cybernet wrote:
A preliminary development version of ext4 was included in version 2.6.19^[4] <http://en.wikipedia.org/wiki/Ext4#cite_note-3> of the Linux kernel <http://en.wikipedia.org/wiki/Linux_kernel>. On 11 October 2008, the patches that mark ext4 as stable code were merged in the Linux 2.6.28 source code repositories,^[5] <http://en.wikipedia.org/wiki/Ext4#cite_note-4> denoting the end of the development phase and recommending ext4 adoption. Kernel 2.6.28, containing the ext4 filesystem, was finally released on 25 December 2008

http://en.wikipedia.org/wiki/Ext4

CentOS5.5 has the 2.6.18.* kernel so doesn't support ext4
WRONG - please look at the CentOS/Redhat release notes - it was back ported - this is why we use this distro.

*From:* Jason Pyeron <[email protected]>
*To:* 'CentOS mailing list' <[email protected]>
*Cc:*
*Sent:* Thursday, December 9, 2010 9:38:20 AM
*Subject:* [CentOS] 5.5 x86_64 live cd

In the bang head and repeat mode here.

The live usb partition is /dev/sda1

Reboot / power on
It auto mounts the /dev/sda2 as ext4 on /mnt/disc/sda2
$ umount /mnt/disc/sda2
$ mkdir /root/foo
$ mke2fs /dev/sda2
$ mount /dev/sda2 /root/foo
Kernel panic

Snip from the kernel panic:
??????
list_del+0xb/0x71
cache_alloc_refill+0xf1/0x186
ext2_fill_super+0x0/0xa37
....
system_call+0x7e/0x83

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- Jason Pyeron                      PD Inc. http://www.pdinc.us -
- Principal Consultant              10 West 24th Street #100    -
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This message is copyright PD Inc, subject to license 20080407P00.



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