Bug 125645

Description of problem:
spt.sched_priority=5;
x=pthread_setschedparam(pthread_self(),SCHED_FIFO,&spt); assert(x==0);
x=pthread_create(&pt,NULL,p,(void *)1234);

according to the man page the
default "schedpolicy" is OTHER
default "schedparam" is 0 and most importantly
default "inheritsched" is EXPLICIT

thus policy of pt should be OTHER and priority 0
instead policy is FIFO and priority is 5

The error induces a context switch on every create which is very
undesirable for master:multiple-worker paradigms


Version-Release number of selected component (if applicable):
2.3.3 stable

How reproducible: Easy


Steps to Reproduce:
#include "pthread.h"
#include <stdio.h>
#include <assert.h>

void *p(void *arg) {
	int i,x; 
	struct sched_param spt={0};
	x=pthread_getschedparam(pthread_self(),&i,&spt);
	assert(x==0);
	printf("p policy=%d priority=%d\n",i,spt.sched_priority);
	pthread_exit((void *)8765);
	return NULL;
}

int main(int argc, char* argv[])
{
	int i,x=0;
	pthread_t pt;
	void *out;
	struct sched_param spt={0};
	x=pthread_getschedparam(pthread_self(),&i,&spt);
	assert(x==0);
	spt.sched_priority=5;
x=pthread_setschedparam(pthread_self(),SCHED_FIFO,&spt); assert(x==0);
	x=pthread_create(&pt,NULL,p,(void *)1234);
	assert(x==0);
	x=pthread_join(pt,&out);
	assert(x==0);
	return 0;
}

  
Actual results:
p policy=0 priority=5


Expected results:
p policy=0 priority=0


Additional info:
Must run as superuser to test.