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Commit fc9ffb9c authored by Arnaldo Carvalho de Melo's avatar Arnaldo Carvalho de Melo
Browse files

perf cgroup: Introduce cgroup__get() 

The refcount operation counterpart to cgroup__put(), use it when reusing
a cgroup.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Wang Nan <wangnan0@huawei.com>
Link: https://lkml.kernel.org/n/tip-14ynvrl7y2cz8gyuy5q5v41g@git.kernel.org


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent a53b6460

tools/perf/util/cgroup.c

+10 −6
Original line number Diff line number Diff line
@@ -99,15 +99,12 @@ static int add_cgroup(struct perf_evlist *evlist, char *str) 
	 * check if cgrp is already defined, if so we reuse it

	 */

	evlist__for_each_entry(evlist, counter) {

		cgrp = counter->cgrp;

		if (!cgrp)

		if (!counter->cgrp)

			continue;

		if (!strcmp(cgrp->name, str)) {

			refcount_inc(&cgrp->refcnt);

		if (!strcmp(counter->cgrp->name, str)) {

			cgrp = cgroup__get(counter->cgrp);

			break;

		}



		cgrp = NULL;

	}



	if (!cgrp) {
@@ -157,6 +154,13 @@ void cgroup__put(struct cgroup *cgrp) 
	}

}



struct cgroup *cgroup__get(struct cgroup *cgroup)

{

       if (cgroup)

		refcount_inc(&cgroup->refcnt);

       return cgroup;

}



int parse_cgroups(const struct option *opt, const char *str,

		  int unset __maybe_unused)

{

tools/perf/util/cgroup.h

+1 −0
Original line number Diff line number Diff line
@@ -15,6 +15,7 @@ struct cgroup { 


extern int nr_cgroups; /* number of explicit cgroups defined */



struct cgroup *cgroup__get(struct cgroup *cgroup);

void cgroup__put(struct cgroup *cgroup);



int parse_cgroups(const struct option *opt, const char *str, int unset);