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    SubjectRe: Is 386 processor still supported?
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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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