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Re: [Qemu-devel] [RFC] Disk integrity in QEMU

From: nuitari-qemu
Subject: Re: [Qemu-devel] [RFC] Disk integrity in QEMU
Date: Sun, 12 Oct 2008 14:14:18 -0400 (EDT)

 I do not believe that this means that the data is still sitting in the
 host cache.  I realize it may not yet be on a disk, but, at a minimum,
 I would expect that is has been sent to the storage controller.  Do you
 consider the hosts cache to be part of the storage subsystem ?

The fact that the virtualization layer has a cache is really not that unusual.

Wouldn't it be better to have cache=on/off control wether or not qemu/kvm does any caching on their own and have a different configuration option for O_DIRECT / O_DSYNC on the diskfiles?

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