Bugs item #2487340, was opened at 2009-01-05 21:09
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Category: None
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Jake Muss (jaketmuss)
Assigned to: Nobody/Anonymous (nobody)
Summary: Possible memory corruption when file > RAM

Initial Comment:
Host: Debian Lenny AMD64, Intel Q6600 , kvm-82
Guest, Debian Lenny AMD64

I've been having issues with file corruption and I've simplified the issue down 
to the following:

create a 1G file: dd if=/dev/urandom of=1G bs=1G count=1
md5sum the file twice and the results will be different.

I've tested this on ext2, ext3, backing device lvm,qcow2,raw

If I change the RAM to 2G, I can then correctly md5sum the original file, 
however if I create a new file that's 2G the issue reappears. 

The only time the test has not failed was for the first few tests after the odd 
reboot. 

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