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    SubjectRE: [PATCH 00/25] Staging: hv: Cleanup vmbus driver code

    > -----Original Message-----
    > From: Christoph Hellwig []
    > Sent: Sunday, May 01, 2011 12:07 PM
    > To: KY Srinivasan
    > Cc: Christoph Hellwig; Greg KH;;;
    > Subject: Re: [PATCH 00/25] Staging: hv: Cleanup vmbus driver code
    > On Sun, May 01, 2011 at 03:46:23PM +0000, KY Srinivasan wrote:
    > > What is the issue here? This is no different than what is done in other
    > > Virtualization platforms. For instance, the Xen blkfront driver is no
    > > different - if you specify the block device to be presented to the guest
    > > as an ide device, it will register for the appropriate ide major number.
    > No, it won't - at least not in mainline just because it's so buggy.
    > If distros keep that crap around I can only recommed you to not use
    > them.


    Could you elaborate on the problems/issues when the block driver registers for the
    IDE majors. On the Qemu side, we have a mechanism to disable the emulation when
    PV drivers load. I don't think there is an equivalent mechanism on the Windows side.
    So, as far as I know, registering for the IDE majors is the only way to also prevent native
    drivers in Linux from taking control of the emulated device.


    K. Y

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