mirror of https://gitee.com/openkylin/linux.git
sched/debug: Move the /sys/kernel/debug/sched_features file setup into debug.c
As /sys/kernel/debug/sched_features is only created when SCHED_DEBUG is enabled, and the file debug.c is only compiled when SCHED_DEBUG is enabled, it makes sense to move sched_feature setup into that file and get rid of the #ifdef. Signed-off-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Clark Williams <williams@redhat.com> Cc: Juri Lelli <juri.lelli@gmail.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20160222212825.464193063@goodmis.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Steven Rostedt (Red Hat)
Ingo Molnar
parent
ff77e46853
commit
d6ca41d792
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@ -66,7 +66,6 @@
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#include <linux/pagemap.h>
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#include <linux/hrtimer.h>
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#include <linux/tick.h>
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#include <linux/debugfs.h>
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#include <linux/ctype.h>
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#include <linux/ftrace.h>
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#include <linux/slab.h>
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@ -124,138 +123,6 @@ const_debug unsigned int sysctl_sched_features =
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#undef SCHED_FEAT
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#ifdef CONFIG_SCHED_DEBUG
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#define SCHED_FEAT(name, enabled) \
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#name ,
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static const char * const sched_feat_names[] = {
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#include "features.h"
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};
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#undef SCHED_FEAT
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static int sched_feat_show(struct seq_file *m, void *v)
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{
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int i;
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for (i = 0; i < __SCHED_FEAT_NR; i++) {
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if (!(sysctl_sched_features & (1UL << i)))
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seq_puts(m, "NO_");
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seq_printf(m, "%s ", sched_feat_names[i]);
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}
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seq_puts(m, "\n");
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return 0;
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}
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#ifdef HAVE_JUMP_LABEL
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#define jump_label_key__true STATIC_KEY_INIT_TRUE
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#define jump_label_key__false STATIC_KEY_INIT_FALSE
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#define SCHED_FEAT(name, enabled) \
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jump_label_key__##enabled ,
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struct static_key sched_feat_keys[__SCHED_FEAT_NR] = {
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#include "features.h"
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};
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#undef SCHED_FEAT
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static void sched_feat_disable(int i)
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{
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static_key_disable(&sched_feat_keys[i]);
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}
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static void sched_feat_enable(int i)
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{
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static_key_enable(&sched_feat_keys[i]);
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}
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#else
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static void sched_feat_disable(int i) { };
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static void sched_feat_enable(int i) { };
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#endif /* HAVE_JUMP_LABEL */
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static int sched_feat_set(char *cmp)
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{
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int i;
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int neg = 0;
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if (strncmp(cmp, "NO_", 3) == 0) {
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neg = 1;
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cmp += 3;
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}
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for (i = 0; i < __SCHED_FEAT_NR; i++) {
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if (strcmp(cmp, sched_feat_names[i]) == 0) {
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if (neg) {
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sysctl_sched_features &= ~(1UL << i);
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sched_feat_disable(i);
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} else {
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sysctl_sched_features |= (1UL << i);
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sched_feat_enable(i);
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}
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break;
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}
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}
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return i;
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}
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static ssize_t
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sched_feat_write(struct file *filp, const char __user *ubuf,
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size_t cnt, loff_t *ppos)
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{
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char buf[64];
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char *cmp;
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int i;
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struct inode *inode;
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if (cnt > 63)
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cnt = 63;
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if (copy_from_user(&buf, ubuf, cnt))
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return -EFAULT;
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buf[cnt] = 0;
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cmp = strstrip(buf);
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/* Ensure the static_key remains in a consistent state */
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inode = file_inode(filp);
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inode_lock(inode);
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i = sched_feat_set(cmp);
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inode_unlock(inode);
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if (i == __SCHED_FEAT_NR)
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return -EINVAL;
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*ppos += cnt;
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return cnt;
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}
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static int sched_feat_open(struct inode *inode, struct file *filp)
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{
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return single_open(filp, sched_feat_show, NULL);
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}
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static const struct file_operations sched_feat_fops = {
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.open = sched_feat_open,
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.write = sched_feat_write,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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static __init int sched_init_debug(void)
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{
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debugfs_create_file("sched_features", 0644, NULL, NULL,
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&sched_feat_fops);
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return 0;
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}
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late_initcall(sched_init_debug);
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#endif /* CONFIG_SCHED_DEBUG */
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/*
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* Number of tasks to iterate in a single balance run.
