Re: [Xen-devel] Wait queue support for 4.3

[Andres Lagar-Cavilla <andreslc@xxxxxxxxxxxxxx>]

On Oct 15, 2012, at 9:47 AM, George Dunlap <George.Dunlap@xxxxxxxxxxxxx> wrote:

> On 12/10/12 20:34, Keir Fraser wrote:
>> On 12/10/2012 19:53, "Andres Lagar-Cavilla" <andreslc@xxxxxxxxxxxxxx> wrote:
>> 
>>>> I don't see any dependency. And Tim has already proposed patches for
>>>> use-case 2, in fact, as you noted. So, shouldn't they simply be polished up
>>>> and applied as soon as possible? Basically, for mm type things, Tim is your
>>>> man, either as author or reviewer.
>>> Ok. Wanted to ascertain where we stand on things.
>>> 
>>> Tim's patches crash guests because there are all sorts of spinlocks being
>>> held. That's the gist of the mm work that needs to be done. And a separate
>>> discussion.
>> Yes, that's a *mm* can of worms. :) Tim is the first port of call, and
>> working out who actually does the work, and what work that is, will be the
>> the ensuing discussion.
> So does it make sense to track this on the 4.3 feature list (obviously with 
> "owner: ?" until that's sorted out)?  Andres, would the summary below be 
> accurate enough?
> 
> * Waitqueues for hypervisor accesses to shared frames which fail with -ENOMEM
>  owner: ?
>  status: First draft posted back in February, much more work to do.

I'd be more generic and say "wait queues for mm" (paging also needs this).

I don't know about "wait queues for mmio emulation" as a separate item.

Andres
> 
> -George
> 


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