43d09e79d
Denys Vlasenko
2019-04-05
Subject
chrt: fix for SCHED_RESET_ON_FORK bit
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util-linux/chrt.c+11 -0
| @@ -135,6 +135,17 @@ int chrt_main(int argc UNUSED_PARAM, char **argv) | |
| pol = sched_getscheduler(pid); | |
| if (pol < 0) | |
| bb_perror_msg_and_die("can't %cet pid %u's policy", 'g', (int)pid); | |
| + | #ifdef SCHED_RESET_ON_FORK |
| + | /* "Since Linux 2.6.32, the SCHED_RESET_ON_FORK flag |
| + | * can be ORed in policy when calling sched_setscheduler(). |
| + | * As a result of including this flag, children created by |
| + | * fork(2) do not inherit privileged scheduling policies" |
| + | * |
| + | * This bit is also returned by sched_getscheduler()! |
| + | * (TODO: do we want to show it?) |
| + | */ |
| + | pol &= ~SCHED_RESET_ON_FORK; |
| + | #endif |
| printf("pid %u's %s scheduling policy: SCHED_%s\n", | |
| pid, current_new, policy_name(pol) | |
| ); | |