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Some not-very-well working progress on grouply exit.

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Going to start from scratch.
This commit is contained in:
Bahadir Balban
2009-10-30 19:52:52 +02:00
parent ee7621b2df
commit f3c0a38fa9
7 changed files with 39 additions and 69 deletions
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48
src/generic/scheduler.c
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@@ -262,6 +262,7 @@ void tcb_delete_schedule(void)
*/
void sched_die_pager(void)
{
printk("Pager (%d) Exiting...\n", current->tid);
/* Remove from its list, callers get -ESRCH */
tcb_remove(current);
@@ -301,7 +302,7 @@ void sched_die_pager(void)
*/
void sched_die_child(void)
{
int err;
int locked;
/*
* Find pager, he _must_ be there because he never
@@ -309,9 +310,10 @@ void sched_die_child(void)
*/
struct ktcb *pager = tcb_find(current->pagerid);
/* Lock its task_dead queue */
if ((err = mutex_lock(&pager->task_dead.list_lock)) < 0)
return err;
do {
/* Busy spin without disabling preemption */
locked = mutex_trylock(&pager->task_dead_mutex);
} while (!locked);
/* Remove from container task list,
* callers get -ESRCH */
@@ -335,7 +337,7 @@ void sched_die_child(void)
* Add self to pager's dead tasks list,
* to be deleted by pager
*/
__ktcb_list_add_nolock(current, &pager->task_dead);
list_insert(&current->task_list, &pager->task_dead_list);
/* Now quit the scheduler */
preempt_disable();
@@ -356,21 +358,17 @@ void sched_die_child(void)
* Unlock task_dead queue,
* pager can safely delete us
*/
mutex_unlock(&pager->task_dead.list_lock);
mutex_unlock(&pager->task_dead_mutex);
schedule();
BUG();
}
void sched_die_sync(void)
{
/*
* Infinitely retry if mutexes get interrupted
*/
while (1)
if (current->tid == current->pagerid)
sched_die_pager();
else
sched_die_child();
if (current->tid == current->pagerid)
sched_die_pager();
else
sched_die_child();
}
/*
@@ -397,17 +395,6 @@ void sched_suspend_sync(void)
BUG_ON(scheduler.prio_total < 0);
preempt_enable();
/*
* Async wake up any waiting pagers
*
* If we're not a pager, then a pager must have
* signalled us to suspend, and it must have been
* waiting for us to wake it up when we suspend.
* We do it here.
*
* If though, we _are_ a pager that is suspending,
* we silently do so. Noone is waiting us.
*/
if (current->pagerid != current->tid)
wake_up(&current->wqh_pager, 0);
@@ -426,17 +413,6 @@ void sched_suspend_async(void)
/* This will make sure we yield soon */
preempt_enable();
/*
* Async wake up any waiting pagers
*
* If we're not a pager, then a pager must have
* signalled us to suspend, and it must have been
* waiting for us to wake it up when we suspend.
* We do it here.
*
* If though, we _are_ a pager that is suspending,
* we silently do so. Noone is waiting us.
*/
if (current->pagerid != current->tid)
wake_up_task(tcb_find(current->pagerid), 0);