Default mount options (that suck less).

[Niv Sardi <xaiki@xxxxxxx>]

Hello,

XFS's default mount options are in most cases sub-optimal, we should try
to have more sensible defaults, so far I'm following some quick dave-powered
recomendations:

- version 2 logs
- attr2
- lazy superblock counters
- less allocation groups for single disk configs

- imaxpct default can be reduced

it is currently 25, what would be reasonable ?

- dropping the ability to turn unwritten extents off completely

please submit your pet-idea for better defaults here.

Cheers, 
-- 
Niv