[arch-releng] [PATCH 1/1] mkfs: limit size of ext4 block group descriptor table

[Gerardo Exequiel Pozzi]

On 08/22/2014 06:31 PM, Christian Hesse wrote:
> Gerardo Exequiel Pozzi <vmlinuz386 at gmail.com> on Fri, 2014/08/22 14:39:
>> On 08/22/2014 09:59 AM, Christian Hesse wrote:
>>> From: Christian Hesse <mail at eworm.de>
>>>
>>> The ext4 filesystems are create with a fixed size of 32GB. After mkfs
>>> the empty filesystem already has a disk usage of about 4.3MB.
>>> Limiting the size of ext4 block group descriptor table reduces this
>>> to just 312KB.
>>> ---
>>>  archiso/mkarchiso | 2 +-
>>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>>
>>> diff --git a/archiso/mkarchiso b/archiso/mkarchiso
>>> index 2de026e..8c3bfbf 100755
>>> --- a/archiso/mkarchiso
>>> +++ b/archiso/mkarchiso
>>> @@ -205,7 +205,7 @@ _mkairootfs () {
>>>      if [[ ${quiet} == "y" ]]; then
>>>          _qflag="-q"
>>>      fi
>>> -    mkfs.ext4 ${_qflag} -O ^has_journal -E lazy_itable_init=0 -m 0 -F
>>> "${work_dir}/airootfs.img"
>>> +    mkfs.ext4 ${_qflag} -O ^has_journal -E lazy_itable_init=0,resize=33G
>>> -m 0 -F "${work_dir}/airootfs.img" tune2fs -c 0 -i 0
>>> "${work_dir}/airootfs.img" &> /dev/null _msg_info "Done!"
>>>      _mount_airootfs
>>>
>>
>> Nice point. But I guess, should be better to disable it at all using
>> ^resize_inode (304K, haha ;))
> 
> Ah, did not know that. Great! ;)
> 

Yup!

https://projects.archlinux.org/archiso.git/commit/?id=9f889900654e991ec644d4bddab132beb4f2ac67

Thanks.


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