From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4B71BC433EF for ; Wed, 6 Apr 2022 02:27:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1443843AbiDFCVI (ORCPT ); Tue, 5 Apr 2022 22:21:08 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37172 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1457317AbiDEQDF (ORCPT ); Tue, 5 Apr 2022 12:03:05 -0400 Received: from mail-oi1-x22a.google.com (mail-oi1-x22a.google.com [IPv6:2607:f8b0:4864:20::22a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DFE24BCA3 for ; Tue, 5 Apr 2022 08:37:41 -0700 (PDT) Received: by mail-oi1-x22a.google.com with SMTP id k10so13818619oia.0 for ; Tue, 05 Apr 2022 08:37:41 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=lWlq9ObQo4afnrXzQf/uD0TPv521LBO3Zl1osjpId+M=; b=f9t+P/0nnhMmwaImxBnMDduZ729xpNc/xBpvNileyrBxML8g4Moo3kndoU5jpmb2a5 4fh5FoXwB7HD6uwV93e9N9r1wH5Jy0DdigdXnGrlFvHn7O/9E/dOvkSflgR1rMwwflFj mD8VWY4BqPEKWEOitvCFG9m9aoNlRuZ1vcwC04WwCwyrwFUAGRQr2YNEJy6tdmzbbkvn QrUKWj8qc6TTnXw8HSOEaEN98XpplACtEKRh/Jf3TR52nfTuqcpr+WLfpiRHDzEvsYKX wtpG0L/MTzDys2y/bE46rldPEvoDPMcHP0skYAdlheG8AgmWPQyhy5/zgWiTQofyT+9v VGwA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=lWlq9ObQo4afnrXzQf/uD0TPv521LBO3Zl1osjpId+M=; b=o12I8U0IfhJhqLKt4WoAZCpRHi6gD3q5eG5YJbJ9YormgczM/2IlI4eibO7QXvBRP2 pbUXDNMdZWaNe85TXwuRg+GoPyXndnl1ZzouvQHdz5asR8FqJ4ENYiS2LGVD+Wj+JhSx gZWDS8ZwKzT18ilwac9wZQWFuB2dkcgrt6KqGEHLFoHhH1PRD2qSj4qpUamySQbQqiy/ FS8fTUbmOUD794sWcN+woFttSwdMSc5jXS/KEp/PmjId1QEk3sy+wsQFab7GJs+KIILs 527Nl3UDHFgMexxQeZQJNwf8YZ3o0PhZiv1AAYeVnVytus31wiQ3prR5PRXV7T00O/79 IGNQ== X-Gm-Message-State: AOAM5316Ee3ceNujSzohTAcKccj8AdKGS7HiYjl1uP2rZNuVgAMZ6AKE vCDecEDH2MMPZthyJERCSjmKxrkQOc+dTwypAqs= X-Google-Smtp-Source: ABdhPJyOL6K6/rY7/NDmVIcAfJC8BhiebWpoBwDifTDaHUjUpPI1/7KVLBonGcmGfLfXSSX6WKnLdXdduFVvCgpq4us= X-Received: by 2002:a05:6808:17a2:b0:2f9:27da:923e with SMTP id bg34-20020a05680817a200b002f927da923emr1673063oib.15.1649173061240; Tue, 05 Apr 2022 08:37:41 -0700 (PDT) MIME-Version: 1.0 References: <20220401110310.611869-1-joshi.k@samsung.com> <20220404072152.GE444@lst.de> In-Reply-To: <20220404072152.GE444@lst.de> From: Kanchan Joshi Date: Tue, 5 Apr 2022 21:07:15 +0530 Message-ID: Subject: Re: [RFC 0/5] big-cqe based uring-passthru To: Christoph Hellwig Cc: Kanchan Joshi , Jens Axboe , io-uring@vger.kernel.org, linux-nvme@lists.infradead.org, Pavel Begunkov , Ming Lei , Luis Chamberlain , Pankaj Raghav , =?UTF-8?Q?Javier_Gonz=C3=A1lez?= , Anuj Gupta Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org On Mon, Apr 4, 2022 at 12:51 PM Christoph Hellwig wrote: > > I really can't get excited about the pdu thingy. Here is a patch > (on top of the series and the patch sent in reply to patch 4) that > does away with it and just adds a oob_user field to struct io_uring_cmd > to simplify the handling a fair bit: Fine. We discussed the tradeoff before, and the concern was generic-space reduction for other use-cases. But this is kernel-only change, so we can alter this if/when a new usecase requires more space. It seems fine to move ahead with what you proposed.