* Lee Revell <[EMAIL PROTECTED]> wrote:
> OK. Rereading my old mail, it looks like there were some possibly
> unresolved false positives with the userspace atomicity debugger.
>
> Here's one I get from alsaplayer. Would more information be required
> to know if this is a false positive?
this is a false positive that only triggers if PREEMPT_RT is disabled.
Does the patch below fix it? (i've also updated the -37-03 patch that
includes it.)
Ingo
--- linux/lib/rwsem.c.orig
+++ linux/lib/rwsem.c
@@ -169,6 +169,8 @@ rwsem_down_failed_common(struct rw_semap
/* wait to be given the lock */
for (;;) {
+ unsigned long nosched_flag = current->flags & PF_NOSCHED;
+
if ((sleep_state == TASK_INTERRUPTIBLE) &&
signal_pending(current)) {
spin_lock(&sem->wait_lock);
@@ -181,7 +183,10 @@ rwsem_down_failed_common(struct rw_semap
}
if (!waiter->task)
break;
+
+ current->flags &= ~PF_NOSCHED;
schedule();
+ current->flags |= nosched_flag;
set_task_state(tsk, sleep_state);
}
-
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