Messages in this thread | | | Date | Tue, 19 Feb 2008 02:49:12 +0100 | From | Nick Piggin <> | Subject | Re: IO queueing and complete affinity w/ threads: Some results |
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On Mon, Feb 18, 2008 at 02:33:17PM +0100, Andi Kleen wrote: > Jens Axboe <jens.axboe@oracle.com> writes: > > > and that scrapping the remote > > softirq trigger stuff is sanest. > > I actually liked Nick's queued smp_function_call_single() patch. So even > if it was not used for block I would still like to see it being merged > in some form to speed up all the other IPI users.
Yeah, that hasn't been forgotten (nor have your comments about folding my special function into smp_call_function_single).
The call function path is terribly unscalable at the moment on a lot of architectures, and also it isn't allowed to be used with interrupts off due to deadlock (which the queued version can allow, provided that wait=0).
I will get around to sending that upstream soon.
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