@viraniac well, you're absolutely right! Same SD card with a fresh noble install, running on a Pi 4, first stock and second with a downgraded dracut from mantic:
Pi 4B, stock -- 03:05
Pi 4B, downgrade -- 01:10
That is a pretty substantial regression, and diff'ing the initrds once more showed they're basically identical in content (unsurprisingly), so it's not writing any less. I wonder if it's added some sync points or something similar.
@viraniac well, you're absolutely right! Same SD card with a fresh noble install, running on a Pi 4, first stock and second with a downgraded dracut from mantic:
Pi 4B, stock -- 03:05
Pi 4B, downgrade -- 01:10
That is a pretty substantial regression, and diff'ing the initrds once more showed they're basically identical in content (unsurprisingly), so it's not writing any less. I wonder if it's added some sync points or something similar.