Ingo Molnar a écrit :
+ if (unlikely(signal_pending(t) || need_resched()))
+ goto stop;
So, this is how you'll prevent me from running an infinite loop ;-)
The attached patch adds a cond_resched() instead, to allow infinite
loops without DoS. I dropped the unlikely() as it's already in the
definition of signal_pending().
+asmlinkage long sys_async_wait(unsigned long min_wait_events)
Here I would expect:
sys_async_wait_for_all(struct syslet_atom *atoms, long nr_atoms)
and
sys_async_wait_for_any(struct syslet_atom *atoms, long nr_atoms).
This way syslets can be used by different parts of a program without
having them waiting for each other.
Thanks.
--
Guillaume
--- linux-2.6/kernel/async.c
+++ linux-2.6/kernel/async.c
@@ -433,9 +433,10 @@
last_uatom = uatom;
ret = __exec_atom(t, &atom);
- if (unlikely(signal_pending(t) || need_resched()))
+ if (signal_pending(t))
goto stop;
+ cond_resched();
uatom = next_uatom(&atom, uatom, ret);
if (uatom)
goto run_next;
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