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| author | Peter Zijlstra <peterz@infradead.org> | 2021-05-04 22:43:42 +0200 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2021-05-12 11:43:24 +0200 |
| commit | c5895d3f06cbb80ccb311f1dcb37074651030cb6 (patch) | |
| tree | 08635c51d53ed97b16fa29b7f0bd5ad66bc1b687 /kernel/delayacct.c | |
| parent | 4e29fb709885eda5f0d1fa3418e6ead01a64e46d (diff) | |
| download | linux-c5895d3f06cbb80ccb311f1dcb37074651030cb6.tar.gz linux-c5895d3f06cbb80ccb311f1dcb37074651030cb6.tar.bz2 linux-c5895d3f06cbb80ccb311f1dcb37074651030cb6.zip | |
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.c | 1 |
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) |