[Bug 14354] Bad corruption with 2.6.32-rc1 and upwards

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http://bugzilla.kernel.org/show_bug.cgi?id=14354





--- Comment #132 from Eric Sandeen <sandeen@redhat.com>  2009-10-27 20:31:28 ---
A few other observations from testing today.

I'm driving a test on a lab box by doing a make modules_install into
/tmp/modules on the victim box, and cycling power at some random point while
that runs.

2.6.32 seems to hit this reliably, with the root fs pretty well munged.  2.6.31
hasn't seen it hit yet in my testing, maybe Linus' ext4_write_inode vs.
writeback theory is correct ...

Perhaps more strange, doing the same test on a non-root fs under 2.6.32 also
doesn't seem to hit it reliably.  Could it be something about the remount,ro
flush of the root fs on the way down?

Suspecting that possibly "mount -o ro; e2fsck -a /dev/root" during bootup was
causing problems by writing to the mounted fs, I short-circuited the boot-time
fsck -a; things were still badly corrupted so that doesn't seem to be it.

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