Message-ID: <YwkdIBsQEKXG3/rE@kernel.org>
Date:   Fri, 26 Aug 2022 16:21:04 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Namhyung Kim <namhyung@...nel.org>
Cc:     Ian Rogers <irogers@...gle.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
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Subject: Re: [PATCH v4 00/18] Mutex wrapper, locking and memory leak fixes

Em Fri, Aug 26, 2022 at 12:08:06PM -0700, Namhyung Kim escreveu:
> On Fri, Aug 26, 2022 at 9:42 AM Ian Rogers <irogers@...gle.com> wrote:
> >
> > When fixing a locking race and memory leak in:
> > 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/
> >
> > 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.
> >
> > v4. Adds a comment for the trylock result, fixes the new line (missed
> >     in v3) and removes two blank lines as suggested by Adrian Hunter.
> > 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.
> > 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
> 
> For the patches 1-7 and 10-13
> 
> Acked-by: Namhyung Kim <namhyung@...nel.org>

Thanks added it, will try to get what is done so far merged and then we
can go on addressing the other issues brought up in this thread.

- Arnaldo

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