[Bug 453579] Re: in-place corruption of large files *without fsck or reboot* reported with linux 2.6.31-14.46 on ext4

[Oliver Seemann]

I believe I must withdraw my bug report. I have a test case that
reproduces the problem, but it does not seems to be related to ext4, as
turned out today.

I read about 2.6.31-18 here and updated yesterday. But also with the new
kernel I could reproduce the problem. Wondering about that I created an
XFS partition and repeated the test on it ... also positive. So my
problem is somewhere else.

The test is copying 4 big files totaling 11gb via nfs from an old Dapper
box to a local partition. One of the files always ended up with a
mismatching sha1 sum. The "cmp -l" output is always a single contiguous
128 byte block at some random offset. The values don't seem to be
affected by single bit flips (110010 -> 101010, 11111101 -> 11010101,
10100 -> 101010,  1110 -> 11010111, 11110001 -> 11010010). Memtest86
also ran fine, at least on this box, I did not yet test the Dapper one.

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in-place corruption of large files *without fsck or reboot* reported with linux 2.6.31-14.46 on ext4
https://bugs.launchpad.net/bugs/453579
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