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Commit 65b2074f authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'sched-core-for-linus' of... 

Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

* 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (30 commits)
  sched: Change wait_for_completion_*_timeout() to return a signed long
  sched, autogroup: Fix reference leak
  sched, autogroup: Fix potential access to freed memory
  sched: Remove redundant CONFIG_CGROUP_SCHED ifdef
  sched: Fix interactivity bug by charging unaccounted run-time on entity re-weight
  sched: Move periodic share updates to entity_tick()
  printk: Use this_cpu_{read|write} api on printk_pending
  sched: Make pushable_tasks CONFIG_SMP dependant
  sched: Add 'autogroup' scheduling feature: automated per session task groups
  sched: Fix unregister_fair_sched_group()
  sched: Remove unused argument dest_cpu to migrate_task()
  mutexes, sched: Introduce arch_mutex_cpu_relax()
  sched: Add some clock info to sched_debug
  cpu: Remove incorrect BUG_ON
  cpu: Remove unused variable
  sched: Fix UP build breakage
  sched: Make task dump print all 15 chars of proc comm
  sched: Update tg->shares after cpu.shares write
  sched: Allow update_cfs_load() to update global load
  sched: Implement demand based update_cfs_load()
  ...
parents 28d9bfc3 6bf41237

Documentation/kernel-parameters.txt

+2 −0
Original line number Diff line number Diff line
@@ -1614,6 +1614,8 @@ and is between 256 and 4096 characters. It is defined in the file 
	noapic		[SMP,APIC] Tells the kernel to not make use of any

			IOAPICs that may be present in the system.



	noautogroup	Disable scheduler automatic task group creation.



	nobats		[PPC] Do not use BATs for mapping kernel lowmem

			on "Classic" PPC cores.

arch/Kconfig

+3 −0
Original line number Diff line number Diff line
@@ -175,4 +175,7 @@ config HAVE_PERF_EVENTS_NMI 
config HAVE_ARCH_JUMP_LABEL

	bool



config HAVE_ARCH_MUTEX_CPU_RELAX

	bool



source "kernel/gcov/Kconfig"

arch/s390/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -99,6 +99,7 @@ config S390 
	select HAVE_KERNEL_LZMA

	select HAVE_KERNEL_LZO

	select HAVE_GET_USER_PAGES_FAST

	select HAVE_ARCH_MUTEX_CPU_RELAX

	select ARCH_INLINE_SPIN_TRYLOCK

	select ARCH_INLINE_SPIN_TRYLOCK_BH

	select ARCH_INLINE_SPIN_LOCK

arch/s390/include/asm/mutex.h

+2 −0
Original line number Diff line number Diff line
@@ -7,3 +7,5 @@ 
 */



#include <asm-generic/mutex-dec.h>



#define arch_mutex_cpu_relax()	barrier()

fs/proc/base.c

+79 −0
Original line number Diff line number Diff line
@@ -1407,6 +1407,82 @@ static const struct file_operations proc_pid_sched_operations = { 


#endif



#ifdef CONFIG_SCHED_AUTOGROUP

/*

 * Print out autogroup related information:

 */

static int sched_autogroup_show(struct seq_file *m, void *v)

{

	struct inode *inode = m->private;

	struct task_struct *p;



	p = get_proc_task(inode);

	if (!p)

		return -ESRCH;

	proc_sched_autogroup_show_task(p, m);



	put_task_struct(p);



	return 0;

}



static ssize_t

sched_autogroup_write(struct file *file, const char __user *buf,

	    size_t count, loff_t *offset)

{

	struct inode *inode = file->f_path.dentry->d_inode;

	struct task_struct *p;

	char buffer[PROC_NUMBUF];

	long nice;

	int err;



	memset(buffer, 0, sizeof(buffer));

	if (count > sizeof(buffer) - 1)

		count = sizeof(buffer) - 1;

	if (copy_from_user(buffer, buf, count))

		return -EFAULT;



	err = strict_strtol(strstrip(buffer), 0, &nice);

	if (err)

		return -EINVAL;



	p = get_proc_task(inode);

	if (!p)

		return -ESRCH;



	err = nice;

	err = proc_sched_autogroup_set_nice(p, &err);

	if (err)

		count = err;



	put_task_struct(p);



	return count;

}



static int sched_autogroup_open(struct inode *inode, struct file *filp)

{

	int ret;



	ret = single_open(filp, sched_autogroup_show, NULL);

	if (!ret) {

		struct seq_file *m = filp->private_data;



		m->private = inode;

	}

	return ret;

}



static const struct file_operations proc_pid_sched_autogroup_operations = {

	.open		= sched_autogroup_open,

	.read		= seq_read,

	.write		= sched_autogroup_write,

	.llseek		= seq_lseek,

	.release	= single_release,

};



#endif /* CONFIG_SCHED_AUTOGROUP */



static ssize_t comm_write(struct file *file, const char __user *buf,

				size_t count, loff_t *offset)

{
@@ -2732,6 +2808,9 @@ static const struct pid_entry tgid_base_stuff[] = { 
	INF("limits",	  S_IRUGO, proc_pid_limits),

#ifdef CONFIG_SCHED_DEBUG

	REG("sched",      S_IRUGO|S_IWUSR, proc_pid_sched_operations),

#endif

#ifdef CONFIG_SCHED_AUTOGROUP

	REG("autogroup",  S_IRUGO|S_IWUSR, proc_pid_sched_autogroup_operations),

#endif

	REG("comm",      S_IRUGO|S_IWUSR, proc_pid_set_comm_operations),

#ifdef CONFIG_HAVE_ARCH_TRACEHOOK