Date: Thu, 20 May 1999 20:25:45 +0100 (BST) From: Doug Rabson <dfr@nlsystems.com> To: Peter Wemm <peter@netplex.com.au> Cc: Tommy Hallgren <thallgren@yahoo.com>, freebsd-hackers@freebsd.org Subject: Re: Lazy SPLs Message-ID: <Pine.BSF.4.05.9905202024370.509-100000@herring.nlsystems.com> In-Reply-To: <19990520114148.9EF951F5A@spinner.netplex.com.au>
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On Thu, 20 May 1999, Peter Wemm wrote: > Tommy Hallgren wrote: > > Hi! > > > > I'm reading http://www.BSDI.COM/products/internet/40-qna.mhtml#Q5 and found t > he > > following peice of text: > > > > "Lazy SPLs - The kernel no longer masks hardware events unless a hardware eve > nt > > actually occurs, avoiding many expensive operations." > > > > Does anyone know what this is? > > Exactly what it says.. We've been doing it for as long as I can remember, > at least as far back as 2.0.5, probably as far back as 1.x. My earliest memory of it was as "Bruce's new interrupt code" for 386bsd. It was part of the 386bsd patchkit I think. -- Doug Rabson Mail: dfr@nlsystems.com Nonlinear Systems Ltd. Phone: +44 181 442 9037 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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