From: Marco Elver <elver@google.com>
To: elver@google.com, peterz@infradead.org,
alexander.shishkin@linux.intel.com, acme@kernel.org,
mingo@redhat.com, jolsa@redhat.com, mark.rutland@arm.com,
namhyung@kernel.org, tglx@linutronix.de
Cc: glider@google.com, viro@zeniv.linux.org.uk, arnd@arndb.de,
christian@brauner.io, dvyukov@google.com, jannh@google.com,
axboe@kernel.dk, mascasa@google.com, pcc@google.com,
irogers@google.com, oleg@redhat.com, kasan-dev@googlegroups.com,
linux-arch@vger.kernel.org, linux-fsdevel@vger.kernel.org,
linux-kernel@vger.kernel.org, x86@kernel.org,
linux-kselftest@vger.kernel.org
Subject: [PATCH v4 02/10] perf: Apply PERF_EVENT_IOC_MODIFY_ATTRIBUTES to children
Date: Thu, 8 Apr 2021 12:35:57 +0200 [thread overview]
Message-ID: <20210408103605.1676875-3-elver@google.com> (raw)
In-Reply-To: <20210408103605.1676875-1-elver@google.com>
As with other ioctls (such as PERF_EVENT_IOC_{ENABLE,DISABLE}), fix up
handling of PERF_EVENT_IOC_MODIFY_ATTRIBUTES to also apply to children.
Suggested-by: Dmitry Vyukov <dvyukov@google.com>
Reviewed-by: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Marco Elver <elver@google.com>
---
kernel/events/core.c | 22 +++++++++++++++++++++-
1 file changed, 21 insertions(+), 1 deletion(-)
diff --git a/kernel/events/core.c b/kernel/events/core.c
index e77294c7e654..a9a0a46909af 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -3199,16 +3199,36 @@ static int perf_event_modify_breakpoint(struct perf_event *bp,
static int perf_event_modify_attr(struct perf_event *event,
struct perf_event_attr *attr)
{
+ int (*func)(struct perf_event *, struct perf_event_attr *);
+ struct perf_event *child;
+ int err;
+
if (event->attr.type != attr->type)
return -EINVAL;
switch (event->attr.type) {
case PERF_TYPE_BREAKPOINT:
- return perf_event_modify_breakpoint(event, attr);
+ func = perf_event_modify_breakpoint;
+ break;
default:
/* Place holder for future additions. */
return -EOPNOTSUPP;
}
+
+ WARN_ON_ONCE(event->ctx->parent_ctx);
+
+ mutex_lock(&event->child_mutex);
+ err = func(event, attr);
+ if (err)
+ goto out;
+ list_for_each_entry(child, &event->child_list, child_list) {
+ err = func(child, attr);
+ if (err)
+ goto out;
+ }
+out:
+ mutex_unlock(&event->child_mutex);
+ return err;
}
static void ctx_sched_out(struct perf_event_context *ctx,
--
2.31.0.208.g409f899ff0-goog
next prev parent reply other threads:[~2021-04-08 10:37 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-08 10:35 [PATCH v4 00/10] Add support for synchronous signals on perf events Marco Elver
2021-04-08 10:35 ` [PATCH v4 01/10] perf: Rework perf_event_exit_event() Marco Elver
2021-04-16 15:01 ` [tip: perf/core] " tip-bot2 for Peter Zijlstra
2021-04-08 10:35 ` Marco Elver [this message]
2021-04-16 15:01 ` [tip: perf/core] perf: Apply PERF_EVENT_IOC_MODIFY_ATTRIBUTES to children tip-bot2 for Marco Elver
2021-04-08 10:35 ` [PATCH v4 03/10] perf: Support only inheriting events if cloned with CLONE_THREAD Marco Elver
2021-04-08 10:35 ` [PATCH v4 04/10] perf: Add support for event removal on exec Marco Elver
2021-04-16 15:01 ` [tip: perf/core] " tip-bot2 for Marco Elver
2021-04-08 10:36 ` [PATCH v4 05/10] signal: Introduce TRAP_PERF si_code and si_perf to siginfo Marco Elver
2021-04-16 15:01 ` [tip: perf/core] " tip-bot2 for Marco Elver
[not found] ` <CGME20210420212618eucas1p102b427d1af9c682217dfe093f3eac3e8@eucas1p1.samsung.com>
2021-04-20 21:26 ` [PATCH v4 05/10] " Marek Szyprowski
2021-04-20 22:42 ` Marco Elver
2021-04-21 6:21 ` Marek Szyprowski
2021-04-21 7:35 ` Marek Szyprowski
2021-04-21 8:11 ` Marco Elver
2021-04-21 9:35 ` Marek Szyprowski
2021-04-21 10:57 ` Marek Szyprowski
2021-04-21 11:03 ` Marco Elver
2021-04-21 13:19 ` Marek Szyprowski
2021-04-21 15:11 ` Marco Elver
2021-04-21 16:27 ` Marco Elver
2021-04-21 18:23 ` Marco Elver
2021-04-22 6:12 ` Marek Szyprowski
2021-04-22 6:47 ` Marco Elver
2021-04-22 8:16 ` Jon Hunter
2021-04-26 7:35 ` Alexander Egorenkov
2021-04-21 15:07 ` Jon Hunter
2021-04-08 10:36 ` [PATCH v4 06/10] perf: Add support for SIGTRAP on perf events Marco Elver
2021-04-08 10:36 ` [PATCH v4 07/10] selftests/perf_events: Add kselftest for process-wide sigtrap handling Marco Elver
2021-04-16 15:01 ` [tip: perf/core] " tip-bot2 for Marco Elver
2021-04-08 10:36 ` [PATCH v4 08/10] selftests/perf_events: Add kselftest for remove_on_exec Marco Elver
2021-04-16 15:01 ` [tip: perf/core] " tip-bot2 for Marco Elver
2021-04-08 10:36 ` [PATCH v4 09/10] tools headers uapi: Sync tools/include/uapi/linux/perf_event.h Marco Elver
2021-04-08 10:36 ` [PATCH v4 10/10] perf test: Add basic stress test for sigtrap handling Marco Elver
2021-04-14 8:37 ` [PATCH v4 00/10] Add support for synchronous signals on perf events Peter Zijlstra
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