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=-13.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,MAILING_LIST_MULTI, NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=ham 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 EBED8C4338F for ; Tue, 3 Aug 2021 08:31:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CC13560524 for ; Tue, 3 Aug 2021 08:31:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234558AbhHCIbg (ORCPT ); Tue, 3 Aug 2021 04:31:36 -0400 Received: from mail.kernel.org ([198.145.29.99]:53610 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234423AbhHCIbf (ORCPT ); Tue, 3 Aug 2021 04:31:35 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id A916D60249; Tue, 3 Aug 2021 08:31:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1627979484; bh=kaFiBCMyltN5FpAyAo2YUnCHUvxKizCTit1xdiH0r2s=; h=Subject:To:Cc:References:From:Date:In-Reply-To:From; b=AZoz65hjBICpIy2wfNjGs7LizvOEARyYte6SP16y2QrehZtzH3KKtiw2MxojoO4fr ew9xBp/e8sTeSiVtvsRCtaNH8NzW2raH8lslTUU/nWBT/ardQQQoCHJQ8rAgt1yuou rxpNxJh4k6NrJT9kk5PVY60Fm36Gnc4QFk1bM+tZwGLSSvFfvJek1/FGbEjcAY9phZ 2cwnYd9rWbbV2TTGVJP2QrV51C1koS1FV3MhsRMS/U3vCvENty0aoNtwIXuZA9fkVZ 0fhbkLfspeE9zAxTyfEhQQIWtKh6Rg6r66oXzxZSt9GrCcg9CGnSXdQ3E5BJtPoTIM UkcR5if4FGv2g== Subject: Re: [f2fs-dev] [PATCH v3] f2fs: add sysfs node to control ra_pages for fadvise seq file To: Daeho Jeong , linux-kernel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, kernel-team@android.com Cc: Jaegeuk Kim , Daeho Jeong References: <20210803042245.2297259-1-daeho43@gmail.com> From: Chao Yu Message-ID: Date: Tue, 3 Aug 2021 16:31:22 +0800 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.12.0 MIME-Version: 1.0 In-Reply-To: <20210803042245.2297259-1-daeho43@gmail.com> 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 2021/8/3 12:22, Daeho Jeong wrote: > From: Daeho Jeong > > fadvise() allows the user to expand the readahead window to double with > POSIX_FADV_SEQUENTIAL, now. But, in some use cases, it is not that > sufficient and we need to meet the need in a restricted way. We can > control the multiplier value of bdi device readahead between 2 (default) > and 256 for POSIX_FADV_SEQUENTIAL advise option. > > Signed-off-by: Daeho Jeong I guess you can add below tag directly in v3. :) Reviewed-by: Chao Yu Thanks,