Regards,
Mansha
On 9/19/07, Jiri Kosina <jikos@xxxxxxxx> wrote:
On Wed, 19 Sep 2007, Mansha Linux wrote:
> Could you please explain me why do we need the spinlocks on uniprocessor
> machines? Is this the only reason that the kernel is preemptive ?
Yes, spinlocks on UP are needed only for preemptible kernels -- they mark
points in which preemption should not be enabled.
On non-preempt UP kernel, spinlocks go away.
--
Jiri Kosina
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Regards
Mansing.
