Re: [PATCH] ext4 extent support

[Felix Zielcke]

From: "JavierMartín" <address@hidden>
Sent: Saturday, July 05, 2008 3:25 PM
To: "The development of GRUB 2" <address@hidden>
Subject: Re: [PATCH] ext4 extent support

> I think flex_bg support is unimplemented right now (at least I didn't
> see it anywhere), but it "worked" because it's not being used? Just a
> guess

I just checked.
Kernel 2.6.26-rc8 has a bit code with flex_bg
e2fsprogs 1.41WIP from Debian experimantel has a bit more code with flex 
(not much with flex_bg more flexbg or just _flex)
But I don't know much C so I don't understand the code :)
Anyway I think the most important ext4 support are extents, because you can 
enable them by just remounting to ext4 as long as you don't use noextents 
mount option
flex_bg can only be enabled by mkfs.ext4(dev) not afterwards with tune2fs 
but it's default enabled in mke2fs.conf for ext4(dev)
uninit_bg isn't enabled by default and can be enabled afterwards with 
tune2fs but resize2fs isn't currently working with it