From: Ingo Molnar <mingo@kernel.org>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: linux-kernel@vger.kernel.org,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
Thomas Gleixner <tglx@linutronix.de>,
Andrew Morton <akpm@linux-foundation.org>,
Arnaldo Carvalho de Melo <acme@infradead.org>
Subject: [GIT PULL] perf fix
Date: Sun, 11 Oct 2020 10:00:15 +0200 [thread overview]
Message-ID: <20201011080015.GA3530982@gmail.com> (raw)
Linus,
Please pull the latest perf/urgent git tree from:
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git perf-urgent-2020-10-11
# HEAD: 6d6b8b9f4fceab7266ca03d194f60ec72bd4b654 perf: Fix task_function_call() error handling
Fix an error handling bug that can cause a lockup if a CPU is offline. (doh ...)
Thanks,
Ingo
------------------>
Kajol Jain (1):
perf: Fix task_function_call() error handling
kernel/events/core.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/kernel/events/core.c b/kernel/events/core.c
index 7ed5248f0445..e8bf92202542 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -99,7 +99,7 @@ static void remote_function(void *data)
* retry due to any failures in smp_call_function_single(), such as if the
* task_cpu() goes offline concurrently.
*
- * returns @func return value or -ESRCH when the process isn't running
+ * returns @func return value or -ESRCH or -ENXIO when the process isn't running
*/
static int
task_function_call(struct task_struct *p, remote_function_f func, void *info)
@@ -115,7 +115,8 @@ task_function_call(struct task_struct *p, remote_function_f func, void *info)
for (;;) {
ret = smp_call_function_single(task_cpu(p), remote_function,
&data, 1);
- ret = !ret ? data.ret : -EAGAIN;
+ if (!ret)
+ ret = data.ret;
if (ret != -EAGAIN)
break;
next reply other threads:[~2020-10-11 8:00 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-11 8:00 Ingo Molnar [this message]
2020-10-11 18:23 ` [GIT PULL] perf fix pr-tracker-bot
-- strict thread matches above, loose matches on Subject: below --
2024-04-07 7:55 Ingo Molnar
2024-04-07 16:44 ` pr-tracker-bot
2021-06-24 7:01 Ingo Molnar
2021-06-24 16:34 ` pr-tracker-bot
2020-06-28 18:33 Ingo Molnar
2020-06-28 22:05 ` pr-tracker-bot
2019-09-12 8:39 Ingo Molnar
2019-09-12 10:15 ` pr-tracker-bot
2019-04-27 14:38 Ingo Molnar
2019-04-27 18:45 ` pr-tracker-bot
2018-01-17 15:27 Ingo Molnar
2017-10-27 19:14 Ingo Molnar
2017-08-26 7:12 Ingo Molnar
2016-07-13 12:49 Ingo Molnar
2016-05-10 11:43 Ingo Molnar
2016-04-23 11:24 Ingo Molnar
2015-03-28 10:24 Ingo Molnar
2013-12-17 13:35 Ingo Molnar
2013-09-28 18:03 [GIT PULL] perf fixes Ingo Molnar
2013-09-29 11:47 ` Markus Trippelsdorf
2013-09-29 14:26 ` [GIT PULL] perf fix Ingo Molnar
2013-09-03 13:37 Ingo Molnar
2013-06-27 13:11 Ingo Molnar
2013-04-27 7:50 Ingo Molnar
2012-05-23 18:50 Ingo Molnar
2012-05-23 18:56 ` Josh Boyer
2012-05-23 18:57 ` Josh Boyer
2012-05-23 20:04 ` Ingo Molnar
2012-05-23 20:10 ` Josh Boyer
2012-05-23 20:20 ` Ingo Molnar
2012-03-03 7:50 Ingo Molnar
2011-12-17 20:53 Ingo Molnar
2011-10-01 7:52 Ingo Molnar
2011-07-23 8:57 Ingo Molnar
2010-05-15 6:00 Ingo Molnar
2010-05-04 17:52 Ingo Molnar
2010-04-20 7:32 Ingo Molnar
2010-04-08 13:52 [PATCH] perf: Fix unsafe frame rewinding with hot regs fetching Eric Dumazet
2010-04-08 17:31 ` [GIT PULL] perf fix Frederic Weisbecker
2010-04-13 22:51 ` Ingo Molnar
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