Received: by 2002:ac0:a5b6:0:0:0:0:0 with SMTP id m51-v6csp4542166imm; Wed, 30 May 2018 07:31:41 -0700 (PDT) X-Google-Smtp-Source: ADUXVKJjeTz4FyuxI9ssQ2gh+roZbpikO2ffpj6vf1KRvARu+1L9e9j+2G4pN4xiBJl0hYqzQ9Mz X-Received: by 2002:a17:902:229:: with SMTP id 38-v6mr3113535plc.384.1527690701585; Wed, 30 May 2018 07:31:41 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1527690701; cv=none; d=google.com; s=arc-20160816; b=UIwkViK1xoWOmYKYun45EpULUzmYRrNcW4nsfqbf0FzOpAQXhgzdVqZUrFD11YaAkO hTT5GqTt3eIYp06NglLcoqarYuy16ouL8tG9lXmwIniK4Nhsd+d37K0sQ7B73YvO8UF0 ATlgn9vAEr0MjlQR6zrtXizOA1APo908DWKMtj2tvP9iT7vrexeWFVSkCXFHSLNka7RE leDG6SlTarfdpok7JnRTxzMUIOflE+BpnXvMVOCG35danA2EMWE75bTFW3zo41iQ0q11 Ep3vsfGshONSWsOW6NaGft2XSFcbo3+yv7UCcRJKTQzqNAiz4T/bpTjyS6QsxrfmdX5C 8i+A== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:content-transfer-encoding :content-language:in-reply-to:mime-version:user-agent:date :message-id:from:references:to:subject:dkim-signature :arc-authentication-results; bh=BiUKRCBN4LqO74yfTLmEzHIBxY8YN0xiepOykJq7i+M=; b=QUTxs/3aqzeg9II1JQg8J70TMG9/gzSAFcK+ARF/Rk4lYpBiwJK991tlUpoxwjD34c d2ltfUe8D9mz+i4x5/WJC8zZ70fi6X+Vv4IHeXcjFDpfvxN0e5U2yp2p1ezMAws/PHtB 9SvwjzbzGWg9DYHybtsfwuKEKcD8Ylbo8n8z7e4iVD6F1FtmOW/+KYm+XryPfbQyzJu0 jQuSHiOd9zaBgTBJYn8VIPMRsundFpZAJqAlMw8BRYljo89Yhh7cpU1TRoTYYeOQpLpx u0nhSJQVIoCSmm7Y/siH1aoW9/gw/pJV9jPwNlNilSX4oFa6hRJHf+00QCEM7UBpw6rf MhXQ== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@kernel.org header.s=default header.b=mRWnSL4Y; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 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. [209.132.180.67]) by mx.google.com with ESMTP id f6-v6si8447915plm.448.2018.05.30.07.31.23; Wed, 30 May 2018 07:31:41 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@kernel.org header.s=default header.b=mRWnSL4Y; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 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 S1753453AbeE3Oab (ORCPT + 99 others); Wed, 30 May 2018 10:30:31 -0400 Received: from mail.kernel.org ([198.145.29.99]:33542 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753373AbeE3Oaa (ORCPT ); Wed, 30 May 2018 10:30:30 -0400 Received: from [192.168.0.101] (unknown [49.77.239.126]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 694EE2086A; Wed, 30 May 2018 14:30:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1527690630; bh=sWQZNE8I2zv4LypZGTYyAnNoXE8hB34zl219AT4H1WM=; h=Subject:To:References:From:Date:In-Reply-To:From; b=mRWnSL4YGAAqNlwGv/nh+iOoRVs8pi+Muh6zJlr//9IN4mzngsKZ9M94b8LHJutHZ ZIrqp0Tm3EByVCNt1cNdP7+YejsD9OLOLeHR6TWH/zz7H2mlk33hDO+iVpJTgv2GR7 B4BTuGsUP3kVqPpqdkiaST/aYmeOowDXRo+SIVXA= Subject: Re: [f2fs-dev] [PATCH] f2fs: issue discard commands proactively in high fs utilization To: Jaegeuk Kim , linux-kernel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net References: <20180529205048.39694-1-jaegeuk@kernel.org> From: Chao Yu Message-ID: Date: Wed, 30 May 2018 22:29:58 +0800 User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.8.0 MIME-Version: 1.0 In-Reply-To: <20180529205048.39694-1-jaegeuk@kernel.org> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2018/5/30 4:50, Jaegeuk Kim wrote: > In the high utilization like over 80%, we don't expect huge # of large discard > commands, but do many small pending discards which affects FTL GCs a lot. > Let's issue them in that case. > > Signed-off-by: Jaegeuk Kim Reviewed-by: Chao Yu Thanks,