Messages in this thread | | | Date | Mon, 22 Nov 2004 20:53:49 +0100 | From | Andi Kleen <> | Subject | Re: [Lse-tech] Re: scalability of signal delivery for Posix Threads |
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> Well, the sighand->siglock is taken so many places in the kernel (>200 > times) > that RCUing its usage looks like a daunting change to make.
Agreed. And having to wait for all CPUs in sigaction would also not be nice.
> > In principle, I guess a seqlock could be made to work. The idea would be
seqlocks are reader only, but for signal delivery you need a writer to update state like the thread load balancing. We got all that gunk from POSIX, before NPTL it would have been probably possible ;-)
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