From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9139B2E628 for ; Mon, 10 Feb 2025 09:59:32 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739181572; cv=none; b=L60VHBQfi7LUYDHq/EICACip0PvPmKxk39xJqdwIEIID/wOlCL8dSo/JG6rOgLs4fpWB2ZOLL76B+fpKQKGKqEfj4ckdCVmlmsognV6U6BIEKfyGoB4iVNcqNDmCuDtqXFX19Na96LKLl7OS5MhGI9ooUQ/shIykb/cRBhXq1K4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739181572; c=relaxed/simple; bh=aTtvb1f4dMtTpn5Laz2mDNmKptpgk8JKwnk9yB+3Mqs=; h=Message-ID:Date:MIME-Version:Cc:Subject:To:References:From: In-Reply-To:Content-Type; b=J5aLoFUy66BTSAnFXUukK7Ho8sXkJs5I47RunvD1GE/QwvrlXdrV5UPiFO3deoA/JJwfUDjCSPRf0icRbDInl2Z3PuiG1P5UVDKT1Dm4OAT0xwghJJdGphbrPcK+w7ejgaqTgQJNmvr60qv6C+uNlMImrxYoKaHrNXtIuqwRryA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=HApETyr2; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="HApETyr2" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4C304C4CED1; Mon, 10 Feb 2025 09:59:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1739181572; bh=aTtvb1f4dMtTpn5Laz2mDNmKptpgk8JKwnk9yB+3Mqs=; h=Date:Cc:Subject:To:References:From:In-Reply-To:From; b=HApETyr27GOJHy51a/6b+lne7KRLt2svbWkGcav0KLhq5MNGmbLRllEjaYuspNYNT h2JAHSNFBOpMDrYEFQgiWLSVuo9P7/fTlPGlEhFWEPW0mNLom5us9EJJ7COtvVvA0M xefqD5rvHCbhlGAnlAGsslQD+0YH0gT/Oy3KDlnmaSdWgHlgky3v85b5oe6tUQo6wa h5qZnSS4xZfTW1wb6rOcjaW7ayJOufzEzCuPJOO+ubFFINStO0WxvXS2ifRFrLqXNa nQNdbH4wg/rZwWugf08QeGUlumaYZpSvwK+w1v+0tXiAGoBWya6zCdvXFFvYGlp4d8 UGjsSp6yFGZ8w== Message-ID: <61e5cacc-907d-4b86-a26a-63a31cdadd61@kernel.org> Date: Mon, 10 Feb 2025 17:59:28 +0800 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Cc: chao@kernel.org Subject: Re: [f2fs-dev] [PATCH 2/2 v2] f2fs: add a sysfs entry to request donate file-backed pages To: Jaegeuk Kim , linux-kernel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net References: <20250131222914.1634961-1-jaegeuk@kernel.org> <20250131222914.1634961-3-jaegeuk@kernel.org> Content-Language: en-US From: Chao Yu In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 2/8/25 00:28, Jaegeuk Kim via Linux-f2fs-devel wrote: > 1. ioctl(fd1, F2FS_IOC_DONATE_RANGE, {0,3}); > 2. ioctl(fd2, F2FS_IOC_DONATE_RANGE, {1,2}); > 3. ioctl(fd3, F2FS_IOC_DONATE_RANGE, {3,1}); > 4. echo 1024 > /sys/fs/f2fs/tuning/reclaim_caches_kb > > This gives a way to reclaim file-backed pages by iterating all f2fs mounts until > reclaiming 1MB page cache ranges, registered by #1, #2, and #3. > > 5. cat /sys/fs/f2fs/tuning/reclaim_caches_kb > -> gives total number of registered file ranges. > > Signed-off-by: Jaegeuk Kim Reviewed-by: Chao Yu Thanks,