Date: Wed, 24 May 2000 19:08:00 -0700 (PDT) From: Matthew Dillon <dillon@apollo.backplane.com> To: Chuck Paterson <cp@bsdi.com> Cc: Terry Lambert <tlambert@primenet.com>, arch@FreeBSD.ORG Subject: Re: Preemptive kernel on older X86 hardware Message-ID: <200005250208.TAA78220@apollo.backplane.com> References: <200005250205.UAA16126@berserker.bsdi.com>
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We've had very good luck encapsulating our MP lock code in real
honest-to-god subroutines rather then trying to make them inline
macros.
On intel anyway, subroutine calls are *cheap*, especially compared
to the overhead of a locked instruction or even an L1 cache miss.
It's a no-brainer.
-Matt
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