Re: [Xen-devel] [PATCH] Re-enable MSI support

[Keir Fraser <keir.fraser@xxxxxxxxxxxxx>]

On 10/12/2008 17:01, "Espen Skoglund" <espen.skoglund@xxxxxxxxxxxxx> wrote:

>> Ahh, yes, I didn't realize this. So how do you think changing it to
>> spinlock, since it is not performance ciritical. Or do you know how
>> much benifit for read_lock?
> 
> It may not be performance critical, but I don't particularly like
> seeing big global locks introduced.  By the looks of it this lock
> would also protect everything related to interrupt management.

A global lock on control-plane operations such as add/remove/assign seems
okay to me. On data path operations such as interrupt handlers then
obviously not.

 -- Keir



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