linux-kernel - Re: [PATCH 28/30] perf evsel: Provide a new constructor for tracepoints

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Date:	Tue, 25 Sep 2012 08:28:18 -0300
From:	Arnaldo Carvalho de Melo <acme@...radead.org>
To:	Namhyung Kim <namhyung@...nel.org>
Cc:	Ingo Molnar <mingo@...nel.org>, linux-kernel@...r.kernel.org,
	David Ahern <dsahern@...il.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Jiri Olsa <jolsa@...hat.com>, Mike Galbraith <efault@....de>,
	Paul Mackerras <paulus@...ba.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Stephane Eranian <eranian@...gle.com>,
	Steven Rostedt <rostedt@...dmis.org>
Subject: Re: [PATCH 28/30] perf evsel: Provide a new constructor for
 tracepoints

Em Tue, Sep 25, 2012 at 01:26:46PM +0900, Namhyung Kim escreveu:
> On Mon, 24 Sep 2012 12:59:42 -0300, Arnaldo Carvalho de Melo wrote:
> > +		if (size == alloc_size) {
> > +			alloc_size += BUFSIZ;
> > +			nbf = realloc(bf, alloc_size);
> > +			if (nbf == NULL)
> > +				goto out_free_bf;
> > +			bf = nbf;
> > +		}
> > +
> > +		n = read(fd, bf + size, BUFSIZ);
> 
> Wouldn't it be better doing s/BUFSIZ/alloc_size - size/ ?  Although
> there'll be no partial reading issue when working on debugfs I guess.

Yeah, don't know if that is worth it :-\

- Arnaldo
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