Re: [PATCH 2/2] x86: implement multiple queues for smp function callIPIs

[Jeremy Fitzhardinge]

Ingo Molnar wrote:
> Yes on the 64-bit side we've had NUM_INVALIDATE_TLB_VECTORS (==8) for a 
> long time, but note that 64-bit is obviously for more modern CPUs. What 
> i'm mindful about (i'm not _that_ worried) are fragile APICs and unknown 
> erratas.
>   

Well, the whole exercise is only useful if you have a relatively large 
number of CPUs, which presumably means you have relatively modern 
APICs.  If we set the number of queues to 1 for < 4 CPUs, would that 
avoid the problem APICs?

   J
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/