resize2fs segfaults on Slackware 64 14.2

haary · 07-28-2016, 02:13 PM

I am trying to shrink a 200GB ext4 partition by a few GB:

Code:

resize2fs -p /dev/sda5 200864640K
resize2fs 1.43.1 (08-Jun-2016)
Resizing the filesystem on /dev/sda5 to 50216160 (4k) blocks.
Begin pass 3 (max = 1545)
Scanning inode table          XXXXXXXXSegmentation fault--------------

The file system was created under another linux distro (I think it was Debian or one of the Ubuntu family). Below is the output of tune2fs -l.

Finally I could shrink the partition under a Debian live system without problems. But under Slackware64 the problem persists.

The system under which the fs was created was 32bit, as was the Debian live system.

Code:

tune2fs 1.43.1 (08-Jun-2016)
Filesystem volume name:   <none>
Last mounted on:          /home
Filesystem UUID:          253d7f76-1b5f-4c5b-a370-dd323a2487f5
Filesystem magic number:  0xEF53
Filesystem revision #:    1 (dynamic)
Filesystem features:      has_journal ext_attr resize_inode dir_index filetype 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:              12656640
Block count:              50603776
Reserved block count:     2530188
Free blocks:              40981291
Free inodes:              12572737
First block:              0
Block size:               4096
Fragment size:            4096
Reserved GDT blocks:      1011
Blocks per group:         32768
Fragments per group:      32768
Inodes per group:         8192
Inode blocks per group:   512
RAID stride:              32743
Flex block group size:    16
Filesystem created:       Wed Oct  7 14:17:00 2015
Last mount time:          Thu Jul 28 20:57:49 2016
Last write time:          Thu Jul 28 20:59:38 2016
Mount count:              0
Maximum mount count:      -1
Last checked:             Thu Jul 28 20:59:38 2016
Check interval:           0 (<none>)
Lifetime writes:          68 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
Default directory hash:   half_md4
Directory Hash Seed:      fd582c08-0085-442b-827e-2534d8c88527
Journal backup:           inode blocks

malekmustaq · 07-28-2016, 08:26 PM

Quote:

I am trying to shrink a 200GB ext4 partition by a few GB
Finally I could shrink the partition under a Debian live system without problems. But under Slackware64 the problem persists.

resize2fs may be used to expand or shrink an UNMOUNTED partition.
But it can only enlarge or expand (with available space) while MOUNTED, beginning kernel 2.6 it supports on-line expanding.

Working with LiveCD assumes that the target volume was not mounted so resize2fs can work with anything.

Hope that helps.

m.m.

haary · 07-29-2016, 12:55 AM

Quote:

Originally Posted by malekmustaq

resize2fs may be used to expand or shrink an UNMOUNTED partition.
But it can only enlarge or expand (with available space) while MOUNTED, beginning kernel 2.6 it supports on-line expanding.

Working with LiveCD assumes that the target volume was not mounted so resize2fs can work with anything.

Hope that helps.

m.m.

Of course it was also unmounted under Slackware64. Otherwise resize2fs complains and terminates. The segfault has nothing to do with it.