Task3

task3/Readme.md

@@ -0,0 +1 @@
+Ожидается, что исходники ядра лежат в dev/linux-6.7.4/

task3/patch

@@ -0,0 +1,84 @@
+diff --git a/dev/linux-6.7.4/fs/proc/base.c b/dev/linux-6.7.4/fs/proc/base.c
+index dd31e3b..3f1b03e 100644
+--- a/dev/linux-6.7.4/fs/proc/base.c
++++ b/dev/linux-6.7.4/fs/proc/base.c
+@@ -488,6 +488,17 @@ static int proc_pid_schedstat(struct seq_file *m, struct pid_namespace *ns,
+ }
+ #endif
+
++static int proc_pid_sched_counter(struct seq_file *m, struct pid_namespace *ns,
++			      struct pid *pid, struct task_struct *task)
++{
++	if (unlikely(!sched_info_on()))
++		seq_puts(m, "0\n");
++	else
++		seq_printf(m, "%d\n", atomic_read(&task->sched_counter));
++
++	return 0;
++}
++
+ #ifdef CONFIG_LATENCYTOP
+ static int lstats_show_proc(struct seq_file *m, void *v)
+ {
+@@ -3293,6 +3304,7 @@ static const struct pid_entry tgid_base_stuff[] = {
+ 	REG("smaps_rollup", S_IRUGO, proc_pid_smaps_rollup_operations),
+ 	REG("pagemap",    S_IRUSR, proc_pagemap_operations),
+ #endif
++	ONE("sched_counter",   S_IRUGO, proc_pid_sched_counter),
+ #ifdef CONFIG_SECURITY
+ 	DIR("attr",       S_IRUGO|S_IXUGO, proc_attr_dir_inode_operations, proc_attr_dir_operations),
+ #endif
+@@ -3642,6 +3654,7 @@ static const struct pid_entry tid_base_stuff[] = {
+ 	REG("smaps_rollup", S_IRUGO, proc_pid_smaps_rollup_operations),
+ 	REG("pagemap",    S_IRUSR, proc_pagemap_operations),
+ #endif
++	ONE("sched_counter",   S_IRUGO, proc_pid_sched_counter),
+ #ifdef CONFIG_SECURITY
+ 	DIR("attr",      S_IRUGO|S_IXUGO, proc_attr_dir_inode_operations, proc_attr_dir_operations),
+ #endif
+diff --git a/dev/linux-6.7.4/include/linux/sched.h b/dev/linux-6.7.4/include/linux/sched.h
+index 292c316..f6e71ab 100644
+--- a/dev/linux-6.7.4/include/linux/sched.h
++++ b/dev/linux-6.7.4/include/linux/sched.h
+@@ -751,6 +751,9 @@ struct task_struct {
+ 	 */
+ 	struct thread_info		thread_info;
+ #endif
++	/* Task 3 field */
++	atomic_t			sched_counter;
++
+ 	unsigned int			__state;
+
+ 	/* saved state for "spinlock sleepers" */
+@@ -1385,6 +1388,7 @@ struct task_struct {
+ #endif
+
+ #ifdef CONFIG_FUNCTION_GRAPH_TRACER
++
+ 	/* Index of current stored address in ret_stack: */
+ 	int				curr_ret_stack;
+ 	int				curr_ret_depth;
+diff --git a/dev/linux-6.7.4/init/init_task.c b/dev/linux-6.7.4/init/init_task.c
+index 5727d42..67a83ec 100644
+--- a/dev/linux-6.7.4/init/init_task.c
++++ b/dev/linux-6.7.4/init/init_task.c
+@@ -71,6 +71,7 @@ struct task_struct init_task
+ 	.thread_info	= INIT_THREAD_INFO(init_task),
+ 	.stack_refcount	= REFCOUNT_INIT(1),
+ #endif
++	.sched_counter	= ATOMIC_INIT(0),
+ 	.__state	= 0,
+ 	.stack		= init_stack,
+ 	.usage		= REFCOUNT_INIT(2),
+diff --git a/dev/linux-6.7.4/kernel/sched/core.c b/dev/linux-6.7.4/kernel/sched/core.c
+index a708d22..1d7d4d7 100644
+--- a/dev/linux-6.7.4/kernel/sched/core.c
++++ b/dev/linux-6.7.4/kernel/sched/core.c
+@@ -6650,6 +6650,7 @@ static void __sched notrace __schedule(unsigned int sched_mode)
+ 	}
+
+ 	next = pick_next_task(rq, prev, &rf);
++	atomic_inc(&next->sched_counter);
+ 	clear_tsk_need_resched(prev);
+ 	clear_preempt_need_resched();
+ #ifdef CONFIG_SCHED_DEBUG