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Update donate_priority to only attempt to sort position of the donee that isn't waiting for a lock

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Themis Demetriades
2024-10-23 13:29:45 +01:00
parent d82176a2e2
commit a875d5fcb4
3 changed files with 24 additions and 7 deletions
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18
src/threads/thread.c
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@@ -465,10 +465,22 @@ thread_get_recent_cpu (void)
return 0;
}
/* Reinsert thread t into the ready list at its correct position
in descending order of priority. Used when this thread's priority
may have changed. */
void
ready_list_reorder (void)
ready_list_reinsert (struct thread *t)
{
list_sort (&ready_list, priority_more, NULL);
enum intr_level old_level = intr_disable ();
/* If the thread isn't ready to run, do nothing. */
if (t->status == THREAD_READY)
{
list_remove (&t->elem);
list_insert_ordered (&ready_list, &t->elem, priority_more, NULL);
}
intr_set_level (old_level);
}
/* Idle thread. Executes when no other thread is ready to run.
@@ -558,7 +570,7 @@ init_thread (struct thread *t, const char *name, int priority)
t->stack = (uint8_t *) t + PGSIZE;
t->base_priority = priority;
t->magic = THREAD_MAGIC;
list_init (&t->donors_list);
t->priority = t->base_priority;
t->waiting_lock = NULL;