ext2/3 issue 2.6 vs 2.4 kernels

ext2/3 issue 2.6 vs 2.4 kernels

[dan carpenter]

I seem to get filesystem corruption whenever I mount a Fedora 
Core 2 (2.6.5 kernel) with a RedHat 9 rescue CD (2.4.20) or my
other 2.4.18 rescue media and try to chroot to the system image.
I've tried on a few systems so it's not a hardware issue.

Here are the messages I get in dmesg.  They seem file system 
related.

EXT3-fs: mounted filesystem with ordered data mode.
attempt to access beyond end of device
08:02: rw=0, want=1219858868, limit=15767797
attempt to access beyond end of device
08:02: rw=0, want=1219858868, limit=15767797

I haven't been able to reliably reproduce the actual file 
system corruption that I've seen.  Sometimes ls doesn't work
in /bin/ or once I lost everything under /usr.

I've googled for this and I found a redhat bug that might be
related.
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=126730

I have tried with both ext2 and ext3 partitions formatted 
under the 2.6 kernel and I get the same results in both cases.

Has something changed in ext2 and ext3 to make them not 
backward compatible to 2.4 kernels?

regards,
dan carpenter

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ext2/3 issue 2.6 vs 2.4 kernels

[Nick Warne]

I do not know if this is related, but input anyway.

I moved from RH 2.4.x kernel -> 2.6.x. kernel on my box.  After a lot of 
upgrades to most system stuff
 
( http://www.hantslug.org.uk/cgi-bin/wiki.pl?LinuxHints/RedHat_2.4_To_2.6_Kernel_Upgrade )

I found FDISK broke and reported wrong disk sectors etc.  A lot of Googling 
revealed it was indeed a bug of sorts (I think), and an upgrade sorted it 
(file-utils)

Now whether FDISK is used in this I do not know.

Nick
-- 
"When you're chewing on life's gristle,
Don't grumble, Give a whistle..."

Re: ext2/3 issue 2.6 vs 2.4 kernels

[dan carpenter]

> 
> Do you use EAs and SELinux security extensions under 2.6?  This can
> make symlinks appear to be "slow" symlinks because of the added EA
> block, and that will cause them to point into nothingness under 2.4.
> 
> Cheers, Andreas

Yes.  You are correct.  That's what's happenning.

https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=137068

John Reiser sent me the bugzilla link in an email.

regards,
dan carpenter


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