Re: [PATCH 0/7] Rework irq injection infrastructure

[Avi Kivity <avi-atKUWr5tajBWk0Htik3J/w@public.gmane.org>]

Dong, Eddie wrote:
>> What I mean is we pre-load 2 pages where the stack are in, the 
>> logic may
>> be:
>>
>> If (real mode)
>> 	get 2 pages.
>> enter critical path
>> ....
>> VM Resume.
>> put these 2 pages.
>> handle VM Exit normally.
>>
>>
>>     
> With 2nd thinking, We can cache these 2 pages. Something like:
> if (real mode)
> 	cache_2_pages (ss:esp)
> enter critical path.
>
> In cache_2_pages, old cache can be invalidated (put to user pages), new
> pages are loaded (get user page) to avoid SW irq injection page fault.
> When switch from real mode to protect mode, invalidate the page cache.
>
>   

I prefer the first one.  Indefinitely holding on to pages is not good, 
we may want to remove those pages for swapping or page migration.


-- 
error compiling committee.c: too many arguments to function


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