKgwqDCoMKg wqDCoMKgwqAgcmV0dXJuIC1FSU5WQUw7Cj4+PiDCoMKgwqDCoMKgIH0KPj4+IC3CoMKgwqAgaWYg KCFudm1lX3RyeV9jb21wbGV0ZV9yZXEocnEsIGNxZS0+c3RhdHVzLCBjcWUtPnJlc3VsdCkpCj4+ PiAtwqDCoMKgwqDCoMKgwqAgbnZtZV9jb21wbGV0ZV9ycShycSk7Cj4+PiArwqDCoMKgIHJlcSA9 IGJsa19tcV9ycV90b19wZHUocnEpOwo+Pj4gK8KgwqDCoCBpZiAocmVxLT5vZmZsb2FkZWQpIHsK Pj4+ICvCoMKgwqDCoMKgwqDCoCByZXEtPnN0YXR1cyA9IGNxZS0+c3RhdHVzOwo+Pj4gK8KgwqDC oMKgwqDCoMKgIHJlcS0+cmVzdWx0ID0gY3FlLT5yZXN1bHQ7Cj4+PiArwqDCoMKgwqDCoMKgwqAg bnZtZV90Y3BfdGVhcmRvd25fZGRwKHF1ZXVlLCBjcWUtPmNvbW1hbmRfaWQsIHJxKTsKPj4+ICvC oMKgwqAgfSBlbHNlIHsKPj4+ICvCoMKgwqDCoMKgwqDCoCBpZiAoIW52bWVfdHJ5X2NvbXBsZXRl X3JlcShycSwgY3FlLT5zdGF0dXMsIGNxZS0+cmVzdWx0KSkKPj4+ICvCoMKgwqDCoMKgwqDCoMKg wqDCoMKgIG52bWVfY29tcGxldGVfcnEocnEpOwo+Pj4gK8KgwqDCoCB9Cj4gT2ggZm9yZ290IHRv IGFzaywKPgo+IFdlIGhhdmUgcGxhY2VzIGluIHRoZSBkcml2ZXIgdGhhdCB3ZSBtYXkgY29tcGxl dGUgKGNhbmNlbCkgb25lCj4gb3IgbW9yZSByZXF1ZXN0cyBmcm9tIHRoZSBlcnJvciByZWNvdmVy eSBvciB0aW1lb3V0IGZsb3cuIFdlCj4gZmlyc3QgcHJldmVudCBmdXR1cmUgaW5jb21pbmcgUlgg b24gdGhlIHNvY2tldCBzdWNoIHRoYXQgd2UKPiBjYW4gc2FmZWx5IGNhbmNlbCByZXF1ZXN0cy4g VGhpcyBtYXkgYnJlYWsgd2l0aCB0aGUgZGVmZXJyZWQKPiBjb21wbGV0aW9uIGluIGRkcF90ZWFy ZG93bl9kb25lLgo+Cj4gSWYgSSBoYXZlIGEgcmVxdWVzdCB0aGF0IGlzIHdhaXRpbmcgZm9yIGRk cF90ZWFyZG93bl9kb25lIGRvCj4gSSBoYXZlIGEgd2F5IHRvIHRlbGwgdGhlIEhXIHRvIG5ldmVy IGNhbGwgZGRwX3RlYXJkb3duX2RvbmUKPiBvbiBhIHNwZWNpZmljIHNvY2tldD8KPgo+IElmIHNv IHRoZSBwbGFjZSB0byBpcyBpbiBudm1lX3RjcF9zdG9wX3F1ZXVlLgpJbnRlcmVzdGluZyBhbmQg aW5kZWVkLCBpdCBpcyBhIHByb2JsZW0gdGhhdCB3ZSBoYXZlbid0IGNvbnNpZGVyZWQuCgoKX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KTGludXgtbnZtZSBt YWlsaW5nIGxpc3QKTGludXgtbnZtZUBsaXN0cy5pbmZyYWRlYWQub3JnCmh0dHA6Ly9saXN0cy5p bmZyYWRlYWQub3JnL21haWxtYW4vbGlzdGluZm8vbGludXgtbnZtZQo=