Re: [Qemu-devel] [patch v4 13/16] e1000: add busy flag to anti broken device state

[Avi Kivity]

On 10/22/2012 11:23 AM, Liu Ping Fan wrote:
> The broken device state is caused by releasing local lock before acquiring
> big lock. To fix this issue, we have two choice:
>   1.use busy flag to protect the state
>     The drawback is that we will introduce independent busy flag for each
>     independent device's logic unit.
>   2.reload the device's state
>     The drawback is if the call chain is too deep, the action to reload will
>     touch each layer. Also the reloading means to recaculate the intermediate
>     result based on device's regs.
> 
> This patch adopt the solution 1 to fix the issue.

Doesn't the nested mmio patch detect this?


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