On 03/05/2019 22.21, Eric Blake wrote:
> On 5/2/19 11:37 PM, Thomas Huth wrote:
>> On 02/05/2019 23.56, Eric Blake wrote:
>>> On 4/28/19 10:18 AM, Thomas Huth wrote:
>>>> QEMU iotest 175 is failing for me when I run it with -raw:
>>>>
>>>>  == creating image with default preallocation ==
>>>>  Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1048576
>>>> -size=1048576, blocks=0
>>>> +size=1048576, blocks=2
>>>
>>> What filesystem?
>>
>> ext4
> 
> Hmm, it's passing for me on ext4, but that probably means we have
> different configuration parameters. I'm not sure how to easily show what
> parameters a particular ext4 partition uses to compare the differences
> between your setup and mine (mine is tuned to whatever defaults Fedora's
> installer chose on my behalf), so maybe someone else can chime in.

$ sudo tune2fs -l /dev/mapper/Home
tune2fs 1.42.9 (28-Dec-2013)
Filesystem volume name:   <none>
Last mounted on:          /home
Filesystem magic number:  0xEF53
Filesystem revision #:    1 (dynamic)
Filesystem features:      has_journal ext_attr dir_index filetype
needs_recovery meta_bg extent 64bit 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:              36700160
Block count:              146800640
Reserved block count:     5873663
Free blocks:              56266267
Free inodes:              35403275
First block:              1
Block size:               1024
Fragment size:            1024
Group descriptor size:    64
Blocks per group:         8192
Fragments per group:      8192
Inodes per group:         2048
Inode blocks per group:   256
First meta block group:   258
Flex block group size:    16
Filesystem created:       Thu Apr 19 18:34:33 2018
Last mount time:          Sat May  4 08:20:36 2019
Last write time:          Sat May  4 08:20:36 2019
Mount count:              224
Maximum mount count:      -1
Last checked:             Thu Apr 19 18:34:33 2018
Check interval:           0 (<none>)
Lifetime writes:          1826 GB
Reserved blocks uid:      0 (user root)
Reserved blocks gid:      0 (group root)
First inode:              11
Inode size:	          128
Journal inode:            8
First orphan inode:       11076944
Default directory hash:   half_md4
Directory Hash Seed:      08e1be04-c3a3-4c37-a059-cf54af5c4bc0
Journal backup:           inode blocks

IIRC I talked to stefanha on IRC about this some weeks ago already, and
he was able to reproduce the problem when using a certain parameter to
create the file system. However, I fail to remember which parameter it
was. Maybe Stefan still remembers...

 Thomas