http://bugzilla.suse.com/show_bug.cgi?id=1021307 http://bugzilla.suse.com/show_bug.cgi?id=1021307#c18 Jan Kara <jack@suse.com> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |dsterba@suse.com --- Comment #18 from Jan Kara <jack@suse.com> --- As Mel says gathering 'iostat -x 5' and seeing the numbers around stall time is a good idea. We'll get idea how much the disk is busy around that time. You can check which IO scheduler you are using in /sys/block/<device>/queue/scheduler however on 42.2 for non-rotating disk it should already be set to 'deadline'. But it doesn't hurt to verify it on your machine. Finally, I'm also adding David to CC as a btrfs guy. Maybe he has an idea why fsync(2) can take 5 minutes for the root btrfs filesystem. -- You are receiving this mail because: You are on the CC list for the bug.