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* Limited because this is done with IRQs disabled.
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@ -16,6 +16,7 @@
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#include <linux/kallsyms.h>
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#include <linux/utsname.h>
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#include <linux/mempolicy.h>
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#include <linux/debugfs.h>
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#include "sched.h"
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@ -58,6 +59,136 @@ static unsigned long nsec_low(unsigned long long nsec)
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#define SPLIT_NS(x) nsec_high(x), nsec_low(x)
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#define SCHED_FEAT(name, enabled) \
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#name ,
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static const char * const sched_feat_names[] = {
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#include "features.h"
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};
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#undef SCHED_FEAT
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static int sched_feat_show(struct seq_file *m, void *v)
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{
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int i;
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for (i = 0; i < __SCHED_FEAT_NR; i++) {
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if (!(sysctl_sched_features & (1UL << i)))
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seq_puts(m, "NO_");
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seq_printf(m, "%s ", sched_feat_names[i]);
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}
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seq_puts(m, "\n");
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return 0;
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}
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#ifdef HAVE_JUMP_LABEL
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#define jump_label_key__true STATIC_KEY_INIT_TRUE
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#define jump_label_key__false STATIC_KEY_INIT_FALSE
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#define SCHED_FEAT(name, enabled) \
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jump_label_key__##enabled ,
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struct static_key sched_feat_keys[__SCHED_FEAT_NR] = {
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#include "features.h"
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};
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#undef SCHED_FEAT
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static void sched_feat_disable(int i)
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{
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static_key_disable(&sched_feat_keys[i]);
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}
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static void sched_feat_enable(int i)
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{
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static_key_enable(&sched_feat_keys[i]);
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}
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#else
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static void sched_feat_disable(int i) { };
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static void sched_feat_enable(int i) { };
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#endif /* HAVE_JUMP_LABEL */
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static int sched_feat_set(char *cmp)
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{
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int i;
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int neg = 0;
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if (strncmp(cmp, "NO_", 3) == 0) {
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neg = 1;
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cmp += 3;
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}
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for (i = 0; i < __SCHED_FEAT_NR; i++) {
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if (strcmp(cmp, sched_feat_names[i]) == 0) {
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if (neg) {
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sysctl_sched_features &= ~(1UL << i);
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sched_feat_disable(i);
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} else {
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sysctl_sched_features |= (1UL << i);
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sched_feat_enable(i);
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}
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break;
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}
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}
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return i;
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}
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static ssize_t
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sched_feat_write(struct file *filp, const char __user *ubuf,
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size_t cnt, loff_t *ppos)
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{
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char buf[64];
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char *cmp;
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int i;
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struct inode *inode;
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if (cnt > 63)
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cnt = 63;
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if (copy_from_user(&buf, ubuf, cnt))
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return -EFAULT;
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buf[cnt] = 0;
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cmp = strstrip(buf);
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/* Ensure the static_key remains in a consistent state */
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inode = file_inode(filp);
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inode_lock(inode);
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i = sched_feat_set(cmp);
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inode_unlock(inode);
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if (i == __SCHED_FEAT_NR)
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return -EINVAL;
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*ppos += cnt;
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return cnt;
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}
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static int sched_feat_open(struct inode *inode, struct file *filp)
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{
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return single_open(filp, sched_feat_show, NULL);
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}
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static const struct file_operations sched_feat_fops = {
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.open = sched_feat_open,
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.write = sched_feat_write,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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static __init int sched_init_debug(void)
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{
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debugfs_create_file("sched_features", 0644, NULL, NULL,
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&sched_feat_fops);
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return 0;
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}
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late_initcall(sched_init_debug);
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#ifdef CONFIG_FAIR_GROUP_SCHED
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static void print_cfs_group_stats(struct seq_file *m, int cpu, struct task_group *tg)
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{
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