On Mon, Jan 24, 2011 at 6:25 PM, John Reiser <jreiser@xxxxxxxxxxxx> wrote: > On 01/24/2011 07:43 AM, drago01 wrote: >> On Mon, Jan 24, 2011 at 3:32 PM, Sergio Belkin <sebelk@xxxxxxxxx> wrote: >>> Hi, >>> >>> I've read on http://fedoraproject.org/wiki/Packaging:RPMMacros#Build_flags_macros_and_variables >>> that mtune=atom. Just because I'm curious, why? :) >> >> Why not? >> >> It is the only 32bit only CPU still being sold, > > There are plenty of machines with 32-bit only CPUs (such as early Celeron, > Pentium socket 478, even some Core Duos [Apple Mini]) which run Fedora very well. > Many are less than 5 years old. In the US, that means the depreciation rules > of tax law strongly encourage their continued use. Does not contradict what I said "still being sold" ... I didn't say they do not exist. >> and it does not seem >> to hurt others anyway (and most of them should use x86_64 anyway), > > Actually many of them should be using the new x86_32 software architecture, > which is the 64-bit instruction set (thus 16 "general" registers, SSE, ...) > but with integers, longs, and pointers all 32 bits. The upper 32 bits > of any user address are 0, and not stored in RAM (except the return address > of CALL.) This gives a measurable benefit on boxes with low RAM. Ignoring netbooks/nettops boxes with "low RAM" aren't being sold either ;) -- devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxxx https://admin.fedoraproject.org/mailman/listinfo/devel
