I am trying to understand how to use mutex API's properly,so while going through the documentation,
there is section mentioning fast path and slow path for mutexes.
For your reference I am pasting this here.(kernel/mutex.c)
/*
* We split the mutex lock/unlock logic into separate fastpath and
* slowpath functions, to reduce the register pressure on the fastpath.
* We also put the fastpath first in the kernel image, to make sure the
* branch is predicted by the CPU as default-untaken.
*/
static __used noinline void __sched
__mutex_lock_slowpath(atomic_t *lock_count);
Can someone help me to understand what is the difference between fastpath lock and slowpath lock?
Thanks in advance
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