Messages in this thread | | | Date | Tue, 29 Jul 2008 16:43:59 -0700 | From | Jeremy Fitzhardinge <> | Subject | Re: [PATCH 2/2] x86: implement multiple queues for smp function call IPIs |
| |
Jeremy Fitzhardinge wrote: > This adds 8 queues for smp_call_function(), in order to avoid a > bottleneck on a single global lock and list for function calls. When > initiating a function call, the sender chooses a queue based on its > own processor id (if there are more than 8 processors, they hash down > to 8 queues). It then sends an IPI to the corresponding vector for > that queue to each target CPU. The target CPUs use the vector number > to determine which queue they should scan for work.
I should point out that this patch depends on the earlier tlb.c unification patch, since it recycles the IPI vectors that series freed up.
J
| |