Chris Murphy <li...@colorremedies.com> writes: > Normally top reports CPU line, sy at 0.4% when idle. If I format an > external Firewire disk as btrfs and mount it, it remains at 0.4%. If I > reformat as XFS and mount it, again top reports sy at 0.4%. However, > if I reformat as ext4 and mount it, sy runs at 3.5%. These two > processes are now at the top of top's results: > > kworker/1:2 > kworker/0:4 > > Each uses on average 1.9% CPU. The light on the external drive flashes > 4x per second. There are no processes using the disk at all while this > is going on. If I umount it, the pulsing stops. If I remount it, the > pulsing resumes as does the slightly higher CPU consumption. > > This doesn't happen with the same hardware mounted XFS or btrfs or > HFS+. > > Odd?
Sounds like lazy itable init. Try mkfs -t ext4 -E lazy_itable_init=0. Cheers, Jeff -- devel mailing list devel@lists.fedoraproject.org https://admin.fedoraproject.org/mailman/listinfo/devel
