From: Liu Bo <obuil.liubo@xxxxxxxxx> > I wonder if this ext4 enabled bigalloc (can be checked by dumpe2fs -h $disk). > So bigalloc is known to cause leak space, and it's been just fixed recently. Doesn't look that way: $ uname -a Linux <hostname> 4.14.67-ts1 #1 SMP Wed Aug 29 13:28:25 UTC 2018 x86_64 GNU/Linux $ sudo du -hxs / 20G / $ df -h / Filesystem Size Used Avail Use% Mounted on /dev/disk/by-uuid/<some-uuid> 50G 46G 1.1G 98% / $ sudo dumpe2fs -h /dev/disk/by-uuid/<some-uuid> dumpe2fs 1.42.5 (29-Jul-2012) Filesystem volume name: ROOT Last mounted on: / Filesystem UUID: <some-uuid> Filesystem magic number: 0xEF53 Filesystem revision #: 1 (dynamic) Filesystem features: has_journal ext_attr resize_inode dir_index filetype needs_recovery extent flex_bg sparse_super large_file huge_file uninit_bg dir_nlink extra_isize Filesystem flags: signed_directory_hash Default mount options: user_xattr acl Filesystem state: clean Errors behavior: Continue Filesystem OS type: Linux Inode count: 3276800 Block count: 13107200 Reserved block count: 655360 Free blocks: 9260751 Free inodes: 3078348 First block: 0 Block size: 4096 Fragment size: 4096 Reserved GDT blocks: 1020 Blocks per group: 32768 Fragments per group: 32768 Inodes per group: 8192 Inode blocks per group: 512 Flex block group size: 16 Filesystem created: Tue Jan 16 18:48:13 2018 Last mount time: Mon Oct 1 20:43:59 2018 Last write time: Mon Oct 1 20:43:58 2018 Mount count: 7 Maximum mount count: -1 Last checked: Tue Jan 16 18:48:13 2018 Check interval: 0 (<none>) Lifetime writes: 7159 GB Reserved blocks uid: 0 (user root) Reserved blocks gid: 0 (group root) First inode: 11 Inode size: 256 Required extra isize: 28 Desired extra isize: 28 Journal inode: 8 First orphan inode: 2231477 Default directory hash: half_md4 Directory Hash Seed: 8a6f6d03-37e7-409c-b8c9-d738e0b0a94a Journal backup: inode blocks Journal features: journal_incompat_revoke Journal size: 128M Journal length: 32768 Journal sequence: 0x02a09116 Journal start: 24688 -- Elana Hashman ehashman@xxxxxxxxxxxx
