Nathan Zimmer bbbfeac92b sched: Fix /proc/sched_debug failure on very very large systems ...

On systems with 4096 cores attemping to read /proc/sched_debug
fails because we are trying to push all the data into a single
kmalloc buffer.

The issue is on these very large machines all the data will not
fit in 4mb.

A better solution is to not us the single_open mechanism but to
provide our own seq_operations and treat each cpu as an
individual record.

The output should be identical to the previous version.

Reported-by: Dave Jones <davej@redhat.com>
Signed-off-by: Nathan Zimmer <nzimmer@sgi.com>
Cc: Peter Zijlstra <peterz@infradead.org>)
[ Whitespace fixlet]
[ Fix spello in comment]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>

2013-02-22 10:27:25 +01:00

..

debug

module: add new state MODULE_STATE_UNFORMED.

2013-01-12 13:27:05 +10:30

events

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

2013-02-19 17:49:41 -08:00

gcov

gcov: disable CONSTRUCTORS for UML

2011-07-26 16:49:45 -07:00

irq

Merge branch 'x86-apic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2013-02-19 19:07:27 -08:00

power

Merge branch 'for-3.8' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup

2012-12-12 08:18:24 -08:00

sched

sched: Fix /proc/sched_debug failure on very very large systems

2013-02-22 10:27:25 +01:00

time

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

2013-02-19 19:05:45 -08:00

trace

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

2013-02-19 18:19:48 -08:00

.gitignore

…

acct.c

cputime: Use accessors to read task cputime stats

2013-01-27 19:23:31 +01:00

async.c

Merge branch 'for-3.9' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq

2013-02-19 22:01:33 -08:00

audit_tree.c

audit: catch possible NULL audit buffers

2013-01-11 14:54:55 -08:00

audit_watch.c

audit: catch possible NULL audit buffers

2013-01-11 14:54:55 -08:00

audit.c

kernel/audit.c: avoid negative sleep durations

2013-01-11 14:54:56 -08:00

audit.h

audit: optimize audit_compare_dname_path

2012-10-12 00:32:02 -04:00

auditfilter.c

audit: fix auditfilter.c kernel-doc warnings

2013-01-10 14:35:23 -08:00

auditsc.c

audit: catch possible NULL audit buffers

2013-01-11 14:54:55 -08:00

backtracetest.c

…

bounds.c

…

capability.c

userns: Teach inode_capable to understand inodes whose uids map to other namespaces.

2012-05-15 14:59:24 -07:00

cgroup_freezer.c

cgroup: rename ->create/post_create/pre_destroy/destroy() to ->css_alloc/online/offline/free()

2012-11-19 08:13:38 -08:00

cgroup.c

Merge branch 'akpm' (Andrew's patch-bomb)

2012-12-17 20:58:12 -08:00

compat.c

x32: fix sigtimedwait

2012-12-26 01:15:03 -05:00

configs.c

kernel/configs.c: include MODULE_*() when CONFIG_IKCONFIG_PROC=n

2011-07-25 20:57:15 -07:00

context_tracking.c

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

2013-02-19 18:19:48 -08:00

cpu_pm.c

kernel/cpu_pm.c: fix various typos

2012-05-31 17:49:27 -07:00

cpu.c

Merge branch 'smp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2013-02-19 19:04:55 -08:00

cpuset.c

cpuset: use N_MEMORY instead N_HIGH_MEMORY

2012-12-12 17:38:32 -08:00

crash_dump.c

Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux

2011-11-06 19:44:47 -08:00

cred.c

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace

2012-12-18 10:55:28 -08:00

delayacct.c

cputime: Use accessors to read task cputime stats

2013-01-27 19:23:31 +01:00

dma.c

Remove all #inclusions of asm/system.h

2012-03-28 18:30:03 +01:00

elfcore.c

…

exec_domain.c

…

exit.c

cputime: Use accessors to read task cputime stats

2013-01-27 19:23:31 +01:00

extable.c

extable: Skip sorting if sorted at build time.

