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Subject: 2.6.15-rt3 + Open Posix Test Suite
From: Daniel Walker <dwalker@mvista.com>
To: linux-kernel@vger.kernel.org
Cc: mingo@elte.hu
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Date: Tue, 10 Jan 2006 15:03:29 -0800
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	It's worth noting that a few tests in the current Open Posix Test Suite
hang RT systems. 

Specifically this test (hope this url comes through),

http://cvs.sourceforge.net/viewcvs.py/*checkout*/posixtest/posixtestsuite/conformance/interfaces/sched_setparam/10-1.c?rev=1.2

sched_setparam test 10-1.c and I think 9-1.c .

The 10-1 test spawns some children at SCHED_FIFO priority 99 , then runs
the following,

void child_process(){
	alarm(2);

	while(1) {
		(*shmptr)++;
		sched_yield();
	}
}

I'm sure this is what's hanging the system, the yield() is one issue.
Another is why the alarm() is never delivered .

Daniel