Re: [RFC][PATCH] qemu-kvm: Introduce writeback scope for cpu_synchronize_state

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On 11/18/2009 11:50 AM, Jan Kiszka wrote:

INIT, too.
INIT should be handled by queuing up the next mp_state.

And clearing the previous queue; otherwise our queue is unbounded.

BTW, as we do not inject mp_state changes from user space during
runtime, the issue I saw with the current interface is not existing. We
just need to add that queuing feature to asynchronous in-kernel mp_state
changes, and we should be fine.


Let's assume we will have such changes in future kernels: should
qemu-kvm and qemu upstream also bother about older kernels and establish
workarounds? Because then we need to find a cleaner approach than the
current one, and my proposed patch comes into the game again.

If we treat this as a bug, then we fix the older kernels too.

--
Do not meddle in the internals of kernels, for they are subtle and quick to panic.

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