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Peter Zijlstra 3ccf3e8306 printk/sched: Introduce special printk_sched() for those awkward moments 
There's a few awkward printk()s inside of scheduler guts that people
prefer to keep but really are rather deadlock prone. Fudge around it
by storing the text in a per-cpu buffer and poll it using the existing
printk_tick() handler.

This will drop output when its more frequent than once a tick, however
only the affinity thing could possible go that fast and for that just
one should suffice to notify the admin he's done something silly..

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Link: http://lkml.kernel.org/n/tip-wua3lmkt3dg8nfts66o6brne@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2012-03-12 20:43:16 +01:00
..
debug
module: struct module_ref should contains long fields
2012-01-13 09:32:14 +10:30
events
perf: Fix double start/stop in x86_pmu_start()
2012-02-07 16:58:56 +01:00
gcov
gcov: disable CONSTRUCTORS for UML
2011-07-26 16:49:45 -07:00
irq
genirq: Handle pending irqs in irq_startup()
2012-02-15 11:56:59 +01:00
power
PM / Freezer: Thaw only kernel threads if freezing of kernel threads fails
2012-02-04 22:23:05 +01:00
sched
printk/sched: Introduce special printk_sched() for those awkward moments
2012-03-12 20:43:16 +01:00
time
Merge branch 'rcu/fixes-for-v3.2' into rcu/urgent
2012-01-16 09:41:18 -08:00
trace
Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2012-01-15 11:26:35 -08:00
.gitignore
…
acct.c
Merge branch 'for-linus2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2012-01-08 12:19:57 -08:00
async.c
kernel/async: remove redundant declaration.
2012-01-13 09:32:18 +10:30
audit_tree.c
audit_tree,rcu: Convert call_rcu(__put_tree) to kfree_rcu()
2011-07-20 14:10:11 -07:00
audit_watch.c
…
audit.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/audit
2012-01-17 16:41:31 -08:00
audit.h
audit: remove AUDIT_SETUP_CONTEXT as it isn't used
2012-01-17 16:16:57 -05:00
auditfilter.c
audit: allow interfield comparison in audit rules
2012-01-17 16:17:01 -05:00
auditsc.c
kernel-doc: fix new warnings in auditsc.c
2012-01-23 08:44:53 -08:00
backtracetest.c
…
bounds.c
…
capability.c
Revert "capabitlies: ns_capable can use the cap helpers rather than lsm call"
2012-01-17 10:19:41 -08:00
cgroup_freezer.c
Merge branch 'for-3.3' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup
2012-01-09 12:59:24 -08:00
cgroup.c
Merge branch 'for-3.3' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup
2012-01-09 12:59:24 -08:00
compat.c
kernel: Fix files explicitly needing EXPORT_SYMBOL infrastructure
2011-10-31 19:30:05 -04:00
configs.c
kernel/configs.c: include MODULE_*() when CONFIG_IKCONFIG_PROC=n
2011-07-25 20:57:15 -07:00
cpu_pm.c
cpu_pm: call notifiers during suspend
2011-09-23 12:05:29 +05:30
cpu.c
Merge branch 'pm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
2012-01-08 13:10:57 -08:00
cpuset.c
Merge branch 'for-3.3' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup
2012-01-09 12:59:24 -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
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
delayacct.c
KVM: Steal time implementation
2011-07-14 12:59:14 +03:00
dma.c
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
elfcore.c
…
exec_domain.c
…
exit.c
sched: Fix ancient race in do_exit()
2012-01-27 11:55:36 +01:00
extable.c
extable, core_kernel_data(): Make sure all archs define _sdata
2011-05-20 08:56:56 +02:00
fork.c
epoll: introduce POLLFREE to flush ->signalfd_wqh before kfree()
2012-02-24 11:42:50 -08:00
freezer.c
freezer: kill unused set_freezable_with_signal()
2011-11-23 09:28:17 -08:00
futex_compat.c
…
futex.c
futex: Fix uninterruptible loop due to gate_area
2011-12-31 11:48:28 -08:00
groups.c
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
hrtimer.c
Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2011-11-28 08:43:52 -08:00
hung_task.c
hung_task: fix false positive during vfork
2012-01-03 16:14:32 -08:00
irq_work.c
kernel: fix two implicit header assumptions in irq_work.c
2011-10-31 09:20:12 -04:00
itimer.c
[S390] cputime: add sparse checking and cleanup
2011-12-15 14:56:19 +01:00
jump_label.c
Merge remote-tracking branch 'tip/perf/core' into kvm-updates/3.3
2011-12-27 11:22:24 +02:00
kallsyms.c
…
Kconfig.freezer
…
Kconfig.hz
…
Kconfig.locks
…
Kconfig.preempt
sched: Isolate preempt counting in its own config option
2011-06-10 15:15:40 +02:00
kexec.c
kdump: crashk_res init check for /sys/kernel/kexec_crash_size
2012-01-12 20:13:11 -08:00
kfifo.c
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
kmod.c
Merge branch 'pm-sleep' into pm-for-linus
2011-12-25 23:42:20 +01:00
kprobes.c
kprobes: fix a memory leak in function pre_handler_kretprobe()
2012-02-03 16:16:41 -08:00
ksysfs.c
kernel: ksysfs.c is implicitly using stat.h
2011-10-31 09:20:13 -04:00
kthread.c
freezer: kill unused set_freezable_with_signal()
2011-11-23 09:28:17 -08:00
latencytop.c
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
lockdep_internals.h
…
lockdep_proc.c
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
