Date: Fri, 09 Jul 2010 20:31:42 +0200 From: Gabor PALI <pgj@FreeBSD.org> To: Robert Watson <rwatson@FreeBSD.org> Cc: svn-src-head@freebsd.org Subject: Re: svn commit: r209119 - head/sys/sys Message-ID: <4C376B0E.9050505@FreeBSD.org>
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On 06/18/10 14:08, Robert Watson wrote: > The only reservation I have, really, is that 64-bit writes are non-atomic on > i386 and other 32-bit architectures (or, at least, I think they are). This > means DPCPU_SUM may encounter non-atomicity rather than just staleness in the > values it reads as it iterates. That said, we should probably use 64-bit > anyway, because 32-bit counters are gauche. :-) What is about introducing 64-bit atomic counters? Cheers, :g
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