linux-kernel - Re: [regression] sched_getaffinity fails with EINVAL in 2.6.31-rc4

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Date:	Mon, 27 Jul 2009 13:35:21 -0400 (EDT)
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Gregory Haskins <gregory.haskins@...il.com>
cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...e.hu>
Subject: Re: [regression] sched_getaffinity fails with EINVAL in 2.6.31-rc4



On Mon, 27 Jul 2009, Gregory Haskins wrote:

> I am not sure when this started, but noticed that sched_getaffinity is
> not working in -rc4.
> 
> [pid  6254] sched_getaffinity(0, 128, 0x7f80586b1fe0) = -1 EINVAL
> (Invalid argument)
> 
> Here is a simple program for reproduction:

Thanks,

I have a box available in which I can look at this further.

-- Steve

> 
> #include <sched.h>
> 
> int main(void)
> {
> 	cpu_set_t mask;
> 	int ret;
> 
> 	ret = sched_getaffinity(0, sizeof(mask), &mask);
> 	if (ret < 0)
> 		perror("getaffinity");
> 
> 	return ret;
> }
> 
> If I get time, I will bisect this later today.
> 
> Regards,
> -Greg
> 
> 
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