With btrfs on Asus T100TA I’ve hit very long delay during kernel startup. Like:
jhorak@t100 ~> systemd-analyze
Startup finished in 2.075s (firmware) + 14.669s (loader) + 36.202s (kernel) + 13.748s (userspace) = 66.697s
The kernel is stuck on scanning for btrfs filesystems message.
The issue is best described there: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1460447
The scan is done because the kernel is looking for the hibernation file. In case you don’t want to use hibernation you can append resume= to the kernel parameters in /etc/default/grub to the GRUB_CMDLINE_LINUX_DEFAULT variable and update grub.cfg by:
sudo update-grub2
Then the next boot will be significantly faster:
jhorak@t100 /e/default> systemd-analyze
Startup finished in 2.075s (firmware) + 14.669s (loader) + 6.202s (kernel) + 13.748s (userspace) = 36.697s
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