On Mon, May 10, 2021 at 02:05:13PM +0200, Peter Zijlstra wrote:
>
> Just like sched_schedstats, allow runtime enabling (and disabling) of
> delayacct. This is useful if one forgot to add the delayacct boot time
> option.
>
> Signed-off-by: Peter Zijlstra (Intel) <[email protected]>
> ---
> Documentation/accounting/delay-accounting.rst | 6 ++--
> kernel/delayacct.c | 36 ++++++++++++++++++++++++--
> kernel/sysctl.c | 12 ++++++++
> 3 files changed, 50 insertions(+), 4 deletions(-)
*sigh*, the below hunk went missing..
--- a/include/linux/delayacct.h
+++ b/include/linux/delayacct.h
@@ -65,6 +65,10 @@ DECLARE_STATIC_KEY_FALSE(delayacct_key);
extern int delayacct_on; /* Delay accounting turned on/off */
extern struct kmem_cache *delayacct_cache;
extern void delayacct_init(void);
+
+extern int sysctl_delayacct(struct ctl_table *table, int write, void *buffer,
+ size_t *lenp, loff_t *ppos);
+
extern void __delayacct_tsk_init(struct task_struct *);
extern void __delayacct_tsk_exit(struct task_struct *);
extern void __delayacct_blkio_start(void);