On Jan 10, 2011, at 11:25 AM, Santi Saez wrote:
> El 09/01/2011 16:31, Robert Heller escribió:
>
>> The kernel itself is optimized for the i686 processor. It is possible
>> to custom build a kernel for the i586, i486, or i386 if you really have
>> a processor that old.
>
> What is the sense of optimize a kernel for i686 and then distribute most
> of packages for i386?
>
> For example in CentOS-5:
>
> kernel-2.6.18-194.el5.i686.rpm
> php-5.1.6-27.el5.i386.rpm
> httpd-2.2.3-43.el5.centos.i386.rpm
> mysql-server-5.0.77-4.el5_4.2.i386.rpm
>
Most packages don't necessarily require the extra instructions in the 686. Routines like glibc, which are linked in at runtime, do get compiled for the 686.
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