There are definitely still problems with btrfs compression and uboot. If I take this image, update /etc/fstab to add compress=zlib, reboot to remount, and then run "btrfs fi defrag -c -r /" to compress the full filesystem, then it refuses to boot. All I see on the console is "starting the kernel" and then nothing. All the usr lights come on full and it sits there.
I'm still experimenting a bit. I think an attribute can be added to the /boot directory to have it not compress stuff in /boot. I want to see if that helps at all. Dan On Wednesday, January 31, 2018 at 9:21:02 PM UTC-5, RobertCNelson wrote: > > On Wed, Jan 31, 2018 at 8:18 PM, Robert Nelson <robert...@gmail.com > <javascript:>> wrote: > > On Wed, Jan 31, 2018 at 8:09 PM, Stuart Longland > > <stu...@longlandclan.id.au <javascript:>> wrote: > >> On 01/02/18 10:07, Mone wrote: > >>> I tried with a new snapshot and it works very well. Alongside that, I > am > >>> curious and would like to learn about the BBB conversion from ext4 to > >>> flash filesystem. Are there any documentation/manual online that could > >>> explain/hint/guide through the filesystem conversion from ext4 to > flash > >>> filesystem like btrfs? > >> > >> It's worth pointing out that btrfs is not a flash filesystem, it needs > a > >> FTL (Flash Transition Layer) to do wear levelling on a NAND flash the > >> same as EXT4 does. > >> > >> Your biggest hurdle is the fact that U-Boot does not understand btrfs, > >> so you'll need a /boot partition formatted EXT4. Not sure that this is > >> likely to change, as porting btrfs to U-Boot could be a major > >> undertaking as it's much more complex. > > > > Actually U-Boot has btrfs support as of v2018.01 (even ZLIB > > compression! lzo is broken). > > > > We got a patch merged in v2018.03-rc1 that fixes (lzo compression..) > > if you want to give it a go, use this base image: > > > https://rcn-ee.net/rootfs/bb.org/testing/2018-01-28/buster-iot/bone-debian-buster-iot-armhf-2018-01-28-4gb.img.xz > > > it's one partition btrfs. > > Regards, > > -- > Robert Nelson > https://rcn-ee.com/ > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/0e2d1750-05fc-47c0-9e48-7f021c5a5bb2%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
