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 5F358CCA491 for ; Tue, 7 Jun 2022 18:58:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1352392AbiFGS6D (ORCPT ); Tue, 7 Jun 2022 14:58:03 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48282 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1353368AbiFGSx7 (ORCPT ); Tue, 7 Jun 2022 14:53:59 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4C01CAEE04; Tue, 7 Jun 2022 11:03:48 -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 ams.source.kernel.org (Postfix) with ESMTPS id 61277B82366; Tue, 7 Jun 2022 18:03:46 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id C7FDFC34115; Tue, 7 Jun 2022 18:03:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1654625025; bh=qptCCNF7tECs6dLig/pALoDlTt1Z13L70qEupi7cTaU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Fg8aEktVu4KmA1fita4o/3GP873DcXdNTiWI79K2A+giBIU6vo1n2vtS8FJxc7mgT bsOOgnow1leKkzitEMzgryVx4TliXzmDFZBi1dsZ+B9qwO4hpfKdCYjYXI8IRPhT7e sxfaJpAFghYE10wOOVI23JlCZaRYr+IADJXf1WcU= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Dmitry Monakhov , Theodore Tso , stable@kernel.org Subject: [PATCH 5.15 540/667] ext4: mark group as trimmed only if it was fully scanned Date: Tue, 7 Jun 2022 19:03:25 +0200 Message-Id: <20220607164950.895132448@linuxfoundation.org> X-Mailer: git-send-email 2.36.1 In-Reply-To: <20220607164934.766888869@linuxfoundation.org> References: <20220607164934.766888869@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Dmitry Monakhov commit d63c00ea435a5352f486c259665a4ced60399421 upstream. Otherwise nonaligned fstrim calls will works inconveniently for iterative scanners, for example: // trim [0,16MB] for group-1, but mark full group as trimmed fstrim -o $((1024*1024*128)) -l $((1024*1024*16)) ./m // handle [16MB,16MB] for group-1, do nothing because group already has the flag. fstrim -o $((1024*1024*144)) -l $((1024*1024*16)) ./m [ Update function documentation for ext4_trim_all_free -- TYT ] Signed-off-by: Dmitry Monakhov Link: https://lore.kernel.org/r/1650214995-860245-1-git-send-email-dmtrmonakhov@yandex-team.ru Signed-off-by: Theodore Ts'o Cc: stable@kernel.org Signed-off-by: Greg Kroah-Hartman --- fs/ext4/mballoc.c | 18 ++++++++++++------ 1 file changed, 12 insertions(+), 6 deletions(-) --- a/fs/ext4/mballoc.c +++ b/fs/ext4/mballoc.c @@ -6378,6 +6378,7 @@ __releases(ext4_group_lock_ptr(sb, e4b-> * @start: first group block to examine * @max: last group block to examine * @minblocks: minimum extent block count + * @set_trimmed: set the trimmed flag if at least one block is trimmed * * ext4_trim_all_free walks through group's block bitmap searching for free * extents. When the free extent is found, mark it as used in group buddy @@ -6387,7 +6388,7 @@ __releases(ext4_group_lock_ptr(sb, e4b-> static ext4_grpblk_t ext4_trim_all_free(struct super_block *sb, ext4_group_t group, ext4_grpblk_t start, ext4_grpblk_t max, - ext4_grpblk_t minblocks) + ext4_grpblk_t minblocks, bool set_trimmed) { struct ext4_buddy e4b; int ret; @@ -6406,7 +6407,7 @@ ext4_trim_all_free(struct super_block *s if (!EXT4_MB_GRP_WAS_TRIMMED(e4b.bd_info) || minblocks < atomic_read(&EXT4_SB(sb)->s_last_trim_minblks)) { ret = ext4_try_to_trim_range(sb, &e4b, start, max, minblocks); - if (ret >= 0) + if (ret >= 0 && set_trimmed) EXT4_MB_GRP_SET_TRIMMED(e4b.bd_info); } else { ret = 0; @@ -6443,6 +6444,7 @@ int ext4_trim_fs(struct super_block *sb, ext4_fsblk_t first_data_blk = le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block); ext4_fsblk_t max_blks = ext4_blocks_count(EXT4_SB(sb)->s_es); + bool whole_group, eof = false; int ret = 0; start = range->start >> sb->s_blocksize_bits; @@ -6461,8 +6463,10 @@ int ext4_trim_fs(struct super_block *sb, if (minlen > EXT4_CLUSTERS_PER_GROUP(sb)) goto out; } - if (end >= max_blks) + if (end >= max_blks - 1) { end = max_blks - 1; + eof = true; + } if (end <= first_data_blk) goto out; if (start < first_data_blk) @@ -6476,6 +6480,7 @@ int ext4_trim_fs(struct super_block *sb, /* end now represents the last cluster to discard in this group */ end = EXT4_CLUSTERS_PER_GROUP(sb) - 1; + whole_group = true; for (group = first_group; group <= last_group; group++) { grp = ext4_get_group_info(sb, group); @@ -6492,12 +6497,13 @@ int ext4_trim_fs(struct super_block *sb, * change it for the last group, note that last_cluster is * already computed earlier by ext4_get_group_no_and_offset() */ - if (group == last_group) + if (group == last_group) { end = last_cluster; - + whole_group = eof ? true : end == EXT4_CLUSTERS_PER_GROUP(sb) - 1; + } if (grp->bb_free >= minlen) { cnt = ext4_trim_all_free(sb, group, first_cluster, - end, minlen); + end, minlen, whole_group); if (cnt < 0) { ret = cnt; break;