What's the I/O situation? I did my build from an HDD, WD Blue. Also, kernel config matters a lot - I used yesterday's master branch from Linus, with Alpine Linu

What's the I/O situation? I did my build from an HDD, WD Blue. Also, kernel config matters a lot - I used yesterday's master branch from Linus, with Alpine Linux 3.10's ppc64le config, plus olddefconfig to catch it up.