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=-7.9 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,NICE_REPLY_A, 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 7D0ACC433F5 for ; Sat, 11 Sep 2021 23:45:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5F8316101D for ; Sat, 11 Sep 2021 23:45:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234394AbhIKXqo (ORCPT ); Sat, 11 Sep 2021 19:46:44 -0400 Received: from mail.kernel.org ([198.145.29.99]:43978 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232655AbhIKXqm (ORCPT ); Sat, 11 Sep 2021 19:46:42 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 4348861212; Sat, 11 Sep 2021 23:45:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1631403929; bh=R9YlOcuzzuAyv3ThEs6dM+K+vfoxM4pDPOUXDaUkkuQ=; h=Subject:To:Cc:References:From:Date:In-Reply-To:From; b=Q8IxT5dr2TeAtl0aZu9vsQu7yyYT+lIYc6bLY1U+f3wz/r1Rf2Mt4O74l47U5vtZR y8BfcUouXX6BQpCQSdVufrX63szUir719LYmXvW/zZ6Jj7Z0NLYjf/SrxFGcTfbntV WJXJWOKqHcD0MMoYdjc1bF8M68/JqKouFI4akm3TF9U2TkptrGsT6iGLnMUOQiW9hN X12pdJdUSbvmbNUUjhT+FseO5CT58kGVdH1oVCqR9iq/GVHWz7//ilTXP1gdaz175t EEvv9HIKSunif+MmTkIbO+S3JDRC/2KxdgQnZK7f5YoUPLIElMRv1VPHWLVsjZM4E9 On3YM8O4bqFAg== Subject: Re: [f2fs-dev] [PATCH v4] f2fs: introduce fragment allocation mode mount option To: Jaegeuk Kim , Daeho Jeong Cc: Daeho Jeong , kernel-team@android.com, linux-kernel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net References: <20210902172404.3517626-1-daeho43@gmail.com> From: Chao Yu Message-ID: <9f4a2954-e8c9-abc5-5df4-a7cec53433a3@kernel.org> Date: Sun, 12 Sep 2021 07:45:26 +0800 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.13.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2021/9/11 7:13, Jaegeuk Kim wrote: > Wait. Why do we need to add so many options here? I was expecting to see > performance difference when getting random segments or random blocks as > an extreme case. I don't get the point why we need the middle of those cases. I guess we can simply the aging test procedure of filesystem by changing a bit based on this patch. See comments in below thread. https://lore.kernel.org/lkml/425daf77-8020-26ce-dc9f-019d9a881b78@kernel.org/ Thanks,