linux-kernel - Re: [PATCH 1/4] perf: Allow ability to map cpus to nodes easily

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Message-ID: <20140406121952.GD1164@krava.brq.redhat.com>
Date:	Sun, 6 Apr 2014 14:19:52 +0200
From:	Jiri Olsa <jolsa@...hat.com>
To:	Don Zickus <dzickus@...hat.com>
Cc:	acme@...stprotocols.net, LKML <linux-kernel@...r.kernel.org>,
	jmario@...hat.com, fowles@...each.com
Subject: Re: [PATCH 1/4] perf: Allow ability to map cpus to nodes easily

On Mon, Mar 31, 2014 at 10:39:44PM -0400, Don Zickus wrote:
> On Sat, Mar 29, 2014 at 06:10:33PM +0100, Jiri Olsa wrote:
> > > +/* Determine highest possible node in the system for sparse allocation */
> > > +static void set_max_node_num(void)
> > > +{
> > > +	FILE *fp;
> > > +	int ret = -1;
> > > +
> > > +	/* set up default */
> > > +	max_node_num = 8;
> > > +
> > > +	/* get the highest possible cpu number for a sparse allocation */
> > > +	fp = fopen("/sys/devices/system/node/possible", "r");
> > > +	if (!fp)
> > > +		goto out;
> > 
> > any reason why not put fopen/fclose into __set_max_num ?
> 
> I either had to pass in a path string pointer or a file pointer, I just
> chose a file pointer.  Thought it fit with the rest of perf passing FPs
> around. :-D  It doesn't matter to me either way.

well, if there's no need to call it extra then the function can do it

jirka
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