From: Adrian Knoth <adi@drcomp.erfurt.thur.de>
Date: Tue, 2 Feb 2010 16:18:29 +0000 (+0100)
Subject: chrt: add support for SCHED_RESET_ON_FORK
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0fefbedc72f5b8399be50ae0aad8eb9cb3b630a3;p=util-linux

chrt: add support for SCHED_RESET_ON_FORK

From 9262c9832134f8a33ac2ea2854dc6d20acc712d1 Mon Sep 17 00:00:00 2001
From: Adrian Knoth <adi@drcomp.erfurt.thur.de>
Date: Tue, 2 Feb 2010 16:57:23 +0100
Subject: [PATCH] Add support for SCHED_RESET_ON_FORK to chrt

SCHED_RESET_ON_FORK has been added in 2.6.31. If a thread has this flag
set, chrt reports "unknown" policy, which is confusing.

The patch adds support for this new flag. It will (can) only be applied
to SCHED_FIFO or SCHED_RR, so there's no need to catch the other
scheduling policies.

Signed-off-by: Adrian Knoth <adi@drcomp.erfurt.thur.de>
---

diff --git a/schedutils/chrt.c b/schedutils/chrt.c
index 6953addd..6629c2e8 100644
--- a/schedutils/chrt.c
+++ b/schedutils/chrt.c
@@ -47,6 +47,11 @@
 # define SCHED_IDLE 5
 #endif
 
+#if defined(__linux__) && !defined(SCHED_RESET_ON_FORK)
+#define SCHED_RESET_ON_FORK 0x40000000
+#endif
+
+
 static void show_usage(int rc)
 {
 	fprintf(stdout, _(
@@ -92,6 +97,9 @@ static void show_rt_info(const char *what, pid_t pid)
 	case SCHED_FIFO:
 		printf("SCHED_FIFO\n");
 		break;
+	case SCHED_FIFO|SCHED_RESET_ON_FORK:
+		printf("SCHED_FIFO|SCHED_RESET_ON_FORK\n");
+		break;
 #ifdef SCHED_IDLE
 	case SCHED_IDLE:
 		printf("SCHED_IDLE\n");
@@ -100,6 +108,9 @@ static void show_rt_info(const char *what, pid_t pid)
 	case SCHED_RR:
 		printf("SCHED_RR\n");
 		break;
+	case SCHED_RR|SCHED_RESET_ON_FORK:
+		printf("SCHED_RR|SCHED_RESET_ON_FORK\n");
+		break;
 #ifdef SCHED_BATCH
 	case SCHED_BATCH:
 		printf("SCHED_BATCH\n");