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smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=pEn6x90k; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="pEn6x90k" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B7DE5C4CEEB; Tue, 22 Jul 2025 18:43:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1753209816; bh=ODfS0MriTe2BkDH3/8ZqCheu41IF2WEZjajJtc/1ijA=; h=Subject:From:To:Date:In-Reply-To:References:From; b=pEn6x90kpm4jfLj79Ydq2Ri2YVwlXSK5/juSPuM5j8BaR79ke+1rr/ekMg7PzeR0O 9cw1j/BHvOXijSIribUYbVUpT8VTQxgFc6kImKC5DCYpWQY/LerB8IYlu0hl0n1uSP 6fvpwk8j5GWN7S1mPQ94GveV8DlOCghMjezdNf3g5IAXHVtPk1eUNz/GesDQZZARHY P0VdCEfQgi5uEeT/wINItZgLFsyk7VF7eLxnhRelDINUrLw/o2J2ZXZFfz4iaMCAMc Frl/ELMkH6jdzV/aGW4ZaakiIdbtee76dtY5J/JtGI9PDXgW/QMX++Jk0WOCURCbUC vun2rc6rgX2kw== Message-ID: <76c35f2fc9386f3e77defe87375c4ad110618aaf.camel@kernel.org> Subject: Re: nfs client and io_uring zero copy receive From: Trond Myklebust To: Anton Gavriliuk , linux-nfs@vger.kernel.org Date: Tue, 22 Jul 2025 14:43:34 -0400 In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: base64 User-Agent: Evolution 3.56.2 (3.56.2-1.fc42) Precedence: bulk X-Mailing-List: linux-nfs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 T24gVHVlLCAyMDI1LTA3LTIyIGF0IDIxOjEwICswMzAwLCBBbnRvbiBHYXZyaWxpdWsgd3JvdGU6 Cj4gSGkKPiAKPiBJIGFtIHRyeWluZyB0byBleGNlZWQgMjAgR0IvcyBkb2luZyBzZXF1ZW50aWFs IHJlYWQgZnJvbSBhIHNpbmdsZQo+IGZpbGUKPiBvbiB0aGUgbmZzIGNsaWVudC4KPiAKPiBwZXJm IHRvcCBzaG93cyBleGNlc3NpdmUgbWVtY3B5IHVzYWdlOgo+IAo+IFNhbXBsZXM6IDIzN0sgb2Yg ZXZlbnQgJ2N5Y2xlczpQJywgNDAwMCBIeiwgRXZlbnQgY291bnQgKGFwcHJveC4pOgo+IDEyMDg3 MjczOTExMiBsb3N0OiAwLzAgZHJvcDogMC8wCj4gT3ZlcmhlYWTCoCBTaGFyZWQgT2JqZWN0wqDC oMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgIFN5bWJvbAo+IMKgIDIwLDU0 JcKgIFtrZXJuZWxdwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDC oMKgwqDCoCBba10gbWVtY3B5Cj4gwqDCoCA2LDUyJcKgIFtuZnNdwqDCoMKgwqDCoMKgwqDCoMKg wqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoCBba10gbmZzX2dlbmVyaWNf cGdfdGVzdAo+IMKgwqAgNSwxMiXCoCBbbmZzXcKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDC oMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqAgW2tdIG5mc19wYWdlX2dyb3VwX2xvY2sKPiDC oMKgIDQsOTIlwqAgW2tlcm5lbF3CoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDC oMKgwqDCoMKgwqDCoMKgIFtrXSBfY29weV90b19pdGVyCj4gwqDCoCA0LDc5JcKgIFtrZXJuZWxd wqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoCBba10g Z3JvX2xpc3RfcHJlcGFyZQo+IMKgwqAgMiw3NyXCoCBbbmZzXcKgwqDCoMKgwqDCoMKgwqDCoMKg wqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqAgW2tdIG5mc19jbGVhcl9yZXF1 ZXN0Cj4gwqDCoCAyLDEwJcKgIFtuZnNdwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDC oMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoCBba10KPiBfX25mc19wYWdlaW9fYWRkX3JlcXVlc3QK PiDCoMKgIDIsMDclwqAgW2tlcm5lbF3CoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKg wqDCoMKgwqDCoMKgwqDCoMKgIFtrXSBjaGVja19oZWFwX29iamVjdAo+IMKgwqAgMiwwMCXCoCBb a2VybmVsXcKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKg wqAgW2tdIF9fc2xhYl9mcmVlCj4gCj4gQ2FuIG5mcyBjbGllbnQgYmUgYWRvcHRlZCB0byB1c2Ug emVybyBjb3B5ID8sIGZvciBleGFtcGxlIGJ5IHVzaW5nCj4gaW9fdXJpbmcgemVybyBjb3B5IHJ4 Lgo+IAoKVGhlIGNsaWVudCBoYXMgbm8gaWRlYSBpbiB3aGljaCBvcmRlciB0aGUgc2VydmVyIHdp bGwgcmV0dXJuIHJlcGxpZXMgdG8KdGhlIFJQQyBjYWxscyBpdCBzZW5kcy4gU28gbm8sIGl0IGNh bid0IHF1ZXVlIHVwIHRob3NlIHJlcGx5IGJ1ZmZlcnMgaW4KYWR2YW5jZS4KClRoZSBvbmx5IHdh eSB5b3UgY2FuIGF2b2lkIG1lbW9yeSBjb3BpZXMgaGVyZSBpcyB0byB1c2UgUkRNQSB0byBhbGxv dwp0aGUgc2VydmVyIHRvIHdyaXRlIGl0cyByZXBsaWVzIGRpcmVjdGx5IGludG8gdGhlIGNvcnJl Y3QgY2xpZW50IHJlYWQKYnVmZmVycy4KCi0tIApUcm9uZCBNeWtsZWJ1c3QKTGludXggTkZTIGNs aWVudCBtYWludGFpbmVyLCBIYW1tZXJzcGFjZQp0cm9uZG15QGtlcm5lbC5vcmcsIHRyb25kLm15 a2xlYnVzdEBoYW1tZXJzcGFjZS5jb20K