On 15 May 2013, Jim Cromie uttered the following: > FWIW, linux has had the capability to patch itself at boot, > replacing slow instructions with fast ones > (article mentions memory-barriers and "mfence" on newer CPUs) > > http://lwn.net/Articles/164121/ > SMP alternatives > [Posted December 14, 2005 by corbet] > > so it may be that a 64bit kernel is just a 32bit kernel that can patch > itself up to run fast on 64bit machines.
It's not. The alternatives mechanism is nowhere near that pervasive: you'd need to replace almost every instruction! -- NULL && (void) _______________________________________________ Soekris-tech mailing list [email protected] http://lists.soekris.com/mailman/listinfo/soekris-tech
