From c89849cc0259f3d33624cc3bd127685c3c0fa25d Mon Sep 17 00:00:00 2001 From: Pan Dong Date: Tue, 25 May 2021 15:36:56 +0800 Subject: ext4: fix avefreec in find_group_orlov 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 --- fs/ext4/ialloc.c | 11 +++++------ 1 file changed, 5 insertions(+), 6 deletions(-) diff --git a/fs/ext4/ialloc.c b/fs/ext4/ialloc.c index 9bab7fd4ccd5..e89fc0f770b0 100644 --- a/fs/ext4/ialloc.c +++ b/fs/ext4/ialloc.c @@ -402,7 +402,7 @@ static void get_orlov_stats(struct super_block *sb, ext4_group_t g, * * 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. * @@ -411,7 +411,7 @@ static void get_orlov_stats(struct super_block *sb, ext4_group_t g, * 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 @@ -427,7 +427,7 @@ static int find_group_orlov(struct super_block *sb, struct inode *parent, 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; @@ -446,9 +446,8 @@ static int find_group_orlov(struct super_block *sb, struct inode *parent, 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); -- cgit v1.2.3-59-g8ed1b