cpio to ext4 seems much slower than to ext2, ext3 or xfs

[Eric Sandeen]

Frank Ch. Eigler wrote:
> Gene Czarcinski <gene at czarc.net> writes:
> 
>> [...]  In all cases, I have formatted the root ("/") partition as
>> ext4.  I have noticed that formatting the partition for ext4 seems
>> to take considerably more wall-clock time for ext4 partitions than
>> my previous experience with ext3 partitions. [...]
> 
> I have seen the same thing; this sort of thing appeared to help:
> 
>   mkfs.ext4 -O uninit_bg -E lazy_itable_init=1
> 
> - FChE
> 

lazy_itable_init isn't yet safe, unfortunately, we still need a kernel 
background zeroing to make it so ...

Anybody got actual numbers?  I don't disagree that mkfs.ext4 is slow in 
the default config, but I don't think it should be slower than mkfs.ext3 
for the same sized disks.

You sure your disks didn't just get bigger since the F9 days? :)

-Eric