Chris Murphy <lists@xxxxxxxxxxxxxxxxx> writes: > On Apr 27, 2012, at 9:53 AM, Jeff Moyer wrote: > >> Chris Murphy <lists@xxxxxxxxxxxxxxxxx> 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. > > This is happening on internal disks, targeted for Fedora > installation. I can hear it once install is complete, still booted > from DVD media. Is this a bug? So long as the file system is mounted and the itable initialization is not complete, I would expect the initialization to continue. Does that answer your question? Cheers, Jeff -- devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxxx https://admin.fedoraproject.org/mailman/listinfo/devel
