[arch-releng] [PATCH 1/1] double file size with sparse blocks
Christian Hesse
list at eworm.de
Sat Jan 11 06:35:03 EST 2014
Gerardo Exequiel Pozzi <vmlinuz386 at yahoo.com.ar> on Fri, 2014/01/10 23:53:
> 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 :)
Great, thanks!
--
main(a){char*c=/* Schoene Gruesse */"B?IJj;MEH"
"CX:;",b;for(a/* Chris get my mail address: */=0;b=c[a++];)
putchar(b-1/(/* gcc -o sig sig.c && ./sig */b/42*2-3)*42);}
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