Received: by 2002:a05:6a10:6d25:0:0:0:0 with SMTP id gq37csp647958pxb; Sat, 11 Sep 2021 16:54:00 -0700 (PDT) X-Google-Smtp-Source: ABdhPJz3f2Yi70y7a/JF6EuTZOYqf0H7Ooedm/T3tixdf76wq+TkaNA20MLmjnLWqYjLAeEa8baT X-Received: by 2002:a05:6638:dc8:: with SMTP id m8mr3618812jaj.93.1631404440624; Sat, 11 Sep 2021 16:54:00 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1631404440; cv=none; d=google.com; s=arc-20160816; b=M09R73qISB9pHozC5a9J3hc3V4qXA2rZ07lZOmXFdSiigG44KYzAGJahiaQhGHab9x ihw/7x3PKGR40n49j4XpUsEfRsDwAUMpVSvLdY4NdtHXvD5fLU0tH6mPIHDiPrWZS6fs 1aScyrpvBtimx6KMey7KX3gJHagY1AnvLeuhfy7VlU2ImQ00dqQX8bWUFtU31xLzLdVX WyCWZDtkDZaBqHbaaYhnxlx5TKQgFL7UysNkdL9UrHFoagmfN9fB2cT0KFw6SufibOxL Y6DbFARyI6ZJ5tTzTQv2jA4fN46/o87MAoVmeS8z88nSMFmR9chCfMmfIyFxvCV197uu Dqkw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:content-language :in-reply-to:mime-version:user-agent:date:message-id:from:references :cc:to:subject:dkim-signature; bh=R9YlOcuzzuAyv3ThEs6dM+K+vfoxM4pDPOUXDaUkkuQ=; b=iw7Tk9i6hA4lAV20p/iblQM7+Ru++8Qb3FoB4D9/5PDIYRZPRFePVnAC3nTZjsxhjG UMaNof7PF7SkGEA44ziyS5nMjubbZnJSvaRVxqxyPEQpuPz/W3pgKZITUK8/BDatA2uI F8s4cfOB6xi+JRAf5CG3MPe/C5Q6ET+GCkyL8UUza9qGwp87g+Z9bY6SUS/iT6KxxtOP nvfQrOaIQc5UINhqEx4O2vlZe6Cbc3heF7S8dxIAmp1lLpfakfrZ19Fa0BsHUrDyCY8s W5Eh9PQnBT9S8tRhr0owcgUVRW4QIfGrCbaycpvtZWxD+7pcE4uQeOLXntrsDZ9lOMzs iNDA== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@kernel.org header.s=k20201202 header.b=Q8IxT5dr; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id u3si2940456iom.82.2021.09.11.16.53.48; Sat, 11 Sep 2021 16:54:00 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=pass header.i=@kernel.org header.s=k20201202 header.b=Q8IxT5dr; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234320AbhIKXqn (ORCPT + 99 others); Sat, 11 Sep 2021 19:46:43 -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,