[arch-releng] [PATCH 1/1] double file size with sparse blocks

[Gerardo Exequiel Pozzi]

On 01/10/2014 11:47 PM, Gerardo Exequiel Pozzi wrote:
> On 01/09/2014 05:49 AM, Christian Hesse wrote:
>> Christian Hesse <list at eworm.de> on Mon, 2013/09/02 10:03:
>>> From: Christian Hesse <mail at eworm.de>
>>>
>>> This allows to grow the filesystem after system boot up. We have no
>>> additional cost as squashfs handles sparse files.
>>> ---
>>>  archiso/mkarchiso | 2 ++
>>>  1 file changed, 2 insertions(+)
>>>
>>> diff --git a/archiso/mkarchiso b/archiso/mkarchiso
>>> index 8f9ed42..563f624 100755
>>> --- a/archiso/mkarchiso
>>> +++ b/archiso/mkarchiso
>>> @@ -364,6 +364,8 @@ _mkfs () {
>>>      cp -aT "${_fs_src}/" "${work_dir}/mnt/${_src}/"
>>>      _msg_info "Done!"
>>>      _umount_fs "${work_dir}/mnt/${_src}"
>>> +    # double size with sparse blocks, will allow to grow the filesystem
>>> +    truncate -s$((_fs_size*2))M "${_fs_img}"
>>>  }
>>>  
>>>  command_checksum () {
>>
>> Currently I am maintaining this in a local package for myself. Any chance to
>> get this merged upstream?
>>
> 
> No. This is a special case. If root-image.fs.sfs is copied to a
> filesystems that does not support sparse files (FAT commonly for
> USB-keys), this is waste of free space.
> 

brb, ignore me!! truncate is on root-image.fs not root-images.fs.sfs :P

Yes, this can be safe by default and can be included for next release :)

-- 
Gerardo Exequiel Pozzi
\cos^2\alpha + \sin^2\alpha = 1

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