Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
Message-ID: <c422c9b3-d6e2-e1d5-5273-6a720fdde6c4@intel.com>
Date:   Thu, 25 Aug 2022 19:14:47 +0300
MIME-Version: 1.0
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101
 Firefox/91.0 Thunderbird/91.11.0
Subject: Re: [PATCH v3 00/18] Mutex wrapper, locking and memory leak fixes
Content-Language: en-US
To:     Arnaldo Carvalho de Melo <arnaldo.melo@gmail.com>,
        Ian Rogers <irogers@google.com>
Cc:     Peter Zijlstra <peterz@infradead.org>,
        Ingo Molnar <mingo@redhat.com>,
        Arnaldo Carvalho de Melo <acme@kernel.org>,
        Mark Rutland <mark.rutland@arm.com>,
        Alexander Shishkin <alexander.shishkin@linux.intel.com>,
        Jiri Olsa <jolsa@kernel.org>,
        Namhyung Kim <namhyung@kernel.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        Darren Hart <dvhart@infradead.org>,
        Davidlohr Bueso <dave@stgolabs.net>,
        =?UTF-8?Q?Andr=c3=a9_Almeida?= <andrealmeid@igalia.com>,
        Nathan Chancellor <nathan@kernel.org>,
        Nick Desaulniers <ndesaulniers@google.com>,
        Tom Rix <trix@redhat.com>, Weiguo Li <liwg06@foxmail.com>,
        Athira Rajeev <atrajeev@linux.vnet.ibm.com>,
        Thomas Richter <tmricht@linux.ibm.com>,
        Ravi Bangoria <ravi.bangoria@amd.com>,
        Dario Petrillo <dario.pk1@gmail.com>,
        Hewenliang <hewenliang4@huawei.com>,
        yaowenbin <yaowenbin1@huawei.com>,
        Wenyu Liu <liuwenyu7@huawei.com>,
        Song Liu <songliubraving@fb.com>,
        Andrii Nakryiko <andrii@kernel.org>,
        Dave Marchevsky <davemarchevsky@fb.com>,
        Leo Yan <leo.yan@linaro.org>,
        Kim Phillips <kim.phillips@amd.com>,
        Pavithra Gurushankar <gpavithrasha@gmail.com>,
        Alexandre Truong <alexandre.truong@arm.com>,
        Quentin Monnet <quentin@isovalent.com>,
        William Cohen <wcohen@redhat.com>,
        Andres Freund <andres@anarazel.de>,
        =?UTF-8?Q?Martin_Li=c5=a1ka?= <mliska@suse.cz>,
        Colin Ian King <colin.king@intel.com>,
        James Clark <james.clark@arm.com>,
        Fangrui Song <maskray@google.com>,
        Stephane Eranian <eranian@google.com>,
        Kajol Jain <kjain@linux.ibm.com>,
        Alexey Bayduraev <alexey.v.bayduraev@linux.intel.com>,
        Riccardo Mancini <rickyman7@gmail.com>,
        Andi Kleen <ak@linux.intel.com>,
        Masami Hiramatsu <mhiramat@kernel.org>,
        Zechuan Chen <chenzechuan1@huawei.com>,
        Jason Wang <wangborong@cdjrlc.com>,
        Christophe JAILLET <christophe.jaillet@wanadoo.fr>,
        Remi Bernon <rbernon@codeweavers.com>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        linux-perf-users <linux-perf-users@vger.kernel.org>,
        bpf <bpf@vger.kernel.org>, llvm@lists.linux.dev
References: <20220824153901.488576-1-irogers@google.com>
 <CA+JHD906M0truH7wPNZ=eJwdCA=qLhYDonUx_ZQBwJYpiX1hNg@mail.gmail.com>
From:   Adrian Hunter <adrian.hunter@intel.com>
Organization: Intel Finland Oy, Registered Address: PL 281, 00181 Helsinki,
 Business Identity Code: 0357606 - 4, Domiciled in Helsinki
In-Reply-To: <CA+JHD906M0truH7wPNZ=eJwdCA=qLhYDonUx_ZQBwJYpiX1hNg@mail.gmail.com>
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Precedence: bulk

On 25/08/22 15:30, Arnaldo Carvalho de Melo wrote:
> On Wed, Aug 24, 2022, 12:39 PM Ian Rogers <irogers@google.com <mailto:irogers@google.com>> wrote:
> 
>     When fixing a locking race and memory leak in:
>     https://lore.kernel.org/linux-perf-users/20211118193714.2293728-1-irogers@google.com/ <https://lore.kernel.org/linux-perf-users/20211118193714.2293728-1-irogers@google.com/>
> 
>     It was requested that debug mutex code be separated out into its own
>     files. This was, in part, done by Pavithra Gurushankar in:
>     https://lore.kernel.org/lkml/20220727111954.105118-1-gpavithrasha@gmail.com/ <https://lore.kernel.org/lkml/20220727111954.105118-1-gpavithrasha@gmail.com/>
> 
>     These patches fix issues with the previous patches, add in the
>     original dso->nsinfo fix and then build on our mutex wrapper with
>     clang's -Wthread-safety analysis. The analysis found missing unlocks
>     in builtin-sched.c which are fixed and -Wthread-safety is enabled by
>     default when building with clang.
> 
>     v3. Adds a missing new line to the error messages and removes the
>         pshared argument to mutex_init by having two functions, mutex_init
>         and mutex_init_pshared. These changes were suggested by Adrian Hunter.
> 
> 
> Adrian, can I have your Acked-by or, better, Reviewed-by?

