Re:Spinlocks on Uniprocessor

[jiayinjia1983116]

As for as I know,when process/Thread is in runqueue,then may have allocate some 
resource even they do not running right now,In order to keep the data 
consistent(can not be modified by other processes/threads) ,we should use 
spinlock to protect the data.   
在2007-09-19，"Mansha Linux" <[EMAIL PROTECTED]> ：
Hi all,
Could  you please explain me why do we need the spinlocks on uniprocessor 
machines?
Is this the only reason that the kernel is preemptive ?
--
regards,
Mansha