[openib-general] [PATCH] mthca: eq doorbell coalescing + prevent even queque overrun

[Or Gerlitz]

Michael S. Tsirkin wrote:
>> Sorry, i dont follow. If you arm the CQ when there is one WC in it and 
>> then start polling, and during your polling a "second" WC is generated 
>> by the HCA, wouldn't an interrupt related to the 2nd completion be 
>> generated - why the case you are mentioning is the arming window?

> I'm polling in the interrupt handler, so interrupts from the same IRQ are
> disabled. No? What am I missing?

OK, i might be somehow newbee around this (working in hard irq context) 
land. Does disabling the HCA IRQ means no interrupt would be generated 
later when the handler is done? i was think it would be just deffered.

iSER hard irq CQ handler just does a context jump to soft irq handler 
(tasklet) so the rule you mention does not apply to it.