[pve-devel] Default cache mode for VM hard drives
dietmar at proxmox.com
Thu May 28 17:54:46 CEST 2015
> If you provide a buffer to the kernel, that you change while it is
> working with it, I don't know why you expect a reliable/predictable
> result? Specially (but not only) if you tell it not to make a copy!!
> Note that without O_DIRECT you won't get a "correct" result either; disk
> may end not containing the data in the buffer when write was called.
> Softmirror data will be identically uncertain :)
Again, we do not expect a correct, reliable or predicable result. But we
would expect that the RAID device is still in a consistent state. Or
is that too much to expect?
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