Re: [Xen-devel] Cpu pools discussion

[Juergen Gross <juergen.gross@xxxxxxxxxxxxxx>]

Keir Fraser wrote:
> On 29/07/2009 12:06, "Juergen Gross" <juergen.gross@xxxxxxxxxxxxxx> wrote:
> 
>> Would you feel better if I'd try to eliminate the reason for cpupool_borrow?
>> This function is needed only for continue_hypercall_on_cpu outside of the
>> current pool. I think it should be possible to replace those by
>> on_selected_cpus with less impact on the whole system.
> 
> Some of the stuff in the continuation handlers cannot be executed in irq
> context. 'Fixing' that would make many of the users ugly and less
> maintainable, so getting borrow/return right is the better answer I think.

The alternative would be a tasklet set up in irq.
And we are speaking of 3 users.
I could try a patch and then we could compare the two solutions. What do you
think?


Juergen

-- 
Juergen Gross                 Principal Developer Operating Systems
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Fujitsu Technolgy Solutions               e-mail: juergen.gross@xxxxxxxxxxxxxx
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