Re: [Qemu-devel] [RFC][PATCH 12/45] msi: Introduce MSIRoutingCache

[Avi Kivity]

On 10/17/2011 01:31 PM, Jan Kiszka wrote:
> > 
> > Just to make sure I understand this completely:  a hash table indexed by
> > MSIMessage in kvm code would avoid this?  You'd just allocate on demand
> > when seeing a new MSIMessage and free on an LRU basis, avoiding pinned
> > entries.
> > 
> > I'm not advocating this (yet), just want to understand the tradeoffs.
>
> Practically, that may work. I just wanted to avoid searching. And for
> static routes (irqfd, device assigment) you still need caches anyway, so
> I decided to use them consistently.

Okay.  Even if we do decide to go for transparent caches, it should be
done after this is merged, to avoid excessive churn.

-- 
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