|
 |
df3f53 |
From f575b6e0857087f46d54f494d9a435af715ea19d Mon Sep 17 00:00:00 2001
|
|
|
df3f53 |
From: Karel Zak <kzak@redhat.com>
|
|
|
df3f53 |
Date: Thu, 1 Oct 2020 10:40:27 +0200
|
|
|
df3f53 |
Subject: [PATCH 43/55] chrt: use SCHED_FLAG_RESET_ON_FORK for sched_setattr()
|
|
|
df3f53 |
|
|
|
df3f53 |
Reviewed by many people, used for years (but probably nobody uses
|
|
|
df3f53 |
SCHED_DEADLINE with reset-on-fork), but we all missed:
|
|
|
df3f53 |
|
|
|
df3f53 |
- sched_setscheduler() uses SCHED_RESET_ON_FORK (0x40000000)
|
|
|
df3f53 |
- sched_setattr() uses SCHED_FLAG_RESET_ON_FORK (0x01)
|
|
|
df3f53 |
|
|
|
df3f53 |
Addresses: https://bugzilla.redhat.com/show_bug.cgi?id=1884194
|
|
|
df3f53 |
Signed-off-by: Karel Zak <kzak@redhat.com>
|
|
|
df3f53 |
---
|
|
|
df3f53 |
schedutils/chrt.c | 7 ++++---
|
|
|
df3f53 |
1 file changed, 4 insertions(+), 3 deletions(-)
|
|
|
df3f53 |
|
|
|
df3f53 |
diff --git a/schedutils/chrt.c b/schedutils/chrt.c
|
|
|
df3f53 |
index b08c78ed8..15556bbad 100644
|
|
|
df3f53 |
--- a/schedutils/chrt.c
|
|
|
df3f53 |
+++ b/schedutils/chrt.c
|
|
|
df3f53 |
@@ -123,7 +123,7 @@ struct chrt_ctl {
|
|
|
df3f53 |
uint64_t period;
|
|
|
df3f53 |
|
|
|
df3f53 |
unsigned int all_tasks : 1, /* all threads of the PID */
|
|
|
df3f53 |
- reset_on_fork : 1, /* SCHED_RESET_ON_FORK */
|
|
|
df3f53 |
+ reset_on_fork : 1, /* SCHED_RESET_ON_FORK or SCHED_FLAG_RESET_ON_FORK */
|
|
|
df3f53 |
altered : 1, /* sched_set**() used */
|
|
|
df3f53 |
verbose : 1; /* verbose output */
|
|
|
df3f53 |
};
|
|
|
df3f53 |
@@ -376,9 +376,10 @@ static int set_sched_one(struct chrt_ctl *ctl, pid_t pid)
|
|
|
df3f53 |
sa.sched_period = ctl->period;
|
|
|
df3f53 |
sa.sched_deadline = ctl->deadline;
|
|
|
df3f53 |
|
|
|
df3f53 |
-# ifdef SCHED_RESET_ON_FORK
|
|
|
df3f53 |
+# ifdef SCHED_FLAG_RESET_ON_FORK
|
|
|
df3f53 |
+ /* Don't use SCHED_RESET_ON_FORK for sched_setattr()! */
|
|
|
df3f53 |
if (ctl->reset_on_fork)
|
|
|
df3f53 |
- sa.sched_flags |= SCHED_RESET_ON_FORK;
|
|
|
df3f53 |
+ sa.sched_flags |= SCHED_FLAG_RESET_ON_FORK;
|
|
|
df3f53 |
# endif
|
|
|
df3f53 |
errno = 0;
|
|
|
df3f53 |
return sched_setattr(pid, &sa, 0);
|
|
|
df3f53 |
--
|
|
|
df3f53 |
2.29.2
|
|
|
df3f53 |
|