Since systemd updated to 211 from 210 in Arch Linux (i686) on a machine with 1GB of RAM (no swap) and BIOS / MBR.I have no issues on another machine running on x86_64 with BIOS / GPT.
Mar 12 04:15:50 archlinux systemd: /usr/lib/systemd/system-generators/systemd-gpt-auto-generator failed with error code 1.
Mar 12 04:15:50 archlinux systemd-gpt-auto-generator: Out of memory.
I also have this issue, but I'm actually running on a machine with GPT and an encrypted root device. I only have two partitions:
1. EFI system partition (FAT32)
2. LUKS root (btrfs)
I'm booting with gummiboot and running Arch Linux x64.
Fixed by commit 9c4495ca