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 X-Spam-Level: X-Spam-Status: No, score=-2.2 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C307CC55185 for ; Sat, 25 Apr 2020 15:45:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9959F20644 for ; Sat, 25 Apr 2020 15:45:37 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=kernel-dk.20150623.gappssmtp.com header.i=@kernel-dk.20150623.gappssmtp.com header.b="wA6w0yXn" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726076AbgDYPph (ORCPT ); Sat, 25 Apr 2020 11:45:37 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52560 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1726108AbgDYPpg (ORCPT ); Sat, 25 Apr 2020 11:45:36 -0400 Received: from mail-pj1-x1034.google.com (mail-pj1-x1034.google.com [IPv6:2607:f8b0:4864:20::1034]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8AE7EC09B04B for ; Sat, 25 Apr 2020 08:45:36 -0700 (PDT) Received: by mail-pj1-x1034.google.com with SMTP id hi11so5176237pjb.3 for ; Sat, 25 Apr 2020 08:45:36 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel-dk.20150623.gappssmtp.com; s=20150623; h=subject:to:cc:references:from:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=WbXqUvy6Zx4jWra7/mKAUkU8JyHGv+EMw9mv1e/ZXrw=; b=wA6w0yXnoRQod/x9kLNhbiBia/FHpGoN4xQViR4JBH8y01Ngws6t68NvQVilPaLZx2 xJ8vIdznCP+MwPFk8khyg9Dnz+lLcCtj3agOmaFX1EpIyhoxTy4HLil0x6mua7/yvGMt uS2/H+3/kBL6nnbMDD0r515N0pxGXyEcLW1+xvH+xm0sJyoEHnshgNhAjnpoCmXDZiSe qLlNf1VLRJmTlrMx33woZMj9ZerpbqLYpTsOeEJcGnm7SyM3wd4ynvkjiZsQK9fNgDKW o3bV3ow/MslKyJPLXYeG4o2M5aiMMJ2iR9uPTQlp17n66iJH3swYfMTzxnJ8aSiFbP3a smJA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=WbXqUvy6Zx4jWra7/mKAUkU8JyHGv+EMw9mv1e/ZXrw=; b=i4tu2fIBjBvYZ9QvLYUU02qudHBorjdaNYbwk1R7n40vkKnqf+bZgbK130wwqnGZsE P/rVfxWyKvB7HEvmIdTrEga6B3DOM0ZpkC1FSwMqmhOYSfaeldmkzaPseGzlzKbUGGAz oGtay+/KaQUTOgu38hqu+qn6yf4UPaq7c8+26CjlEdsMxDzCVVFaJ2SLyxeN+8Go8B3a HbNk983wLGY6+sLFBPrQ0d72qW40o64Dq95ibzRborptaKOKhZzQxWS36cNMzMDmBFMv ZXUMe3MCFRR7fHOcwRt4lTXnXksO9NWKXOdeO6mkNoT0Fes2FHrHMVUxgR83nM6yFmE9 ID1Q== X-Gm-Message-State: AGi0Pub6xoz+RWYcJTUgIqW+loQHYM8vg5DbNfUD9LMnZXLdqljwC7p3 oa2WEJL7XfOywCo7TOhhiFxbp5rA2OOy4g== X-Google-Smtp-Source: APiQypIlBZtsrMImuPudY2tg2Rzjk77JhIq2anQwrD+xO4v3/vehSA9N2sPj2aHncEr8sTNiiKhqHQ== X-Received: by 2002:a17:902:59cc:: with SMTP id d12mr7704421plj.237.1587829535828; Sat, 25 Apr 2020 08:45:35 -0700 (PDT) Received: from [192.168.1.188] ([66.219.217.145]) by smtp.gmail.com with ESMTPSA id f21sm8454701pfn.71.2020.04.25.08.45.34 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sat, 25 Apr 2020 08:45:35 -0700 (PDT) Subject: Re: avoid the ->make_request_fn indirect for blk-mq drivers To: Christoph Hellwig Cc: dm-devel@redhat.com, linux-bcache@vger.kernel.org, linux-block@vger.kernel.org References: <20200425075336.721021-1-hch@lst.de> From: Jens Axboe Message-ID: <98cd7aac-e4ee-8de0-e7aa-0d3e1a2b20e0@kernel.dk> Date: Sat, 25 Apr 2020 09:45:34 -0600 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.7.0 MIME-Version: 1.0 In-Reply-To: <20200425075336.721021-1-hch@lst.de> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org On 4/25/20 1:53 AM, Christoph Hellwig wrote: > Hi Jens, > > this small series avoids an indirect call for every submitted bio that > eventually ends up being handled by blk-mq drivers. Let me know what > you think. I like it, I've been pondering something like this for a bit, but I like the simplicity of this one and changing it so that only non-regular make_request_fn is set. I'll apply this. -- Jens Axboe