From: Adrian Hunter <adrian.hunter@intel.com>
To: Ian Rogers <irogers@google.com>, Namhyung Kim <namhyung@kernel.org>
Cc: "Peter Zijlstra" <peterz@infradead.org>,
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llvm@lists.linux.dev
Subject: Re: [PATCH v3 09/18] perf ui: Update use of pthread mutex
Date: Sat, 27 Aug 2022 10:11:19 +0300 [thread overview]
Message-ID: <bdbd520a-b1c4-01c4-18bb-f1c2b553371d@intel.com> (raw)
In-Reply-To: <CAP-5=fWvf66snfmUfaTQ6BZ9EmsmBs0PUT8PAfehW74bnEE5nQ@mail.gmail.com>
On 26/08/22 23:52, Ian Rogers wrote:
> On Fri, Aug 26, 2022 at 1:40 PM Namhyung Kim <namhyung@kernel.org> wrote:
>>
>> On Fri, Aug 26, 2022 at 12:21 PM Adrian Hunter <adrian.hunter@intel.com> wrote:
>>>
>>> On 26/08/22 22:00, Namhyung Kim wrote:
>>>> On Fri, Aug 26, 2022 at 11:53 AM Adrian Hunter <adrian.hunter@intel.com> wrote:
>>>>> Below seems adequate for now, at least logically, but maybe it
>>>>> would confuse clang thread-safety analysis?
>>>>
>>>> I think it's not just about locks, the exit_browser should bail out early
>>>> if the setup code was not called.
>>>
>>> In those cases, use_browser is 0 or -1 unless someone has inserted
>>> an invalid perf config like "tui.script=on" or "gtk.script=on".
>>> So currently, in cases where exit_browser() is called without
>>> setup_browser(), it does nothing. Which means it is only the
>>> unconditional mutex_destroy() that needs to be conditional.
>>
>> Yeah there's a possibility that it can be called with > 0 use_browser
>> on some broken config or something. So I think it's safer and better
>> for future changes.
>
> I'd thought about a:
> static bool ui__lock_initialized;
> but the issue is shouldn't it be atomic?
No, it is only accessed from the main thread.
next prev parent reply other threads:[~2022-08-27 7:11 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-24 15:38 [PATCH v3 00/18] Mutex wrapper, locking and memory leak fixes Ian Rogers
2022-08-24 15:38 ` [PATCH v3 01/18] perf mutex: Wrapped usage of mutex and cond Ian Rogers
2022-08-26 8:49 ` Adrian Hunter
2022-08-24 15:38 ` [PATCH v3 02/18] perf bench: Update use of pthread mutex/cond Ian Rogers
2022-08-24 15:38 ` [PATCH v3 03/18] perf tests: Avoid pthread.h inclusion Ian Rogers
2022-08-24 15:38 ` [PATCH v3 04/18] perf hist: Update use of pthread mutex Ian Rogers
2022-08-24 15:38 ` [PATCH v3 05/18] perf bpf: Remove unused pthread.h include Ian Rogers
2022-08-24 15:38 ` [PATCH v3 06/18] perf lock: " Ian Rogers
2022-08-24 15:38 ` [PATCH v3 07/18] perf record: Update use of pthread mutex Ian Rogers
2022-08-24 15:38 ` [PATCH v3 08/18] perf sched: " Ian Rogers
2022-08-24 15:38 ` [PATCH v3 09/18] perf ui: " Ian Rogers
2022-08-26 10:11 ` Adrian Hunter
2022-08-26 16:01 ` Ian Rogers
2022-08-26 10:24 ` Adrian Hunter
2022-08-26 16:02 ` Ian Rogers
2022-08-26 17:22 ` Adrian Hunter
2022-08-26 17:45 ` Ian Rogers
2022-08-26 18:52 ` Adrian Hunter
2022-08-26 19:00 ` Namhyung Kim
2022-08-26 19:20 ` Adrian Hunter
2022-08-26 20:40 ` Namhyung Kim
2022-08-26 20:52 ` Ian Rogers
2022-08-27 7:11 ` Adrian Hunter [this message]
2022-08-24 15:38 ` [PATCH v3 10/18] perf mmap: Remove unnecessary pthread.h include Ian Rogers
2022-08-24 15:38 ` [PATCH v3 11/18] perf dso: Update use of pthread mutex Ian Rogers
2022-08-26 10:37 ` Adrian Hunter
2022-08-26 16:05 ` Ian Rogers
2022-08-26 17:34 ` Adrian Hunter
2022-08-26 17:46 ` Ian Rogers
2022-08-24 15:38 ` [PATCH v3 12/18] perf annotate: " Ian Rogers
2022-08-24 15:38 ` [PATCH v3 13/18] perf top: " Ian Rogers
2022-08-24 15:38 ` [PATCH v3 14/18] perf dso: Hold lock when accessing nsinfo Ian Rogers
2022-08-24 15:38 ` [PATCH v3 15/18] perf mutex: Add thread safety annotations Ian Rogers
2022-08-26 11:12 ` Adrian Hunter
2022-08-26 16:45 ` Arnaldo Carvalho de Melo
2022-08-26 17:00 ` Ian Rogers
2022-08-26 19:13 ` Arnaldo Carvalho de Melo
2022-08-24 15:38 ` [PATCH v3 16/18] perf sched: Fixes for thread safety analysis Ian Rogers
2022-08-26 12:12 ` Adrian Hunter
2022-08-26 16:06 ` Ian Rogers
2022-08-26 17:41 ` Adrian Hunter
2022-08-26 17:48 ` Ian Rogers
2022-08-26 18:26 ` Namhyung Kim
2022-08-26 19:35 ` Adrian Hunter
2022-08-26 20:48 ` Namhyung Kim
2022-08-24 15:39 ` [PATCH v3 17/18] perf top: " Ian Rogers
2022-08-24 15:39 ` [PATCH v3 18/18] perf build: Enable -Wthread-safety with clang Ian Rogers
[not found] ` <CA+JHD906M0truH7wPNZ=eJwdCA=qLhYDonUx_ZQBwJYpiX1hNg@mail.gmail.com>
2022-08-25 16:14 ` [PATCH v3 00/18] Mutex wrapper, locking and memory leak fixes Adrian Hunter
2022-08-26 12:36 ` Adrian Hunter
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