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Code Issues Releases Wiki Activity

remove duplication of the page tables

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This commit is contained in:
Stefan Lankes 2016-01-04 17:28:51 +01:00
parent a7cb623747
commit c6878be07a
1 changed files with 7 additions and 14 deletions
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21
hermit/kernel/tasks.c
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@ -236,10 +236,6 @@ void NORETURN do_exit(int arg)
uint8_t flags = irq_nested_disable();
// Threads should delete the page table and the heap */
if (!curr_task->parent)
page_map_drop();
// decrease the number of active tasks
spinlock_irqsave_lock(&readyqueues[core_id].lock);
readyqueues[core_id].nr_tasks--;
@ -387,6 +383,7 @@ int create_task(tid_t* id, entry_point_t ep, void* arg, uint8_t prio, uint32_t c
uint32_t i;
void* stack = NULL;
void* counter = NULL;
task_t* curr_task;
if (BUILTIN_EXPECT(!ep, 0))
return -EINVAL;
@ -399,6 +396,8 @@ int create_task(tid_t* id, entry_point_t ep, void* arg, uint8_t prio, uint32_t c
if (BUILTIN_EXPECT(!readyqueues[core_id].idle, 0))
return -EINVAL;
curr_task = per_core(current_task);
stack = kmalloc(KERNEL_STACK_SIZE);
if (BUILTIN_EXPECT(!stack, 0))
return -ENOMEM;
@ -410,8 +409,6 @@ int create_task(tid_t* id, entry_point_t ep, void* arg, uint8_t prio, uint32_t c
}
atomic_int64_set((atomic_int64_t*) counter, 0);
kprintf("start new thread on core %d with stack address %p\n", core_id, stack);
spinlock_irqsave_lock(&table_lock);
for(i=0; i<MAX_TASKS; i++) {
@ -432,16 +429,9 @@ int create_task(tid_t* id, entry_point_t ep, void* arg, uint8_t prio, uint32_t c
task_table[i].lwip_err = 0;
task_table[i].page_lock = &page_lock;
task_table[i].page_map = curr_task->page_map;
task_table[i].user_usage = (atomic_int64_t*) counter;
/* Allocated new PGD or PML4 and copy page table */
task_table[i].page_map = get_pages(1);
if (BUILTIN_EXPECT(!task_table[i].page_map, 0))
goto out;
/* Copy page tables & user frames of current task to new one */
page_map_copy(&task_table[i]);
if (id)
*id = i;
//kprintf("Create task %d with pml4 at 0x%llx\n", i, task_table[i].page_map);
@ -469,6 +459,9 @@ int create_task(tid_t* id, entry_point_t ep, void* arg, uint8_t prio, uint32_t c
}
}
if (!ret)
kprintf("start new thread %d on core %d with stack address %p\n", i, core_id, stack);
out:
spinlock_irqsave_unlock(&table_lock);