Sure, just let me have another look.  Should get to it
tomorrow.

> 
> Thanks, 
> 
> -  Arnaldo 
> 
>     v2. Breaks apart changes that s/pthread_mutex/mutex/g and the lock
>         annotations as requested by Arnaldo and Namhyung. A boolean is
>         added to builtin-sched.c to terminate thread funcs rather than
>         leaving them blocked on delted mutexes.
> 
>     Ian Rogers (17):
>       perf bench: Update use of pthread mutex/cond
>       perf tests: Avoid pthread.h inclusion
>       perf hist: Update use of pthread mutex
>       perf bpf: Remove unused pthread.h include
>       perf lock: Remove unused pthread.h include
>       perf record: Update use of pthread mutex
>       perf sched: Update use of pthread mutex
>       perf ui: Update use of pthread mutex
>       perf mmap: Remove unnecessary pthread.h include
>       perf dso: Update use of pthread mutex
>       perf annotate: Update use of pthread mutex
>       perf top: Update use of pthread mutex
>       perf dso: Hold lock when accessing nsinfo
>       perf mutex: Add thread safety annotations
>       perf sched: Fixes for thread safety analysis
>       perf top: Fixes for thread safety analysis
>       perf build: Enable -Wthread-safety with clang
> 
>     Pavithra Gurushankar (1):
>       perf mutex: Wrapped usage of mutex and cond
> 
>      tools/perf/Makefile.config                 |   5 +
>      tools/perf/bench/epoll-ctl.c               |  33 +++---
>      tools/perf/bench/epoll-wait.c              |  33 +++---
>      tools/perf/bench/futex-hash.c              |  33 +++---
>      tools/perf/bench/futex-lock-pi.c           |  33 +++---
>      tools/perf/bench/futex-requeue.c           |  33 +++---
>      tools/perf/bench/futex-wake-parallel.c     |  33 +++---
>      tools/perf/bench/futex-wake.c              |  33 +++---
>      tools/perf/bench/numa.c                    |  93 ++++++----------
>      tools/perf/builtin-inject.c                |   4 +
>      tools/perf/builtin-lock.c                  |   1 -
>      tools/perf/builtin-record.c                |  13 ++-
>      tools/perf/builtin-sched.c                 | 105 +++++++++---------
>      tools/perf/builtin-top.c                   |  45 ++++----
>      tools/perf/tests/mmap-basic.c              |   2 -
>      tools/perf/tests/openat-syscall-all-cpus.c |   2 +-
>      tools/perf/tests/perf-record.c             |   2 -
>      tools/perf/ui/browser.c                    |  20 ++--
>      tools/perf/ui/browsers/annotate.c          |  12 +--
>      tools/perf/ui/setup.c                      |   5 +-
>      tools/perf/ui/tui/helpline.c               |   5 +-
>      tools/perf/ui/tui/progress.c               |   8 +-
>      tools/perf/ui/tui/setup.c                  |   8 +-
>      tools/perf/ui/tui/util.c                   |  18 ++--
>      tools/perf/ui/ui.h                         |   4 +-
>      tools/perf/util/Build                      |   1 +
>      tools/perf/util/annotate.c                 |  15 +--
>      tools/perf/util/annotate.h                 |   4 +-
>      tools/perf/util/bpf-event.h                |   1 -
>      tools/perf/util/build-id.c                 |  12 ++-
>      tools/perf/util/dso.c                      |  19 ++--
>      tools/perf/util/dso.h                      |   4 +-
>      tools/perf/util/hist.c                     |   6 +-
>      tools/perf/util/hist.h                     |   4 +-
>      tools/perf/util/map.c                      |   3 +
>      tools/perf/util/mmap.h                     |   1 -
>      tools/perf/util/mutex.c                    | 119 +++++++++++++++++++++
>      tools/perf/util/mutex.h                    | 109 +++++++++++++++++++
>      tools/perf/util/probe-event.c              |   3 +
>      tools/perf/util/symbol.c                   |   4 +-
>      tools/perf/util/top.h                      |   5 +-
>      41 files changed, 570 insertions(+), 323 deletions(-)
>      create mode 100644 tools/perf/util/mutex.c
>      create mode 100644 tools/perf/util/mutex.h
> 
>     -- 
>     2.37.2.609.g9ff673ca1a-goog
>