Hi
In upstream qemu.git:
commit 0aa217e46124e873f75501f7187657e063f5903b
Author: Kevin Wolf <[email protected]>
Date: Tue Jun 30 13:06:04 2009 +0200
qcow2: Make cache=writethrough default
The performance of qcow2 has improved meanwhile, so we don't need to
special-case it any more. Switch the default to write-through caching
like all other block drivers.
Signed-off-by: Kevin Wolf <[email protected]>
Signed-off-by: Anthony Liguori <[email protected]>
You can pass cache=writeback to get the old behavior, but it's a bit
unsafe: even if the guest believes some I/O have hit the disk, they
might still be in caches on the host.
Bye
--
Loïc Minier
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