diff options
author | Ian Rogers <irogers@google.com> | 2023-10-25 01:23:04 +0300 |
---|---|---|
committer | Namhyung Kim <namhyung@kernel.org> | 2023-10-25 23:35:35 +0300 |
commit | 7a8f349e9d14da1633e021c2fe87234b21ab181d (patch) | |
tree | adad00c733ee12ddcd018d53ab520a768810b428 /tools/perf/util/rwsem.h | |
parent | b27778ed5d1d21cdb4fa83ff5185e7e438fd653f (diff) | |
download | linux-7a8f349e9d14da1633e021c2fe87234b21ab181d.tar.xz |
perf rwsem: Add debug mode that uses a mutex
Mutex error check will capture trying to take the lock recursively and
other problems that rwlock won't. At the expense of concurrency, adda
debug mode that uses a mutex in place of a rwsem.
Signed-off-by: Ian Rogers <irogers@google.com>
Cc: K Prateek Nayak <kprateek.nayak@amd.com>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Sandipan Das <sandipan.das@amd.com>
Cc: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: German Gomez <german.gomez@arm.com>
Cc: James Clark <james.clark@arm.com>
Cc: Nick Terrell <terrelln@fb.com>
Cc: Sean Christopherson <seanjc@google.com>
Cc: Changbin Du <changbin.du@huawei.com>
Cc: liuwenyu <liuwenyu7@huawei.com>
Cc: Yang Jihong <yangjihong1@huawei.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Miguel Ojeda <ojeda@kernel.org>
Cc: Song Liu <song@kernel.org>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Cc: Yanteng Si <siyanteng@loongson.cn>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Link: https://lore.kernel.org/r/20231024222353.3024098-2-irogers@google.com
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Diffstat (limited to 'tools/perf/util/rwsem.h')
-rw-r--r-- | tools/perf/util/rwsem.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/tools/perf/util/rwsem.h b/tools/perf/util/rwsem.h index 94565ad4d494..ef5cbc31d967 100644 --- a/tools/perf/util/rwsem.h +++ b/tools/perf/util/rwsem.h @@ -2,9 +2,20 @@ #define _PERF_RWSEM_H #include <pthread.h> +#include "mutex.h" + +/* + * Mutexes have additional error checking. Enable to use a mutex rather than a + * rwlock for debugging. + */ +#define RWS_ERRORCHECK 0 struct rw_semaphore { +#if RWS_ERRORCHECK + struct mutex mtx; +#else pthread_rwlock_t lock; +#endif }; int init_rwsem(struct rw_semaphore *sem); |