Jan Kiszka wrote:
> Gilles Chanteperdrix wrote:
>> Jan Kiszka wrote:
>>> Disabling SMP (on platforms where this isn't off by design already) is
>>> an optimization. In contrast, not enabling it by default is doomed to
>>> cause problems for users that run ./configure without looking into each
>>> and every switch - now that CONFIG_SMP is very important for all the
>>> fast locking stuff.
>> I would consider setting CONFIG_SMP by default on x86... because on some
>> other architectures like arm, it is not even yet a valid configuration.
> But it is on PowerPC or IA64. Would it cause troubles for the
> non-SMP-ready archs? Then we can disable it on those selectively.

Are you sure that the lock prefix on an UP x86 or lsync on an UP powerpc
is hamrless ?


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