summaryrefslogtreecommitdiff
path: root/kernel/delayacct.c
diff options
context:
space:
mode:
authorPeter Zijlstra <peterz@infradead.org>2021-05-04 22:43:42 +0200
committerPeter Zijlstra <peterz@infradead.org>2021-05-12 11:43:24 +0200
commitc5895d3f06cbb80ccb311f1dcb37074651030cb6 (patch)
tree08635c51d53ed97b16fa29b7f0bd5ad66bc1b687 /kernel/delayacct.c
parent4e29fb709885eda5f0d1fa3418e6ead01a64e46d (diff)
sched: Simplify sched_info_on()
The situation around sched_info is somewhat complicated, it is used by sched_stats and delayacct and, indirectly, kvm. If SCHEDSTATS=Y (but disabled by default) sched_info_on() is unconditionally true -- this is the case for all distro kernel configs I checked. If for some reason SCHEDSTATS=N, but TASK_DELAY_ACCT=Y, then sched_info_on() can return false when delayacct is disabled, presumably because there would be no other users left; except kvm is. Instead of complicating matters further by accurately accounting sched_stat and kvm state, simply unconditionally enable when SCHED_INFO=Y, matching the common distro case. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Ingo Molnar <mingo@kernel.org> Acked-by: Johannes Weiner <hannes@cmpxchg.org> Link: https://lkml.kernel.org/r/20210505111525.121458839@infradead.org
Diffstat (limited to 'kernel/delayacct.c')
-rw-r--r--kernel/delayacct.c1
1 files changed, 0 insertions, 1 deletions
diff --git a/kernel/delayacct.c b/kernel/delayacct.c
index 3fe7cd52b459..3a0b910386d1 100644
--- a/kernel/delayacct.c
+++ b/kernel/delayacct.c
@@ -15,7 +15,6 @@
#include <linux/module.h>
int delayacct_on __read_mostly = 1; /* Delay accounting turned on/off */
-EXPORT_SYMBOL_GPL(delayacct_on);
struct kmem_cache *delayacct_cache;
static int __init delayacct_setup_disable(char *str)