Date: Sat, 29 Dec 2001 18:59:17 -0600 From: Alfred Perlstein <bright@mu.org> To: Michal Mertl <mime@traveller.cz> Cc: Matthew Dillon <dillon@apollo.backplane.com>, arch@freebsd.org Subject: Re: 64 bit counters Message-ID: <20011229185917.J16101@elvis.mu.org> In-Reply-To: <Pine.BSF.4.41.0112300114010.48350-100000@prg.traveller.cz>; from mime@traveller.cz on Sun, Dec 30, 2001 at 01:48:07AM %2B0100 References: <200112292016.fBTKGWR01735@apollo.backplane.com> <Pine.BSF.4.41.0112300114010.48350-100000@prg.traveller.cz>
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* Michal Mertl <mime@traveller.cz> [011229 18:49] wrote: > I doesn't seem too bad to me, but I do have a problem - I can't implement > real atomic 64 bit operations on an i386. It shouldn't be named atomic_XXX > if it isn't atomic. So that other people don't start to use it on <586 > with some variable which changes fast. > > What about making the counters not 64 bit, but the size of biggest atomic > type? Something like type u_maxatomic_t which would be 32 bit on <586 and > 64 bit otherwise. There would still be problem in determining at compile > time the size but we could choose the safe size if not somewhere defined > otherwise. > > I can make changes to my local tree but how should I send them someone for > review? Should I send them to arch? I tried to find the answer to this > question in developers's handbook but didn't find it. *laff* the concept of atomic_t was initially proposed by me over a year ago (i got the idea from linux) however it never seemed to get done. -- -Alfred Perlstein [alfred@freebsd.org] 'Instead of asking why a piece of software is using "1970s technology," start asking why software is ignoring 30 years of accumulated wisdom.' Tax deductable donations for FreeBSD: http://www.freebsdfoundation.org/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-arch" in the body of the message
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