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Dave Young af91322ef3 printk: add printk_delay to make messages readable for some scenarios 
When syslog is not possible, at the same time there's no serial/net
console available, it will be hard to read the printk messages.  For
example oops/panic/warning messages in shutdown phase.

Add a printk delay feature, we can make each printk message delay some
milliseconds.

Setting the delay by proc/sysctl interface: /proc/sys/kernel/printk_delay

The value range from 0 - 10000, default value is 0

[akpm@linux-foundation.org: fix a few things]
Signed-off-by: Dave Young <hidave.darkstar@gmail.com>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-09-23 07:39:28 -07:00
..
gcov
powerpc: Enable GCOV
2009-08-20 10:29:28 +10:00
irq
Merge branch 'irq-threaded-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2009-09-11 13:21:31 -07:00
power
oom: move oom_killer_enable()/oom_killer_disable to where they belong
2009-09-22 07:17:38 -07:00
time
Merge branch 'timers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2009-09-18 09:15:24 -07:00
trace
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
2009-09-22 07:51:45 -07:00
.gitignore
…
acct.c
bsdacct: switch credentials for writing to the accounting file
2009-08-24 11:33:40 +10:00
async.c
async: Fix lack of boot-time console due to insufficient synchronization
2009-06-08 12:31:53 -07:00
audit_tree.c
Fix rule eviction order for AUDIT_DIR
2009-06-24 00:02:38 -04:00
audit_watch.c
Audit: clean up all op= output to include string quoting
2009-06-24 00:00:52 -04:00
audit.c
Fix rule eviction order for AUDIT_DIR
2009-06-24 00:02:38 -04:00
audit.h
Fix rule eviction order for AUDIT_DIR
2009-06-24 00:02:38 -04:00
auditfilter.c
Audit: clean up all op= output to include string quoting
2009-06-24 00:00:52 -04:00
auditsc.c
Fix rule eviction order for AUDIT_DIR
2009-06-24 00:02:38 -04:00
backtracetest.c
…
bounds.c
…
capability.c
[CVE-2009-0029] System call wrappers part 04
2009-01-14 14:15:19 +01:00
cgroup_debug.c
debug cgroup: remove unneeded cgroup_lock
2009-04-02 19:04:54 -07:00
cgroup_freezer.c
…
cgroup.c
const: mark remaining inode_operations as const
2009-09-22 07:17:24 -07:00
compat.c
signals: implement sys_rt_tgsigqueueinfo
2009-04-30 19:24:24 +02:00
configs.c
…
cpu.c
Merge branch 'x86-pat-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2009-09-15 09:19:38 -07:00
cpuset.c
cpuset,mm: update tasks' mems_allowed in time
2009-06-16 19:47:31 -07:00
cred-internals.h
…
cred.c
CRED: Allow put_cred() to cope with a NULL groups list
2009-09-15 09:10:57 +10:00
delayacct.c
headers: taskstats_kern.h trim
2009-09-18 09:48:52 -07:00
dma.c
…
exec_domain.c
Get rid of indirect include of fs_struct.h
2009-03-31 23:00:27 -04:00
exit.c
perf: Do the big rename: Performance Counters -> Performance Events
2009-09-21 14:28:04 +02:00
extable.c
Merge branch 'tracing-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2009-04-05 11:04:19 -07:00
fork.c
oom: move oom_adj value from task_struct to signal_struct
2009-09-22 07:17:39 -07:00
freezer.c
sched: fix nr_uninterruptible accounting of frozen tasks really
2009-07-18 14:19:53 +02:00
futex_compat.c
futex: Fix compat_futex to be same as futex for REQUEUE_PI
2009-08-10 15:41:12 +02:00
futex.c
Merge branch 'core-futexes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2009-09-11 13:16:22 -07:00
groups.c
groups: move code to kernel/groups.c
2009-06-16 19:47:48 -07:00
hrtimer.c
Merge branch 'timers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2009-09-18 09:15:24 -07:00
hung_task.c
softlockup: ensure the task has been switched out once
2009-02-11 11:04:16 +01:00
itimer.c
timers: split process wide cpu clocks/timers
2009-02-05 13:04:33 +01:00
kallsyms.c
kernel/kallsyms.c: replace deprecated __initcall with device_initcall and fix whitespace
2009-06-09 22:37:52 +02:00
Kconfig.freezer
…
Kconfig.hz
…
Kconfig.preempt
…
kexec.c
kexec: fix omitting offset in extended crashkernel syntax
2009-07-29 19:10:34 -07:00
kfifo.c
kfifo: Use "const" definitions
2009-09-19 13:13:17 -07:00
kgdb.c
sysrq, intel_fb: fix sysrq g collision
2009-05-15 07:56:24 -05:00
kmod.c
