linux-ext4 - [Bug 218011] ext4 root filesystem related hangs on 6.5 kernels

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Date:   Sun, 15 Oct 2023 06:20:44 +0000
From:   bugzilla-daemon@...nel.org
To:     linux-ext4@...r.kernel.org
Subject: [Bug 218011] ext4 root filesystem related hangs on 6.5 kernels

https://bugzilla.kernel.org/show_bug.cgi?id=218011

--- Comment #5 from jaak+bugzilla.kernel.org@...tioja.ee ---
The new root filesystem was created with mkfs.ext4 with no special options.
Here is the relevant /etc/mke2fs.conf:

[defaults]
        base_features =
sparse_super,large_file,filetype,resize_inode,dir_index,ext_attr
        default_mntopts = acl,user_xattr,journal_data
        enable_periodic_fsck = 0
        blocksize = 4096
        inode_size = 256
        inode_ratio = 16384

[fs_types]
        ext3 = {
                features = has_journal
        }
        ext4 = {
                features =
has_journal,extent,huge_file,flex_bg,metadata_csum,64bit,dir_nlink,extra_isize
        }
        small = {
                blocksize = 1024
                inode_ratio = 4096
        }
        floppy = {
                blocksize = 1024
                inode_ratio = 8192
        }
        big = {
                inode_ratio = 32768
        }
        huge = {
                inode_ratio = 65536
        }
        news = {
                inode_ratio = 4096
        }
        largefile = {
                inode_ratio = 1048576
                blocksize = -1
        }
        largefile4 = {
                inode_ratio = 4194304
                blocksize = -1
        }
        hurd = {
             blocksize = 4096
             inode_size = 128
             warn_y2038_dates = 0
        }

And the dumpe2fs -h output from the currently failing system:

dumpe2fs 1.47.0 (5-Feb-2023)
Filesystem volume name:   root
Last mounted on:          /
Filesystem UUID:          b7112037-b835-45ac-b3b3-4d9250c53503
Filesystem magic number:  0xEF53
Filesystem revision #:    1 (dynamic)
Filesystem features:      has_journal ext_attr resize_inode dir_index filetype
needs_recovery extent 64bit flex_bg sparse_super large_file huge_file dir_nlink
extra_isize metadata_csum
Filesystem flags:         signed_directory_hash 
Default mount options:    journal_data user_xattr acl
Filesystem state:         clean
Errors behavior:          Continue
Filesystem OS type:       Linux
Inode count:              2621440
Block count:              10485760
Reserved block count:     524288
Overhead clusters:        242376
Free blocks:              6899974
Free inodes:              2208475
First block:              0
Block size:               4096
Fragment size:            4096
Group descriptor size:    64
Reserved GDT blocks:      1024
Blocks per group:         32768
Fragments per group:      32768
Inodes per group:         8192
Inode blocks per group:   512
Flex block group size:    16
Filesystem created:       Sat Oct 14 18:03:49 2023
Last mount time:          Sat Oct 14 18:16:50 2023
Last write time:          Sat Oct 14 18:16:48 2023
Mount count:              2
Maximum mount count:      -1
Last checked:             Sat Oct 14 18:03:49 2023
Check interval:           0 (<none>)
Lifetime writes:          26 GB
Reserved blocks uid:      0 (user root)
Reserved blocks gid:      0 (group root)
First inode:              11
Inode size:               256
Required extra isize:     32
Desired extra isize:      32
Journal inode:            8
Default directory hash:   half_md4
Directory Hash Seed:      bf662df3-a40b-4276-905e-70bb51bfd867
Journal backup:           inode blocks
Checksum type:            crc32c
Checksum:                 0xdf22e900
Journal features:         journal_64bit journal_checksum_v3
Total journal size:       256M
Total journal blocks:     65536
Max transaction length:   65536
Fast commit length:       0
Journal sequence:         0x00001f33
Journal start:            18150
Journal checksum type:    crc32c
Journal checksum:         0x70a695b1

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