RE: [Xen-devel][RFC]degradation on IPF due to hypercall set irq

["Xu, Anthony" <anthony.xu@xxxxxxxxx>]

Keir Fraser write on 2006年11月22日 18:28:
> On 22/11/06 10:23, "Xu, Anthony" <anthony.xu@xxxxxxxxx> wrote:
> 
>> I prefer atomic access, we used it in shared PIC.
>> If each thread flush multicall seperately, There are some extra
>> hypercalls.
> 
> Since the threads run independently there seems little choice but for
> each to be able to flush. If the IDE DMA support had been properly
> integrated into the qemu select() event loop this would not be an
> issue.


Agree, we can use pipe to integrate IDE DMA support into select.
But we still need to use atomic access to shawdow line.

--Anthony
   
> 
>  -- Keir

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