2012-04-19 15:06:55 -07:00

fork.c

Merge tag 'full-dynticks-cputime-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks into sched/core

2013-02-05 13:10:33 +01:00

freezer.c

freezer: change ptrace_stop/do_signal_stop to use freezable_schedule()

2012-10-26 14:27:49 -07:00

futex_compat.c

futex: Mark get_robust_list as deprecated

2012-03-29 11:37:17 +02:00

futex.c

sched/rt: Move rt specific bits into new header file

2013-02-07 20:51:08 +01:00

groups.c

userns: Convert in_group_p and in_egroup_p to use kgid_t

2012-05-03 03:29:33 -07:00

hrtimer.c

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

2013-02-19 19:05:45 -08:00

hung_task.c

hung task debugging: Inject NMI when hung and going to panic

2012-04-25 12:39:25 +02:00

irq_work.c

Merge branch 'nohz/printk-v8' into irq/core

2013-02-05 00:48:46 +01:00

itimer.c

itimer: Use printk_once instead of WARN_ONCE

2012-04-10 11:00:30 +02:00

jump_label.c

jump_label: Export jump_label_rate_limit()

2012-08-06 19:00:35 +03:00

kallsyms.c

vsprintf: fix %ps on non symbols when using kallsyms

2012-05-29 16:22:32 -07:00

kcmp.c

kcmp: include linux/ptrace.h

2012-12-20 17:40:19 -08:00

Kconfig.freezer

…

Kconfig.hz

…

Kconfig.locks

locking: Adjust spin lock inlining Kconfig options

2012-09-13 17:56:13 +02:00

Kconfig.preempt

locking/kconfig: Simplify INLINE_SPIN_UNLOCK usage

2012-03-23 13:18:57 +01:00

kexec.c

kdump: remove unneeded include

2012-10-06 03:05:19 +09:00

kfifo.c

[media] kernel:kfifo: export __kfifo_max_r symbol

2012-04-11 18:24:37 -03:00

kmod.c

Merge branch 'master' into for-3.9-async

2013-01-23 09:31:01 -08:00

kprobes.c

Merge branch 'for-3.9-cleanups' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq

2013-02-19 21:58:52 -08:00

ksysfs.c

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

2012-12-11 18:10:49 -08:00

kthread.c

kthread: use N_MEMORY instead N_HIGH_MEMORY

2012-12-12 17:38:33 -08:00

latencytop.c

kernel: Map most files to use export.h instead of module.h

2011-10-31 09:20:12 -04:00

lglock.c

brlocks/lglocks: turn into functions

2012-05-29 23:28:41 -04:00

lockdep_internals.h

…

lockdep_proc.c

lockdep: Use KSYM_NAME_LEN'ed buffer for __get_key_name()

2012-10-24 12:39:09 +02:00

lockdep_states.h

…

lockdep.c

lockdep: Check if nested lock is actually held

2012-09-13 17:00:44 +02:00

Makefile

Merge tag 'modules-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux

2012-12-19 07:55:08 -08:00

modsign_certificate.S

MODSIGN: Avoid using .incbin in C source

2012-12-14 13:06:44 +10:30

modsign_pubkey.c

keys: use keyring_alloc() to create module signing keyring

2012-12-20 17:40:21 -08:00

module_signing.c

MODSIGN: Don't use enum-type bitfields in module signature info block

2012-12-05 11:27:24 +10:30

module-internal.h

MODSIGN: Move the magic string to the end of a module and eliminate the search

2012-10-19 17:30:40 -07:00

module.c

module: fix missing module_mutex unlock

2013-01-20 20:22:58 -08:00

mutex-debug.c

kernel: Map most files to use export.h instead of module.h

2011-10-31 09:20:12 -04:00

mutex-debug.h

…

mutex.c

sched/rt: Move rt specific bits into new header file

2013-02-07 20:51:08 +01:00

mutex.h

…

notifier.c

kernel: Map most files to use export.h instead of module.h

2011-10-31 09:20:12 -04:00

nsproxy.c

userns: Implement unshare of the user namespace

2012-11-20 04:18:14 -08:00

padata.c

padata: use __this_cpu_read per-cpu helper

2012-12-06 17:16:23 +08:00

panic.c

panic: fix a possible deadlock in panic()

2012-07-30 17:25:13 -07:00

params.c

params: replace printk(KERN_<LVL>...) with pr_<lvl>(...)

