Fwd: Far too long mount time

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Hi,

I'm in the process of setting up a new software raid with four 3TB disks.
So far I'm doing the tests using also bcache on a 60GB partition on a 120GB
SSD. Everything is protected by a UPS.

On the software side: self compiled kernel 3.5.1 and util-linux 2.20.1

Thus far, ext4 is doing really really well but for one thing, the mount
time. At the
moment I'm testing a RAID5 which makes the partition 8.2TB.

ext4 takes:
$ time mount /mnt/raid
0.00s user 79.49s system 92% cpu 1:26.25 total

xfs, OTOH, is way faster:
time mount /mnt/raid
0.00s user 0.01s system 0% cpu 1.869 total

I'v tried everything I could think of but the mount time remains constant.
Is
there anything I can do to speed up the mount time?


--
Javier Marcet <jmarcet@xxxxxxxxx>
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