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([2601:647:4802:9070:68d6:3fd5:5a8b:9959]) by smtp.gmail.com with ESMTPSA id c16sm9788515wrx.31.2020.10.08.16.00.31 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 08 Oct 2020 16:00:35 -0700 (PDT) Subject: Re: [PATCH net-next RFC v1 06/10] nvme-tcp: Add DDP data-path From: Sagi Grimberg To: 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> Message-ID: <24ea956e-40a2-8b7b-cf8a-b604e7cd5644@grimberg.me> Date: Thu, 8 Oct 2020 16:00:30 -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: <5a23d221-fd3e-5802-ce68-7edec55068bb@grimberg.me> Content-Language: en-US X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20201008_190039_611242_81C14A19 X-CRM114-Status: GOOD ( 15.41 ) 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-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+IMKgIHN0YXRpYwo+PiDCoCBpbnQgbnZtZV90Y3Bfb2ZmbG9hZF9zb2NrZXQoc3RydWN0IG52 bWVfdGNwX3F1ZXVlICpxdWV1ZSwKPj4gwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDC oCBzdHJ1Y3QgbnZtZV90Y3BfY29uZmlnICpjb25maWcpCj4+IEBAIC02MzAsNiArNzIwLDcgQEAg c3RhdGljIHZvaWQgbnZtZV90Y3BfZXJyb3JfcmVjb3Zlcnkoc3RydWN0IAo+PiBudm1lX2N0cmwg KmN0cmwpCj4+IMKgIHN0YXRpYyBpbnQgbnZtZV90Y3BfcHJvY2Vzc19udm1lX2NxZShzdHJ1Y3Qg bnZtZV90Y3BfcXVldWUgKnF1ZXVlLAo+PiDCoMKgwqDCoMKgwqDCoMKgwqAgc3RydWN0IG52bWVf Y29tcGxldGlvbiAqY3FlKQo+PiDCoCB7Cj4+ICvCoMKgwqAgc3RydWN0IG52bWVfdGNwX3JlcXVl c3QgKnJlcTsKPj4gwqDCoMKgwqDCoCBzdHJ1Y3QgcmVxdWVzdCAqcnE7Cj4+IMKgwqDCoMKgwqAg cnEgPSBibGtfbXFfdGFnX3RvX3JxKG52bWVfdGNwX3RhZ3NldChxdWV1ZSksIGNxZS0+Y29tbWFu ZF9pZCk7Cj4+IEBAIC02NDEsOCArNzMyLDE1IEBAIHN0YXRpYyBpbnQgbnZtZV90Y3BfcHJvY2Vz c19udm1lX2NxZShzdHJ1Y3QgCj4+IG52bWVfdGNwX3F1ZXVlICpxdWV1ZSwKPj4gwqDCoMKgwqDC oMKgwqDCoMKgIHJldHVybiAtRUlOVkFMOwo+PiDCoMKgwqDCoMKgIH0KPj4gLcKgwqDCoCBpZiAo IW52bWVfdHJ5X2NvbXBsZXRlX3JlcShycSwgY3FlLT5zdGF0dXMsIGNxZS0+cmVzdWx0KSkKPj4g LcKgwqDCoMKgwqDCoMKgIG52bWVfY29tcGxldGVfcnEocnEpOwo+PiArwqDCoMKgIHJlcSA9IGJs a19tcV9ycV90b19wZHUocnEpOwo+PiArwqDCoMKgIGlmIChyZXEtPm9mZmxvYWRlZCkgewo+PiAr wqDCoMKgwqDCoMKgwqAgcmVxLT5zdGF0dXMgPSBjcWUtPnN0YXR1czsKPj4gK8KgwqDCoMKgwqDC oMKgIHJlcS0+cmVzdWx0ID0gY3FlLT5yZXN1bHQ7Cj4+ICvCoMKgwqDCoMKgwqDCoCBudm1lX3Rj cF90ZWFyZG93bl9kZHAocXVldWUsIGNxZS0+Y29tbWFuZF9pZCwgcnEpOwo+PiArwqDCoMKgIH0g ZWxzZSB7Cj4+ICvCoMKgwqDCoMKgwqDCoCBpZiAoIW52bWVfdHJ5X2NvbXBsZXRlX3JlcShycSwg Y3FlLT5zdGF0dXMsIGNxZS0+cmVzdWx0KSkKPj4gK8KgwqDCoMKgwqDCoMKgwqDCoMKgwqAgbnZt ZV9jb21wbGV0ZV9ycShycSk7Cj4+ICvCoMKgwqAgfQoKT2ggZm9yZ290IHRvIGFzaywKCldlIGhh dmUgcGxhY2VzIGluIHRoZSBkcml2ZXIgdGhhdCB3ZSBtYXkgY29tcGxldGUgKGNhbmNlbCkgb25l Cm9yIG1vcmUgcmVxdWVzdHMgZnJvbSB0aGUgZXJyb3IgcmVjb3Zlcnkgb3IgdGltZW91dCBmbG93 LiBXZQpmaXJzdCBwcmV2ZW50IGZ1dHVyZSBpbmNvbWluZyBSWCBvbiB0aGUgc29ja2V0IHN1Y2gg dGhhdCB3ZQpjYW4gc2FmZWx5IGNhbmNlbCByZXF1ZXN0cy4gVGhpcyBtYXkgYnJlYWsgd2l0aCB0 aGUgZGVmZXJyZWQKY29tcGxldGlvbiBpbiBkZHBfdGVhcmRvd25fZG9uZS4KCklmIEkgaGF2ZSBh IHJlcXVlc3QgdGhhdCBpcyB3YWl0aW5nIGZvciBkZHBfdGVhcmRvd25fZG9uZSBkbwpJIGhhdmUg YSB3YXkgdG8gdGVsbCB0aGUgSFcgdG8gbmV2ZXIgY2FsbCBkZHBfdGVhcmRvd25fZG9uZQpvbiBh IHNwZWNpZmljIHNvY2tldD8KCklmIHNvIHRoZSBwbGFjZSB0byBpcyBpbiBudm1lX3RjcF9zdG9w X3F1ZXVlLgoKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18K TGludXgtbnZtZSBtYWlsaW5nIGxpc3QKTGludXgtbnZtZUBsaXN0cy5pbmZyYWRlYWQub3JnCmh0 dHA6Ly9saXN0cy5pbmZyYWRlYWQub3JnL21haWxtYW4vbGlzdGluZm8vbGludXgtbnZtZQo=