Support for Large Single Files in Linux 3.0?

[kdvgent]

Tried today to install gentoo on my computer (done this already various times on this and other computers).

Worked with gentoo-sources-3.0.1 and the root partition has an ext4 filesystem. After configuring the kernel (based on Pappy's seed - of course with support for the ext4 filesystem), I rebooted and got a kernel panic with the message that the root partition could not be accessed because of unsupported optional features.

Searching the Internet, I learned that this error comes from the fact that I had not set CONFIG_LSF to yes in the kernel. Made that error already in the past, hence I thought that is easy - follow the ext4 article in the Gentoo wiki.

But if was unable to find under "Enable the block layer" (menuconfig) the option "Support for Large single files". It does not seem to be there any more. And no "CONFIG_LSF is not set" in my .config file neither.

Again searching the Internet, I found (http://cateee.net/lkddb/web-lkddb/LSF.html) that CONFIG_LSF existed in the linux versions 2.6.17 to 2.6.28. linux version 3.0 is not mentioned (although the website seems to be up to date as other parameters mention version 3.0.

My question: is this support for large single files now standard (then I do not see why I get the kernel panic), or can I find it somewhere else when using "make menuconfig". Or should I play save and start again, using ext3 for my root partition (I will never in the near or mid-term future have files bigger than 2 TB)?

At present, I have no access to the computer (hardware problem) and hence cannot provide additional information but I would love to have some hints for when my hardware problems are solved.

Many thanks in advance.

[rndusr]

Are you sure that it tries to mount the partition as ext4? If you have CONFIG_EXT4_USE_FOR_EXT23=y, try disabling that.
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[Jaglover]

[Hypnos]

Did you build ext4 into the kernel? This is necessary in order to mount an ext4 root filesystem, unless you are using an initrd which can load the ext4 module.

An excerpt of my dmesg output:

[kdvgent]

Thanks for all the suggestions until now.

As I said in my original message, I have not access to the computer at present, hence I cannot give additional information.

Hypnos, I obviously have build ext4 support in the kernel

Jaglover, I was working from memory but the exact error message was the one mentioned by Hypnos for EXT3-fs and EXT2-fs but then for EXT4-fs (where Hypnos has another, much nicer message.

Is one of you running kernel version 3.0 or 3.0.1?

Regards,

[Hypnos]

Try the CONFIG_LBDAF key.
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[kdvgent]

Thanks - I'll try as soon as my hardware is functioning again.