Re: [PATCH RFC 0/9] Implement handling of RH=1 for MSI delivery in KVM

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2015-03-14 18:00-0600, James Sullivan:
> * DM=1, RH=0  : Logical destination mode without redirection. Interrupt
>                     is delivered to all LAPICs in the logical group 
>                     specified by the IRQ's destination map and delivery
>                     mode.

Your previous patch changed this case to physical.
(Mention in the cover letter what unmerged patches you depend on.)

> Let me know your thoughts.

Please document changes in their commits;  the information in cover
letter is virtually lost (git sucks at handling series).
If you feel like you would be repeating yourself, or have nothing to say
at all, it is a signal for rethinking the division.

The "logical change" of each patch doesn't need to be minimal -- we seek
the perfect balance between the number of patches, hunks in them, and
their complexity.  I don't see a need for more than two patches here:
 1) introduce and initialize msi_redir_hint [1-5,9/9]
 2) use msi_redir_hint for lowest-priority delivery [6-8/9]

I think it would be better to rename the kvm_is_dm_lowest_prio() helper,
check for msi_redir_hint there, move it to a header, and use in
kvm_irq_delivery_to_apic_fast() too.

Thanks.
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