2012-05-04 17:28:18 -07:00

pid_namespace.c

pidns: Stop pid allocation when init dies

2012-12-25 16:10:05 -08:00

pid.c

kernel/pid.c: reenable interrupts when alloc_pid() fails because init has exited

2013-02-12 14:34:00 -08:00

posix-cpu-timers.c

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

2013-02-19 19:05:45 -08:00

posix-timers.c

posix-timers: Fix clock_adjtime to always return timex data on success

2013-01-15 18:16:07 -08:00

printk.c

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

2013-02-19 17:47:58 -08:00

profile.c

profiling: Remove unused timer hook

2013-01-24 15:37:26 +01:00

ptrace.c

uprobes: Add exports for module use

2013-02-08 17:47:13 +01:00

range.c

range: fix bogus misuse of module.h to get printk()

2011-10-31 09:20:11 -04:00

rcu.h

rcu: Provide RCU CPU stall warnings for tiny RCU

2013-01-28 22:06:21 -08:00

rcupdate.c

Merge branches 'doctorture.2013.01.29a', 'fixes.2013.01.26a', 'tagcb.2013.01.24a' and 'tiny.2013.01.29b' into HEAD

2013-01-28 22:25:21 -08:00

rcutiny_plugin.h

rcu: Provide RCU CPU stall warnings for tiny RCU

2013-01-28 22:06:21 -08:00

rcutiny.c

Merge branches 'doctorture.2013.01.29a', 'fixes.2013.01.26a', 'tagcb.2013.01.24a' and 'tiny.2013.01.29b' into HEAD

2013-01-28 22:25:21 -08:00

rcutorture.c

rcu: Allow rcutorture to be built at low optimization levels

2013-02-04 12:18:20 -08:00

rcutree_plugin.h

rcu: Make rcu_nocb_poll an early_param instead of module_param

2013-01-08 14:12:19 -08:00

rcutree_trace.c

rcu: Separate accounting of callbacks from callback-free CPUs

2012-11-16 10:05:57 -08:00

rcutree.c

Merge branches 'doctorture.2013.01.29a', 'fixes.2013.01.26a', 'tagcb.2013.01.24a' and 'tiny.2013.01.29b' into HEAD

2013-01-28 22:25:21 -08:00

rcutree.h

Merge branches 'doctorture.2013.01.29a', 'fixes.2013.01.26a', 'tagcb.2013.01.24a' and 'tiny.2013.01.29b' into HEAD

2013-01-28 22:25:21 -08:00

relay.c

splice: fix racy pipe->buffers uses

2012-06-13 21:16:42 +02:00

res_counter.c

res_counter: return amount of charges after res_counter_uncharge()

2012-12-18 15:02:12 -08:00

resource.c

kernel/resource.c: fix stack overflow in __reserve_region_with_split()

2012-10-06 03:05:31 +09:00

rtmutex_common.h

…

rtmutex-debug.c

sched/rt: Move rt specific bits into new header file

2013-02-07 20:51:08 +01:00

rtmutex-debug.h

…

rtmutex-tester.c

sched/rt: Move rt specific bits into new header file

2013-02-07 20:51:08 +01:00

rtmutex.c

sched/rt: Move rt specific bits into new header file

2013-02-07 20:51:08 +01:00

rtmutex.h

…

rwsem.c

lockdep, rwsem: provide down_write_nest_lock()

