Study the implementation of spinlock and sleeplock in xv6. The relevant codes are in spinlock. {h,c} and sleeplock. {h,c}. Pay attention to the acquire, release, acquiresleep, and releasesleep ...

Spinlocks are Linux’s simplest mechanism for preventing two threads from changing the same data. A new kernel feature increases the fairness of spinlocks on SMP systems, preventing one thread from ...