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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id E3BDAC433FE for ; Wed, 23 Nov 2022 15:13:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238404AbiKWPNL (ORCPT ); Wed, 23 Nov 2022 10:13:11 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49356 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238417AbiKWPM7 (ORCPT ); Wed, 23 Nov 2022 10:12:59 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A81925F85C for ; Wed, 23 Nov 2022 07:12:58 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 6511FB820BF for ; Wed, 23 Nov 2022 15:12:57 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id C589AC433D6; Wed, 23 Nov 2022 15:12:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1669216376; bh=yOULMtM0+KTy5LieyRbQAWfjtQdPuaw3HboADHL+tcs=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=sMCqNymJxYM7LJZnkYSsMm0pvmOet0Bly0terUqPs6d/6rwXk4qNjqr5pK0jGWLdh rPQRdeGafDEounT3RlYYaor5lL3rC3qERosoVGqQirdwBObE6pVcnLNZlRN1EuEin7 pbmJ6/fTBtQ7jdGdL0bHNGjqEsN+HkmOGfygM08k367XwdNtdzDwxdGZywBbWxA1c2 SXtBgmMba3C9aMJkbNBHnsCneixzc2RYbVeK3LS9nbreuqTDd9NlY2tWvZn9yRhd4a HNwvja0CbmkL6FX2pbM8PF1dILO0SlryUUhbFf+dlHkPYQ3d3HvG09GaCNzz8c9ORR KKG+6y3ClB+VA== Message-ID: Date: Wed, 23 Nov 2022 23:12:53 +0800 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:102.0) Gecko/20100101 Thunderbird/102.5.0 Subject: Re: [PATCH] f2fs: remove useless io_aware_gran variable Content-Language: en-US To: Yuwei Guan , jaegeuk@kernel.org Cc: linux-f2fs-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org, Yuwei.Guan@zeekrlife.com References: <20221116131035.1056523-1-Yuwei.Guan@zeekrlife.com> From: Chao Yu In-Reply-To: <20221116131035.1056523-1-Yuwei.Guan@zeekrlife.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2022/11/16 21:10, Yuwei Guan wrote: > This 'io_aware_gran' is initialized as MAX_PLIST_NUM in > __init_discard_policy(), and use as 'i < dpolicy->io_aware_gran' > in __issue_discard_cmd(), but 'i < dpolicy->io_aware_gran' is > true always, so remvoe this variable. I guess we can export it via sysfs for better configuation? Thanks, > > Signed-off-by: Yuwei Guan > --- > fs/f2fs/f2fs.h | 1 - > fs/f2fs/segment.c | 4 +--- > 2 files changed, 1 insertion(+), 4 deletions(-) > > diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h > index dedac413bf64..ced8a5b226b5 100644 > --- a/fs/f2fs/f2fs.h > +++ b/fs/f2fs/f2fs.h > @@ -388,7 +388,6 @@ struct discard_policy { > unsigned int mid_interval; /* used for device busy */ > unsigned int max_interval; /* used for candidates not exist */ > unsigned int max_requests; /* # of discards issued per round */ > - unsigned int io_aware_gran; /* minimum granularity discard not be aware of I/O */ > bool io_aware; /* issue discard in idle time */ > bool sync; /* submit discard with REQ_SYNC flag */ > bool ordered; /* issue discard by lba order */ > diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c > index 8b0b76550578..1cc41a65a645 100644 > --- a/fs/f2fs/segment.c > +++ b/fs/f2fs/segment.c > @@ -1059,7 +1059,6 @@ static void __init_discard_policy(struct f2fs_sb_info *sbi, > dpolicy->granularity = granularity; > > dpolicy->max_requests = dcc->max_discard_request; > - dpolicy->io_aware_gran = MAX_PLIST_NUM; > dpolicy->timeout = false; > > if (discard_type == DPOLICY_BG) { > @@ -1483,8 +1482,7 @@ static int __issue_discard_cmd(struct f2fs_sb_info *sbi, > f2fs_time_over(sbi, UMOUNT_DISCARD_TIMEOUT)) > break; > > - if (dpolicy->io_aware && i < dpolicy->io_aware_gran && > - !is_idle(sbi, DISCARD_TIME)) { > + if (dpolicy->io_aware && !is_idle(sbi, DISCARD_TIME)) { > io_interrupted = true; > break; > }