Raspberry pi 3: btrfs as root fs and uboot (or grub?)

[Tomasz Kłoczko]

Hi,

Current rawhide fedora image is using xfs has a bit higher memory
requirements than btrfs so I've started thinking about migration of my
current image to new root fs on new card.

Looking on partition table on rawhide image served by fedora I see:

Device         Boot   Start      End  Sectors  Size Id Type
/dev/mmcblk0p1         2048    61439    59392   29M  c W95 FAT32 (LBA)
/dev/mmcblk0p2 *      61440  1060863   999424  488M 83 Linux
/dev/mmcblk0p3      1060864  2060287   999424  488M 82 Linux swap / Solaris
/dev/mmcblk0p4      2060288 15126527 13066240  6.2G 82 Linux swap / Solaris

Q1: for what is this fat32 first partition?
Q2: is it possible to install uboot files from /boot on btrfs? (on x86 and
grub it is no problem with this)
Q3: seems someone done porting of the grub to arm so why there is n grub2
package in fedora?

kloczek

[Tom Callaway]

The pi firmware needs to be read off a fat partition:

https://www.raspberrypi.org/documentation/installation/sdxc_formatting.md

On Dec 13, 2016 7:55 AM, "Tomasz Kłoczko"  wrote:
> Hi,
>
> Current rawhide fedora image is using xfs has a bit higher memory
> requirements than btrfs so I've started thinking about migration of my
> current image to new root fs on new card.
>
> Looking on partition table on rawhide image served by fedora I see:
>
> Device         Boot   Start      End  Sectors  Size Id Type
> /dev/mmcblk0p1         2048    61439    59392   29M  c W95 FAT32 (LBA)
> /dev/mmcblk0p2 *      61440  1060863   999424  488M 83 Linux
> /dev/mmcblk0p3      1060864  2060287   999424  488M 82 Linux swap / Solaris
> /dev/mmcblk0p4      2060288 15126527 13066240  6.2G 82 Linux swap / Solaris
>
> Q1: for what is this fat32 first partition?
> Q2: is it possible to install uboot files from /boot on btrfs? (on x86 and
> grub it is no problem with this)
> Q3: seems someone done porting of the grub to arm so why there is n grub2
> package in fedora?
> kloczek
>
> Tomasz Kłoczko | LinkedIn: *http://lnkd.in/FXPWxH http://lnkd.in/FXPWxH*
>
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> To unsubscribe send an email to [e-mail]

[Peter Robinson]

On Tue, Dec 13, 2016 at 12:55 PM, Tomasz Kłoczko
 wrote:
> Hi,
>
> Current rawhide fedora image is using xfs has a bit higher memory
> requirements than btrfs so I've started thinking about migration of my
> current image to new root fs on new card.
>
> Looking on partition table on rawhide image served by fedora I see:
>
> Device         Boot   Start      End  Sectors  Size Id Type
> /dev/mmcblk0p1         2048    61439    59392   29M  c W95 FAT32 (LBA)
> /dev/mmcblk0p2 *      61440  1060863   999424  488M 83 Linux
> /dev/mmcblk0p3      1060864  2060287   999424  488M 82 Linux swap / Solaris
> /dev/mmcblk0p4      2060288 15126527 13066240  6.2G 82 Linux swap / Solaris
>
> Q1: for what is this fat32 first partition?

The raspberry pi firmware
> Q2: is it possible to install uboot files from /boot on btrfs? (on x86 and

No. But there's no u-boot files in boot, they're on the VFAT
partition. I don't believe u-boot supports loading kernel/initrd from
btrfs though.
> grub it is no problem with this)
> Q3: seems someone done porting of the grub to arm so why there is n grub2
> package in fedora?

Because there's a lot of usecases that doesn't work with it. Some of
it histotical, but basically it comes down to someone to spend the
time to do all the work and QA to move over to it. Basically if i'ts
not broken why fix it...

[Dennis Gilmore]

On martes, 10 de enero de 2017 3:48:21 AM CST Peter Robinson wrote:
> On Tue, Dec 13, 2016 at 12:55 PM, Tomasz Kłoczko
>
>  wrote:
> > Hi,
> >
> > Current rawhide fedora image is using xfs has a bit higher memory
> > requirements than btrfs so I've started thinking about migration of my
> > current image to new root fs on new card.

Only the server image uses xfs, the minimal and all other images use ext4 for 
/. the server Working Group decided to use xfs everywhere possible boot is 
ext4 as u-boot only supports it from the filesystems we would want to support 
for booting from.

Dennis