google-{asurada,cherry,corsola,gru,kukui,oak,trogdor}: enable depthcharge image compression

Enable compression to reduce the size of vmlinuz.kpart. This fixes the regular initramfs being too big to fit in kukui's small kernel partition size (the bootloader supports larger partitions but changing the size in the device package would break old installs). I enabled this for every supported device to prevent running into more size issues, but some like asurada would most likely never reach the partition size limit (128MB). I am unsure how much this impacts boot times, but google uses this so it shouldn't be too bad.

Tested devices:

• Asurada
• Cherry
• Corsola
• Gru
• Kukui
• Oak
• Trogdor

I'm looking for testers for Cherry, Corsola, Gru, and Oak. The rest I can test myself.

Depends on !5373 (merged)

marked the checklist item Kukui as completed

By WeirdTreeThing on 2024-07-23T21:07:27

requested review from @jenneron

By clayton craft on 2024-07-23T22:36:35

How much does this reduce the size of the boot partition image?

By clayton craft on 2024-07-23T23:18:58

approved this merge request

By clayton craft on 2024-07-23T22:38:33

approved this merge request

By Robert Eckelmann on 2024-07-23T22:47:27

resolved all threads

By clayton craft on 2024-07-23T23:18:58

marked the checklist item Asurada as completed

By WeirdTreeThing on 2024-07-23T23:44:00

marked the checklist item Trogdor as completed

By WeirdTreeThing on 2024-07-23T23:44:01

Tested on a magneton just now (corsola-steelix-sku393221) by generating an image with pmbootstrap, booting it from an SD card, running mrtest 5373 and mrtest 5376, then rebooting.

Shouldn't be a problem with other devices either.

By Alper Nebi Yasak on 2024-07-25T13:10:00

looks good, not testing it though

By jenneron on 2024-07-25T05:26:46

approved this merge request

By jenneron on 2024-07-25T05:26:52

do armv7 devices not support it though? or do they already compress image?

By jenneron on 2024-07-31T21:52:46

marked the checklist item Corsola as completed

By WeirdTreeThing on 2024-07-25T13:10:22

cherry/tomato looking good

By Ingo Reitz on 2024-07-26T18:22:27

marked the checklist item Cherry as completed

By WeirdTreeThing on 2024-07-26T18:22:30

This is awesome! I wonder if we can do the same with device-google-x64-cors, as building new images has been failing on bpo for a while with (e.g. here):

(002338) [18:40:54] (native) % dd if=/mnt/rootfs_google-x64cros/boot/vmlinuz.kpart of=/dev/installp1
dd: error writing '/dev/installp1': No space left on device
32769+0 records in
32768+0 records out
16777216 bytes (16.0MB) copied, 0.239993 seconds, 66.7MB/s

So the limit there seems to be 16 MiB.

By Oliver Smith on 2024-08-06T16:09:29

resolved all threads

By WeirdTreeThing on 2024-08-06T16:09:29

added 167 commits

• f5634266...0cd24d14 - 160 commits from branch postmarketOS:master
• d7e61d86 - google-gru: enable depthcharge image compression
• 230f4aca - google-kukui: enable depthcharge image compression
• 83665644 - google-oak: enable depthcharge image compression
• 5daa1f75 - google-trogdor: enable depthcharge image compression
• 19f000bf - google-asurada: enable depthcharge image compression
• caa99e62 - google-cherry: enable depthcharge image compression
• 9059abf2 - google-corsola: enable depthcharge image compression

Compare with previous version

By WeirdTreeThing on 2024-08-06T16:09:41

mentioned in issue #3095 (closed)

By Oliver Smith on 2024-08-11T12:31:49

@WeirdTreeThing how long do you plan to wait for the open tests (Gru/Oak)?

By Robert Eckelmann on 2024-08-15T08:15:18