Messages in this thread | | | Date | Thu, 05 Jan 2006 17:36:42 -0600 | From | Joel Schopp <> | Subject | Re: [patch 00/21] mutex subsystem, -V14 |
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>>Here is a first pass at a powerpc file for the fast paths just as an FYI/RFC. >>It is completely untested, but compiles. > > > Shouldn't you make that "isync" dependent on SMP too? UP doesn't need it, > since DMA will never matter, and interrupts are precise. > > Linus >
I think the isync is necessary to keep heavily out of order processors from getting ahead of themselves even on UP. Scanning back through the powerpc spinlock code they seem to take the same view there as well. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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