linux-kernel - Re: [PATCH 14/37] perf tools: Convert dead thread list into rbtree

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Date:	Fri, 26 Dec 2014 10:14:10 -0700
From:	David Ahern <dsahern@...il.com>
To:	Namhyung Kim <namhyung@...nel.org>, Jiri Olsa <jolsa@...hat.com>
CC:	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Ingo Molnar <mingo@...nel.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	LKML <linux-kernel@...r.kernel.org>,
	Stephane Eranian <eranian@...gle.com>,
	Adrian Hunter <adrian.hunter@...el.com>,
	Andi Kleen <andi@...stfloor.org>,
	Frederic Weisbecker <fweisbec@...il.com>
Subject: Re: [PATCH 14/37] perf tools: Convert dead thread list into rbtree

On 12/25/14 7:26 PM, Namhyung Kim wrote:
>>> diff --git a/tools/perf/util/thread.h b/tools/perf/util/thread.h
>>> index 0b6dcd70bc8b..413f28cf689b 100644
>>> --- a/tools/perf/util/thread.h
>>> +++ b/tools/perf/util/thread.h
>>> @@ -11,10 +11,8 @@
>>>   struct thread_stack;
>>>
>>>   struct thread {
>>> -     union {
>>> -             struct rb_node   rb_node;
>>> -             struct list_head node;
>>> -     };
>>> +     struct rb_node          rb_node;
>>> +     struct list_head        node;
>>>        struct map_groups       *mg;
>>>        pid_t                   pid_; /* Not all tools update this */
>>>        pid_t                   tid;
>>> @@ -22,7 +20,8 @@ struct thread {
>>>        int                     cpu;
>>>        char                    shortname[3];
>>>        bool                    comm_set;
>>> -     bool                    dead; /* if set thread has exited */
>>> +     bool                    exited; /* if set thread has exited */
>>> +     bool                    dead; /* thread is in dead_threads list */
>>
>> looks like this also changes the logic (new exited flag),
>> not just the dead threads storage wheel
>
> AFAICS the 'dead' flag is not used other than thread__exited().  And
> it confused me a dead thread might not be in a dead_threads tree (or
> list).  So I changed the name and no logical change intended.

git show 236a3bbd5cb51

David

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