On Sat, 20 Jul 2013 17:15:50 +0200, Jason Russell wrote: > Ive also noted that this excessive hdd chatter does not occur > immediately after a fresh format with arch on btrfs root. > > Ive made some deductions/assumptions: > This only seems to occur with btrfs roots. > This only happens after some number of reboots OR after the partition > fills up a little bit. > Im pretty sure of ruled out everything except for the filesystem.
In my experience (as of 3.8 or so), Btrfs performance degrades on a filled-up filesystem, even a comparatively new one. Various background workers start to eat io according to atop. > I have just done two clean installs to more thoroughly compare ext4 > and btrfs roots. So far no excessive hdd chatter from btrfs. > > I have also seen what I have described on two other computers > (different hardware entirely) where there is lots of hdd chatter from > btrfs root, and nothing from ext4. > > Here are two threads: > https://bbs.archlinux.org/viewtopic.php?pid=1117932 > https://bbs.archlinux.org/viewtopic.php?pid=1301684 -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