lockdep_states.h
…
lockdep.c
Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2012-01-06 08:02:58 -08:00
Makefile
PM: Make sysrq-o be available for CONFIG_PM unset
2012-01-14 00:33:03 +01:00
module.c
error: implicit declaration of function 'module_flags_taint'
2012-01-15 16:21:07 -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: Use schedule_preempt_disabled()
2012-03-01 10:28:03 +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
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
padata.c
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
panic.c
panic: don't print redundant backtraces on oops
2012-01-12 20:13:11 -08:00
params.c
module: make module param bint handle nul value
2012-02-14 11:02:15 +10:30
pid_namespace.c
sysctl: add the kernel.ns_last_pid control
2012-01-12 20:13:11 -08:00
pid.c
vfs: fix panic in __d_lookup() with high dentry hashtable counts
2012-02-13 20:45:38 -05:00
posix-cpu-timers.c
[S390] cputime: add sparse checking and cleanup
2011-12-15 14:56:19 +01:00
posix-timers.c
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
printk.c
printk/sched: Introduce special printk_sched() for those awkward moments
2012-03-12 20:43:16 +01:00
profile.c
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
ptrace.c
Merge branch 'for-linus' of git://selinuxproject.org/~jmorris/linux-security
2012-01-14 18:36:33 -08:00
range.c
range: fix bogus misuse of module.h to get printk()
2011-10-31 09:20:11 -04:00
rcu.h
rcu: Deconfuse dynticks entry-exit tracing
2011-12-11 10:31:42 -08:00
rcupdate.c
rcu: Detect illegal rcu dereference in extended quiescent state
2011-12-11 10:31:30 -08:00
rcutiny_plugin.h
rcu: Apply ACCESS_ONCE() to rcu_boost() return value
2011-12-11 10:33:19 -08:00
rcutiny.c
rcu: Augment rcu_batch_end tracing for idle and callback state
2011-12-11 10:32:22 -08:00
rcutorture.c
rcu: Add missing __cpuinit annotation in rcutorture code
2012-01-16 09:44:05 -08:00
rcutree_plugin.h
rcu: Apply ACCESS_ONCE() to rcu_boost() return value
2011-12-11 10:33:19 -08:00
rcutree_trace.c
rcu: Track idleness independent of idle tasks
2011-12-11 10:31:24 -08:00
rcutree.c
rcu: Augment rcu_batch_end tracing for idle and callback state
2011-12-11 10:32:22 -08:00
rcutree.h
rcu: Keep invoking callbacks if CPU otherwise idle
2011-12-11 10:32:09 -08:00
relay.c
relay: prevent integer overflow in relay_open()
2012-02-10 09:04:49 +01:00
res_counter.c
net: introduce res_counter_charge_nofail() for socket allocations
2012-01-22 15:08:46 -05:00
resource.c
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
rtmutex_common.h
…
rtmutex-debug.c
lockdep, rtmutex, bug: Show taint flags on error
2011-12-06 08:16:49 +01:00
rtmutex-debug.h
…
rtmutex-tester.c
rtmutex-tester: convert sysdev_class to a regular subsystem
2011-12-14 14:54:22 -08:00
rtmutex.c
Revert "rcu: Permit rt_mutex_unlock() with irqs disabled"
2011-12-11 10:33:18 -08:00
rtmutex.h
…
rwsem.c
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
seccomp.c
seccomp: audit abnormal end to a process due to seccomp
2012-01-17 16:16:55 -05:00
semaphore.c
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
signal.c
user namespace: make signal.c respect user namespaces
2012-01-10 16:30:54 -08:00
smp.c
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
softirq.c
sched/rt: Document scheduler related skip-resched-check sites
2012-03-01 10:28:04 +01:00
spinlock.c
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
srcu.c
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
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
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
sys_ni.c
Cross Memory Attach
2011-10-31 17:30:44 -07:00
sys.c
c/r: prctl: add PR_SET_MM codes to set up mm_struct entries
2012-01-12 20:13:13 -08:00
sysctl_binary.c
binary_sysctl(): fix memory leak
2011-12-20 10:25:04 -08:00
sysctl_check.c
xfs: remove subdirectories
2011-08-12 16:21:35 -05:00
sysctl.c
x86: Panic on detection of stack overflow
2011-12-05 11:37:47 +01:00
taskstats.c
Make TASKSTATS require root access
2011-09-19 17:04:37 -07:00
test_kprobes.c
…
time.c
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
timeconst.pl
…
timer.c
Merge branch 'core-debugobjects-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2012-01-06 07:53:34 -08:00
tracepoint.c
tracepoints/module: Fix disabling tracepoints with taint CRAP or OOT
2012-01-16 11:35:57 -05:00
tsacct.c
[S390] cputime: add sparse checking and cleanup
2011-12-15 14:56:19 +01:00
uid16.c
…
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
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
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
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
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
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
wait.c
lockdep/waitqueues: Add better annotation
2011-12-21 10:07:39 +01:00
watchdog.c
bugs, x86: Fix printk levels for panic, softlockups and stack dumps
2012-01-26 21:28:45 +01:00
workqueue_sched.h
…
workqueue.c
workqueue: make alloc_workqueue() take printf fmt and args for name
2012-01-10 16:30:54 -08:00