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 C58E9C433F5 for ; Tue, 19 Apr 2022 22:47:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1350306AbiDSWul (ORCPT ); Tue, 19 Apr 2022 18:50:41 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44926 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231893AbiDSWuk (ORCPT ); Tue, 19 Apr 2022 18:50:40 -0400 Received: from sin.source.kernel.org (sin.source.kernel.org [145.40.73.55]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7B8ED27CF4 for ; Tue, 19 Apr 2022 15:47:56 -0700 (PDT) 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 sin.source.kernel.org (Postfix) with ESMTPS id D6941CE1B13 for ; Tue, 19 Apr 2022 22:47:54 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 07842C385A7; Tue, 19 Apr 2022 22:47:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1650408473; bh=dPPIfXbZmC5wjSWim42Hh9CV6QDmZuiHOOhATFqi7iE=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=qHu9LbfiE7riITqbGfeNYlSsHrfTenqTgAHnD3GDcRA+HNIswG89wNc2yNcW2Dazk P6sQ4sBTupkxO/Grto42/r5M2DL4CV8CIWthm1KD8gqHgqaT26Eb6R7ecjlGzARJVO 9WAYKmU64t5CMIc1Yg+tN6FRDrTvM2Xe8srM4f5wliRq2Zbph+AwP/ij6rZyFCvj3M 0m31D2I7bJOV+oFxA53LmiAWFJp/buyuRroJd2+XFhKw521dIF5UxQV2B9yZ0cp9Tv V/85kznCiJSaOvBgDuwgGhloYoknOOBPB0f2ems+gKUMeY03+aOtHcnumAgAA8J2UI o7TYi9Sm5Kg1Q== Date: Tue, 19 Apr 2022 15:47:51 -0700 From: Jaegeuk Kim To: Chao Yu Cc: linux-kernel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net Subject: Re: [f2fs-dev] [PATCH 2/2] f2fs: keep io_flags to avoid IO split due to different op_flags in two fio holders Message-ID: References: <20220413154920.2024872-1-jaegeuk@kernel.org> <20220413154920.2024872-2-jaegeuk@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 04/17, Chao Yu wrote: > On 2022/4/13 23:49, Jaegeuk Kim wrote: > > Let's attach io_flags to bio only, so that we can merge IOs given original > > io_flags only. > > > > Fixes: 64bf0eef0171 ("f2fs: pass the bio operation to bio_alloc_bioset") > > Nice catch. > > Wasn't this bug introduced by: I don't think so. > > commit da9953b729c1 ("f2fs: introduce sysfs/data_io_flag to attach REQ_META/FUA") > > static void __attach_data_io_flag(struct f2fs_io_info *fio) > { > ... > if ((1 << fio->temp) & meta_flag) > fio->op_flags |= REQ_META; > if ((1 << fio->temp) & fua_flag) > fio->op_flags |= REQ_FUA; > ... > > Thanks, > > > Signed-off-by: Jaegeuk Kim > > --- > > fs/f2fs/data.c | 33 +++++++++++++++++++++------------ > > 1 file changed, 21 insertions(+), 12 deletions(-) > > > > diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c > > index acc523f893ba..fcf0daa386de 100644 > > --- a/fs/f2fs/data.c > > +++ b/fs/f2fs/data.c > > @@ -387,11 +387,23 @@ int f2fs_target_device_index(struct f2fs_sb_info *sbi, block_t blkaddr) > > return 0; > > } > > -static void __attach_io_flag(struct f2fs_io_info *fio, unsigned int io_flag) > > +static unsigned int f2fs_io_flags(struct f2fs_io_info *fio) > > { > > unsigned int temp_mask = (1 << NR_TEMP_TYPE) - 1; > > - unsigned int fua_flag = io_flag & temp_mask; > > - unsigned int meta_flag = (io_flag >> NR_TEMP_TYPE) & temp_mask; > > + unsigned int fua_flag, meta_flag, io_flag; > > + unsigned int op_flags = 0; > > + > > + if (fio->op != REQ_OP_WRITE) > > + return 0; > > + if (fio->type == DATA) > > + io_flag = fio->sbi->data_io_flag; > > + else if (fio->type == NODE) > > + io_flag = fio->sbi->node_io_flag; > > + else > > + return 0; > > + > > + fua_flag = io_flag & temp_mask; > > + meta_flag = (io_flag >> NR_TEMP_TYPE) & temp_mask; > > /* > > * data/node io flag bits per temp: > > @@ -400,9 +412,10 @@ static void __attach_io_flag(struct f2fs_io_info *fio, unsigned int io_flag) > > * Cold | Warm | Hot | Cold | Warm | Hot | > > */ > > if ((1 << fio->temp) & meta_flag) > > - fio->op_flags |= REQ_META; > > + op_flags |= REQ_META; > > if ((1 << fio->temp) & fua_flag) > > - fio->op_flags |= REQ_FUA; > > + op_flags |= REQ_FUA; > > + return op_flags; > > } > > static struct bio *__bio_alloc(struct f2fs_io_info *fio, int npages) > > @@ -412,14 +425,10 @@ static struct bio *__bio_alloc(struct f2fs_io_info *fio, int npages) > > sector_t sector; > > struct bio *bio; > > - if (fio->type == DATA) > > - __attach_io_flag(fio, sbi->data_io_flag); > > - else if (fio->type == NODE) > > - __attach_io_flag(fio, sbi->node_io_flag); > > - > > bdev = f2fs_target_device(sbi, fio->new_blkaddr, §or); > > - bio = bio_alloc_bioset(bdev, npages, fio->op | fio->op_flags, GFP_NOIO, > > - &f2fs_bioset); > > + bio = bio_alloc_bioset(bdev, npages, > > + fio->op | fio->op_flags | f2fs_io_flags(fio), > > + GFP_NOIO, &f2fs_bioset); > > bio->bi_iter.bi_sector = sector; > > if (is_read_io(fio->op)) { > > bio->bi_end_io = f2fs_read_end_io;