From 1011dcce99f8026d48fdd7b9cc259e32a8b472be Mon Sep 17 00:00:00 2001 From: Peter Zijlstra Date: Thu, 25 Mar 2021 12:21:38 +0100 Subject: sched,preempt: Move preempt_dynamic to debug.c Move the #ifdef SCHED_DEBUG bits to kernel/sched/debug.c in order to collect all the debugfs bits. Signed-off-by: Peter Zijlstra (Intel) Tested-by: Valentin Schneider Link: https://lkml.kernel.org/r/20210412102001.353833279@infradead.org --- kernel/sched/debug.c | 67 +++++++++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 66 insertions(+), 1 deletion(-) (limited to 'kernel/sched/debug.c') diff --git a/kernel/sched/debug.c b/kernel/sched/debug.c index 2093b9086e34..bdd344f92c41 100644 --- a/kernel/sched/debug.c +++ b/kernel/sched/debug.c @@ -213,9 +213,71 @@ static const struct file_operations sched_scaling_fops = { #endif /* SMP */ +#ifdef CONFIG_PREEMPT_DYNAMIC + +static ssize_t sched_dynamic_write(struct file *filp, const char __user *ubuf, + size_t cnt, loff_t *ppos) +{ + char buf[16]; + int mode; + + if (cnt > 15) + cnt = 15; + + if (copy_from_user(&buf, ubuf, cnt)) + return -EFAULT; + + buf[cnt] = 0; + mode = sched_dynamic_mode(strstrip(buf)); + if (mode < 0) + return mode; + + sched_dynamic_update(mode); + + *ppos += cnt; + + return cnt; +} + +static int sched_dynamic_show(struct seq_file *m, void *v) +{ + static const char * preempt_modes[] = { + "none", "voluntary", "full" + }; + int i; + + for (i = 0; i < ARRAY_SIZE(preempt_modes); i++) { + if (preempt_dynamic_mode == i) + seq_puts(m, "("); + seq_puts(m, preempt_modes[i]); + if (preempt_dynamic_mode == i) + seq_puts(m, ")"); + + seq_puts(m, " "); + } + + seq_puts(m, "\n"); + return 0; +} + +static int sched_dynamic_open(struct inode *inode, struct file *filp) +{ + return single_open(filp, sched_dynamic_show, NULL); +} + +static const struct file_operations sched_dynamic_fops = { + .open = sched_dynamic_open, + .write = sched_dynamic_write, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + +#endif /* CONFIG_PREEMPT_DYNAMIC */ + __read_mostly bool sched_debug_enabled; -struct dentry *debugfs_sched; +static struct dentry *debugfs_sched; static __init int sched_init_debug(void) { @@ -225,6 +287,9 @@ static __init int sched_init_debug(void) debugfs_create_file("features", 0644, debugfs_sched, NULL, &sched_feat_fops); debugfs_create_bool("debug_enabled", 0644, debugfs_sched, &sched_debug_enabled); +#ifdef CONFIG_PREEMPT_DYNAMIC + debugfs_create_file("preempt", 0644, debugfs_sched, NULL, &sched_dynamic_fops); +#endif debugfs_create_u32("latency_ns", 0644, debugfs_sched, &sysctl_sched_latency); debugfs_create_u32("min_granularity_ns", 0644, debugfs_sched, &sysctl_sched_min_granularity); -- cgit v1.2.3-59-g8ed1b