[pve-devel] Default cache mode for VM hard drives

[Dietmar Maurer]

> I'm not kernel/IO expert in any way, but I think this test program has a 
> race condition, so it is not helping us diagnose the problem.
> 
> We're writing to buffer x while it is in use by write syscall. This is 
> plainly wrong on userspace.

For this test, we do not care about userspace semantics. The point is
that it results in damaged RAID, which should never! happen.