Messages in this thread Patch in this message | | | Date | Wed, 27 May 2015 09:50:33 -0700 | From | tip-bot for Arnaldo Carvalho de Melo <> | Subject | [tip:perf/core] perf machine: Mark removed threads as such |
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Commit-ID: 0170b14f5f5462524d05ee96275b7a0a0d34ae77 Gitweb: http://git.kernel.org/tip/0170b14f5f5462524d05ee96275b7a0a0d34ae77 Author: Arnaldo Carvalho de Melo <acme@redhat.com> AuthorDate: Mon, 25 May 2015 15:23:05 -0300 Committer: Arnaldo Carvalho de Melo <acme@redhat.com> CommitDate: Wed, 27 May 2015 12:21:45 -0300
perf machine: Mark removed threads as such
We use:
BUG_ON(!RB_EMPTY_NODE(&thread->rb_node));
in the thread destructor as a debugging check to find out about possibly still referenced thread instances being deleted, to do that we need to make sure we use RB_CLEAR_NODE() right after rb_erase(), i.e. that we use the newly introduced rb_erase_init(), that works just like list_del_init().
Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: David Ahern <dsahern@gmail.com> Cc: Don Zickus <dzickus@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-4fcqo5ypy1cjjf15ilb0hn78@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> --- tools/perf/util/machine.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c index 7ec3188..6bf8457 100644 --- a/tools/perf/util/machine.c +++ b/tools/perf/util/machine.c @@ -400,7 +400,7 @@ static struct thread *____machine__findnew_thread(struct machine *machine, * leader and that would screwed the rb tree. */ if (thread__init_map_groups(th, machine)) { - rb_erase(&th->rb_node, &machine->threads); + rb_erase_init(&th->rb_node, &machine->threads); RB_CLEAR_NODE(&th->rb_node); thread__delete(th); return NULL; @@ -1314,7 +1314,7 @@ static void __machine__remove_thread(struct machine *machine, struct thread *th, BUG_ON(atomic_read(&th->refcnt) == 0); if (lock) pthread_rwlock_wrlock(&machine->threads_lock); - rb_erase(&th->rb_node, &machine->threads); + rb_erase_init(&th->rb_node, &machine->threads); RB_CLEAR_NODE(&th->rb_node); /* * Move it first to the dead_threads list, then drop the reference,
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