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

[Eric Sandeen]

Gene Czarcinski wrote:

...

> I am not sure if this is related or not ...
> 
> During the F12 development cycle, I have done a number of installs on both 
> bare hardware and qemu-kvm guests.
> 
> 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 do not know if this is because ext4 "formatting" needs to do a lot more work 
> than ext3 or if there is a performance issue.
> 
> Gene
> 

There shouldn't be a big difference, but if you want to do some tests, 
find a difference, and report back with some times, I'd be interested.

-Eric