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 X-Spam-Level: X-Spam-Status: No, score=-20.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2A1D1C64E69 for ; Mon, 19 Jul 2021 15:31:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0F3F561003 for ; Mon, 19 Jul 2021 15:31:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238815AbhGSOuG (ORCPT ); Mon, 19 Jul 2021 10:50:06 -0400 Received: from mail.kernel.org ([198.145.29.99]:41942 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1344380AbhGSOsr (ORCPT ); Mon, 19 Jul 2021 10:48:47 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 7D8096141C; Mon, 19 Jul 2021 15:28:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1626708520; bh=NpbK2gd7O74c8e51R28pZrumdvAjjr2RCxASaj3J8QM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=VqZMoN7+T1R7fq1Rvp3myEbfAINlgqcBbfHL+e+sdQl4408K73kcpZ0UYCY8hKkMd i9S0iZ3v4ckhV519j15LTDCavzlotDbWCF7iomoT+x+PX+OjN3TN1RHEJsXxmW+v1l fs0WN9tLMP7kJ2klcBW9WM0rXugHy0Mss9dKL4Cc= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, stable@kernel.org, Pan Dong , Theodore Tso Subject: [PATCH 4.19 024/421] ext4: fix avefreec in find_group_orlov Date: Mon, 19 Jul 2021 16:47:15 +0200 Message-Id: <20210719144947.098226478@linuxfoundation.org> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210719144946.310399455@linuxfoundation.org> References: <20210719144946.310399455@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: Pan Dong commit c89849cc0259f3d33624cc3bd127685c3c0fa25d upstream. The avefreec should be average free clusters instead of average free blocks, otherwize Orlov's allocator will not work properly when bigalloc enabled. Cc: stable@kernel.org Signed-off-by: Pan Dong Link: https://lore.kernel.org/r/20210525073656.31594-1-pandong.peter@bytedance.com Signed-off-by: Theodore Ts'o Signed-off-by: Greg Kroah-Hartman --- fs/ext4/ialloc.c | 11 +++++------ 1 file changed, 5 insertions(+), 6 deletions(-) --- a/fs/ext4/ialloc.c +++ b/fs/ext4/ialloc.c @@ -399,7 +399,7 @@ static void get_orlov_stats(struct super * * We always try to spread first-level directories. * - * If there are blockgroups with both free inodes and free blocks counts + * If there are blockgroups with both free inodes and free clusters counts * not worse than average we return one with smallest directory count. * Otherwise we simply return a random group. * @@ -408,7 +408,7 @@ static void get_orlov_stats(struct super * It's OK to put directory into a group unless * it has too many directories already (max_dirs) or * it has too few free inodes left (min_inodes) or - * it has too few free blocks left (min_blocks) or + * it has too few free clusters left (min_clusters) or * Parent's group is preferred, if it doesn't satisfy these * conditions we search cyclically through the rest. If none * of the groups look good we just look for a group with more @@ -424,7 +424,7 @@ static int find_group_orlov(struct super ext4_group_t real_ngroups = ext4_get_groups_count(sb); int inodes_per_group = EXT4_INODES_PER_GROUP(sb); unsigned int freei, avefreei, grp_free; - ext4_fsblk_t freeb, avefreec; + ext4_fsblk_t freec, avefreec; unsigned int ndirs; int max_dirs, min_inodes; ext4_grpblk_t min_clusters; @@ -443,9 +443,8 @@ static int find_group_orlov(struct super freei = percpu_counter_read_positive(&sbi->s_freeinodes_counter); avefreei = freei / ngroups; - freeb = EXT4_C2B(sbi, - percpu_counter_read_positive(&sbi->s_freeclusters_counter)); - avefreec = freeb; + freec = percpu_counter_read_positive(&sbi->s_freeclusters_counter); + avefreec = freec; do_div(avefreec, ngroups); ndirs = percpu_counter_read_positive(&sbi->s_dirs_counter);