Date: Wed, 20 Oct 2004 16:30:41 -0400 From: John Baldwin <jhb@FreeBSD.org> To: Pawel Jakub Dawidek <pjd@FreeBSD.org> Cc: obrien@FreeBSD.org Subject: Re: cvs commit: src/lib/libc/i386/net htonl.S ntohl.S Message-ID: <200410201630.41500.jhb@FreeBSD.org> In-Reply-To: <20041020202004.GM73767@darkness.comp.waw.pl> References: <4175B591.4090407@elischer.org> <200410201553.40823.jhb@FreeBSD.org> <20041020202004.GM73767@darkness.comp.waw.pl>
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On Wednesday 20 October 2004 04:20 pm, Pawel Jakub Dawidek wrote: > On Wed, Oct 20, 2004 at 03:53:40PM -0400, John Baldwin wrote: > +> For 6.0 we are (finally!) going to just drop 80386 altogether. I've > been +> wanting to do this personally since early SMPng days, but we came > to an +> agreement back then and since we've already gone and branched > RELENG_5 and +> frozen the ABI I think we should stick to the previously > agreed-upon plan. > > So maybe it is good time to think about 486 in 6.x. > I don't know how much can we get from dropping support for 486, but maybe > it's worth it. > Before the next war will start, the good argument for me is, that > FreeBSD 5.x is still going to work on 486 and we should move on. There's not a whole lot to gain from dropping 486. 486 added cmpxchg (biggie for SMP stuff), invlpg (better TLB shootdowns), bswap, and a few other odds and ends. The changes that later processors bring are less dramatic and more specialized, so it's less of an issue. -- John Baldwin <jhb@FreeBSD.org> <>< http://www.FreeBSD.org/~jhb/ "Power Users Use the Power to Serve" = http://www.FreeBSD.org
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