Re: [Ext2-devel] [RFC 0/13] extents and 48bit ext3

Jeff Garzik
2006-06-10T15:03:25Z

Ingo Molnar wrote:
> the ext3 -> ext4 patches add +2115 lines of code (which 2115 lines solve
> the biggest performance and scaling problem ext3 currently has), which
> is 1.9% of the linecount of XFS.

Indeed!

> ext3 does quite a few things to stay compatible with ext2 - and frankly,
> i very much expected it to do that when i migrated my ext2 data to ext3.
> The days of "change the world in an incompatible way and dont look back"
> are gone.

I agree with your point in the thread -- most users and distros don't
change their main fs on a whim. But I also point out that these
extent+48bit changes _do_ change the format in an incompatible way...

Jeff