linux-kernel - Re: [PATCH perf/core v10 07/23] perf probe: Add --cache option to cache the probe definitions

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Message-ID: <20160609141850.GO11589@kernel.org>
Date:	Thu, 9 Jun 2016 11:18:50 -0300
From:	Arnaldo Carvalho de Melo <acme@...nel.org>
To:	Masami Hiramatsu <mhiramat@...nel.org>
Cc:	linux-kernel@...r.kernel.org, Namhyung Kim <namhyung@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...hat.com>,
	Hemant Kumar <hemant@...ux.vnet.ibm.com>,
	Ananth N Mavinakayanahalli <ananth@...ux.vnet.ibm.com>,
	Brendan Gregg <brendan.d.gregg@...il.com>
Subject: Re: [PATCH perf/core v10 07/23] perf probe: Add --cache option to
 cache the probe definitions

Em Wed, Jun 08, 2016 at 06:30:10PM +0900, Masami Hiramatsu escreveu:
> @@ -2555,6 +2556,14 @@ static int __add_probe_trace_events(struct perf_probe_event *pev,
>  	}
>  	if (ret == -EINVAL && pev->uprobes)
>  		warn_uprobe_event_compat(tev);
> +	if (ret == 0 && probe_conf.cache) {
> +		cache = probe_cache__new(pev->target);
> +		if (cache) {
> +			probe_cache__add_entry(cache, pev, tevs, ntevs);
> +			probe_cache__commit(cache);

These two functions may fail, please check its return and forward errors
appropriately.

> +			probe_cache__delete(cache);