2013-01-11 14:54:55 -08:00

seccomp.c

seccomp: Make syscall skipping and nr changes more consistent

2012-10-02 21:14:29 +10:00

semaphore.c

semaphore: fix improper comment reference to mutex

2012-04-05 17:15:55 -07:00

signal.c

Merge tag 'full-dynticks-cputime-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks into sched/core

2013-02-05 13:10:33 +01:00

smp.c

smp: Fix SMP function call empty cpu mask race

2013-01-28 11:21:57 +01:00

smpboot.c

smpboot: Allow selfparking per cpu threads

2013-02-14 15:29:37 +01:00

smpboot.h

smpboot: Provide infrastructure for percpu hotplug threads

2012-08-13 17:01:07 +02:00

softirq.c

cputime: Safely read cputime of full dynticks CPUs

2013-01-27 20:35:47 +01:00

spinlock.c

locking/kconfig: Simplify INLINE_SPIN_UNLOCK usage

2012-03-23 13:18:57 +01:00

srcu.c

srcu: use ACCESS_ONCE() to access sp->completed in srcu_read_lock()

2013-02-07 15:19:36 -08:00

stacktrace.c

kernel: Map most files to use export.h instead of module.h

2011-10-31 09:20:12 -04:00

stop_machine.c

stop_machine: Use smpboot threads

2013-02-14 15:29:38 +01:00

sys_ni.c

module: add syscall to load module from fd

2012-12-14 13:05:22 +10:30

sys.c

cputime: Rename thread_group_times to thread_group_cputime_adjusted

2012-11-28 17:07:57 +01:00

sysctl_binary.c

pidns: Use task_active_pid_ns where appropriate

2012-11-19 05:59:09 -08:00

sysctl.c

sched/rt: Add a tuning knob to allow changing SCHED_RR timeslice

2013-02-07 20:51:07 +01:00

task_work.c

task_work: task_work_add() should not succeed after exit_task_work()

2012-09-13 16:47:34 +02:00

taskstats.c

taskstats: cgroupstats_user_cmd() may leak on error

2012-10-06 03:05:31 +09:00

test_kprobes.c

…

time.c

time, Fix setting of hardware clock in NTP code

2013-02-08 15:07:05 -08:00

timeconst.pl

timeconst.pl: Eliminate Perl warning

2013-02-07 17:14:08 -08:00

timer.c

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

2013-02-19 18:19:48 -08:00

tracepoint.c

static keys: Introduce 'struct static_key', static_key_true()/false() and static_key_slow_[inc|dec]()

2012-02-24 10:05:59 +01:00

tsacct.c

cputime: Use accessors to read task cputime stats

2013-01-27 19:23:31 +01:00

uid16.c

userns: Convert setting and getting uid and gid system calls to use kuid and kgid

2012-05-03 03:28:41 -07:00

up.c

kernel: Map most files to use export.h instead of module.h

2011-10-31 09:20:12 -04:00

user_namespace.c

userns: Fix typo in description of the limitation of userns_install

2012-12-14 18:36:36 -08:00

user-return-notifier.c

kernel: Map most files to use export.h instead of module.h

2011-10-31 09:20:12 -04:00

user.c

proc: Usable inode numbers for the namespace file descriptors.

2012-11-20 04:19:49 -08:00

utsname_sysctl.c

Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux

2011-11-06 19:44:47 -08:00

utsname.c

userns: Require CAP_SYS_ADMIN for most uses of setns.

2012-12-14 16:12:03 -08:00

wait.c

propagate name change to comments in kernel source

2012-12-06 10:39:54 +01:00

watchdog.c

sched/rt: Move rt specific bits into new header file

2013-02-07 20:51:08 +01:00

workqueue_internal.h

workqueue: rename cpu_workqueue to pool_workqueue

2013-02-13 19:29:12 -08:00

workqueue.c

workqueue: un-GPL function delayed_work_timer_fn()

2013-02-19 10:09:13 -08:00