linux-ext4 - ext4 errors with full filesystem

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Date:	Thu, 13 Aug 2015 10:23:07 +0200
From:	Olaf Hering <olaf@...fle.de>
To:	linux-ext4@...r.kernel.org
Subject: ext4 errors with full filesystem

I just got the output below in syslog with a full filesystem.
Should I be worried about inconsistent filesystem now, or is that just an
overly verbose message about ENOSPC?  This is a 4.1.5 kernel.

Olaf

root@...book:/dist/iso/sles11 # wget -m -np 'http://cdn.novell.com/prot/La2AdJJ4-Ok~/SLED-11-SP4-DVD-i586-GM-DVD1.iso'
...
Cannot write to ‘cdn.novell.com/prot/La2AdJJ4-Ok~/SLED-11-SP4-DVD-i586-GM-DVD1.iso’ (No space left on device).
root@...book:/dist/iso/sles11 # Aug 13 10:13:35 probook.fritz.box kernel: EXT4-fs (sda5): Delayed block allocation failed for inode 15695873 at logical offset 1942120 with max blocks 221 with error 28
Aug 13 10:13:49 probook.fritz.box kernel: EXT4-fs (sda5): This should not happen!! Data will be lost
Aug 13 10:14:06 probook.fritz.box kernel: EXT4-fs (sda5): Total free blocks count 0
Aug 13 10:14:06 probook.fritz.box kernel: EXT4-fs (sda5): Free/Dirty block details
Aug 13 10:14:07 probook.fritz.box kernel: EXT4-fs (sda5): free_blocks=0
Aug 13 10:14:07 probook.fritz.box kernel: EXT4-fs (sda5): dirty_blocks=221
Aug 13 10:14:07 probook.fritz.box kernel: EXT4-fs (sda5): Block reservation details
Aug 13 10:14:08 probook.fritz.box kernel: EXT4-fs (sda5): i_reserved_data_blocks=221

Filesystem volume name:   DBG1S82E_dist
Last mounted on:          /dist
Filesystem UUID:          62c145ba-e2ba-4592-b355-7bba833fc396
Filesystem magic number:  0xEF53
Filesystem revision #:    1 (dynamic)
Filesystem features:      has_journal ext_attr resize_inode dir_index filetype needs_recovery sparse_super large_file
Filesystem flags:         signed_directory_hash 
Default mount options:    user_xattr acl
Filesystem state:         clean
Errors behavior:          Continue
Filesystem OS type:       Linux
Inode count:              33554432
Block count:              268433408
Reserved block count:     26843
Free blocks:              2038421
Free inodes:              32683679
First block:              0
Block size:               2048
Fragment size:            2048
Reserved GDT blocks:      512
Blocks per group:         16384
Fragments per group:      16384
Inodes per group:         2048
Inode blocks per group:   256
Filesystem created:       Sun Nov 10 14:01:47 2013
Last mount time:          Wed Aug 12 08:49:02 2015
Last write time:          Wed Aug 12 08:49:02 2015
Mount count:              285
Maximum mount count:      -1
Last checked:             Tue Apr 22 09:12:00 2014
Check interval:           0 (<none>)
Lifetime writes:          4960 MB
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:      19e1770c-aa3c-4aba-8108-e9a5c8792e09
Journal backup:           inode blocks
Journal features:         journal_incompat_revoke
Journal size:             64M
Journal length:           32768
Journal sequence:         0x0006a56b
Journal start:            10216

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