Re: [PATCH 0/4] AHCI: Conserve interrupts withpci_enable_msi_block_part() interface

[Alexander Gordeev]

On Tue, Sep 03, 2013 at 10:09:54AM -0400, Tejun Heo wrote:
> On Tue, Sep 03, 2013 at 09:55:41AM -0400, Tejun Heo wrote:
> > Hmmm.... I've been looking at the code and and a curiosity.  Why does
> > multiple MSI support implicitly enabled threaded IRQ handling?  Why
> > are those two linked?  Also, do you have any numbers to show that this
> > actually is better?  Handling the processing off to a thread isn't a
> > light operation.
> 
> Also, it probably is a good idea to skip dummy ports when requesting
> irqs from ahci_host_activate(), which BTW should probably be renamed
> to ahci_host_activate_mmsi().

Hmm.. that is actually a great idea. What I am not sure about whether is
a dummy port still can send (spurious?) interrupts? The hardware interrupt
handler would have to be reworked then. Seems as a yet another topic to me ;)

> -- 
> tejun

-- 
Regards,
Alexander Gordeev
agordeev@xxxxxxxxxx
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