Messages in this thread | | | Subject | Re: Is 386 processor still supported? | From | Peter Zijlstra <> | Date | Thu, 08 Jan 2009 15:27:13 +0100 |
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On Thu, 2009-01-08 at 15:21 +0100, Jiri Kosina wrote: > On Thu, 8 Jan 2009, Peter Zijlstra wrote: > > > > Subject: x86: make spinlocks available on machines without xadd insn > > > Current kernel wouldn't compile on ancient x86 machines that don't support > > > xadd instruction, as ticket spinlocks implementation unconditionally uses > > > it. > > > On machines without CONFIG_X86_XADD, use old-style byte spinlock > > > implementation instead. > > afaik we don't support i386-smp and up spinlocks are trivial > > preempt_disable() calls. > > Hmm. Where in Kconfig is SMP for M386 not allowed?
Dunno, kconfig is too much of a jungle for a simple person like me ;-)
But afaik i386 (and possibly i486) don't support nearly enough for a modern SMP system.
Alan used to have i486-smp I think, one of the very few ever made.
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