Disable ebuild-locks for the emerge command that creates the image.
Ebuild-locks protect unsandboxed ebuild phases from running
concurrently, but also slow things down greatly when a lot of
concurrency would otherwise be possible. The image build phase merges a
big amount of binary packages, and I am not aware of us having any
phases that risk concurrently modifying shared files.
I have been testing this for the last months and have not seen any
failures. The time savings are significant: this cuts image build time
from 20m to 10m for me.
Signed-off-by: Jeremi Piotrowski <jpiotrowski@microsoft.com>
4cdacf5ae4