Merge branch 'tracing-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2009-09-11 13:24:03 -07:00
kprobes.c
Merge branch 'linus' into tracing/core
2009-08-11 14:19:09 +02:00
ksysfs.c
…
kthread.c
sched: Keep kthreads at default priority
2009-09-09 17:30:06 +02:00
latencytop.c
sched, latencytop: incorporate review feedback from Andrew Morton
2009-02-11 10:18:04 +01:00
lockdep_internals.h
lockdep: BFS cleanup
2009-07-24 10:53:29 +02:00
lockdep_proc.c
Merge commit 'v2.6.31-rc8' into core/locking
2009-08-31 18:05:25 +02:00
lockdep_states.h
lockdep: move state bit definitions around
2009-02-14 23:27:59 +01:00
lockdep.c
lockdep: Remove recursion stattistics
2009-08-29 13:22:36 +02:00
Makefile
Merge branch 'perfcounters-rename-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2009-09-21 09:15:07 -07:00
module.c
nommu: add support for Memory Protection Units (MPU)
2009-09-22 07:17:43 -07:00
mutex-debug.c
mutex: implement adaptive spinning
2009-01-14 18:09:02 +01:00
mutex-debug.h
mutex: implement adaptive spinning
2009-01-14 18:09:02 +01:00
mutex.c
Merge branch 'linus' into perfcounters/core
2009-06-11 17:55:42 +02:00
mutex.h
mutex: implement adaptive spinning
2009-01-14 18:09:02 +01:00
notifier.c
…
ns_cgroup.c
cgroups: relax ns_can_attach checks to allow attaching to grandchild cgroups
2009-04-02 19:04:53 -07:00
nsproxy.c
nsproxy: extract create_nsproxy()
2009-06-18 13:03:56 -07:00
panic.c
trivial: Correct print_tainted routine name in comment
2009-09-21 15:14:53 +02:00
params.c
module_param: allow 'bool' module_params to be bool, not just int.
2009-06-12 21:46:58 +09:30
perf_event.c
perf: Tidy up after the big rename
2009-09-21 14:34:11 +02:00
pid_namespace.c
pidns: rewrite copy_pid_ns()
2009-06-18 13:03:55 -07:00
pid.c
mm: also use alloc_large_system_hash() for the PID hash table
2009-09-22 07:17:38 -07:00
pm_qos_params.c
…
posix-cpu-timers.c
posix_cpu_timers_exit_group(): Do not use thread_group_cputimer()
2009-08-08 18:30:25 +02:00
posix-timers.c
time: Introduce CLOCK_REALTIME_COARSE
2009-08-21 21:43:46 +02:00
printk.c
printk: add printk_delay to make messages readable for some scenarios
2009-09-23 07:39:28 -07:00
profile.c
kernel/profile.c: Switch /proc/irq/prof_cpu_mask to seq_file
2009-09-20 20:15:40 +02:00
ptrace.c
Merge branch 'master' into next
2009-07-14 00:30:40 +10:00
rcupdate.c
rcu: Fix whitespace inconsistencies
2009-09-19 08:53:22 +02:00
rcutorture.c
rcu: Fix whitespace inconsistencies
2009-09-19 08:53:22 +02:00
rcutree_plugin.h
rcu: Fix whitespace inconsistencies
2009-09-19 08:53:22 +02:00
rcutree_trace.c
rcu: Fix whitespace inconsistencies
2009-09-19 08:53:22 +02:00
rcutree.c
rcu: Fix whitespace inconsistencies
2009-09-19 08:53:22 +02:00
rcutree.h
rcu: Fix whitespace inconsistencies
2009-09-19 08:53:22 +02:00
relay.c
Merge branch 'tracing-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2009-04-05 11:04:19 -07:00
res_counter.c
memcg: add interface to reset limits
2009-06-18 13:03:48 -07:00
resource.c
kernel/resource.c: fix sign extension in reserve_setup()
2009-06-30 18:56:00 -07:00
rtmutex_common.h
rt_mutex: add proxy lock routines
2009-04-06 11:14:02 +02:00
rtmutex-debug.c
…
rtmutex-debug.h
…
rtmutex-tester.c
…
rtmutex.c
rtmutex: Avoid deadlock in rt_mutex_start_proxy_lock()
2009-08-06 05:50:21 +02:00
rtmutex.h
…
rwsem.c
…
sched_clock.c
sched_clock: Make it NMI safe
2009-09-18 20:47:30 +02:00
sched_cpupri.c
sched: Add new prio to cpupri before removing old prio
2009-08-02 14:26:09 +02:00
sched_cpupri.h
cpumask: remove cpumask_t from core
2009-03-30 22:05:17 +10:30
sched_debug.c
sched: Add new wakeup preemption mode: WAKEUP_RUNNING
2009-09-17 10:17:25 +02:00
sched_fair.c
Merge branch 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2009-09-21 09:06:17 -07:00
sched_features.h
sched: Add new wakeup preemption mode: WAKEUP_RUNNING
2009-09-17 10:17:25 +02:00
sched_idletask.c
sched: Simplify sys_sched_rr_get_interval() system call
2009-09-21 09:53:55 +02:00
sched_rt.c
sched: Simplify sys_sched_rr_get_interval() system call
2009-09-21 09:53:55 +02:00
sched_stats.h
sched: remove unused fields from struct rq
2009-03-24 23:16:51 +01:00
sched.c
cpuidle: fix the menu governor to boost IO performance
2009-09-22 07:17:45 -07:00
seccomp.c
x86-64: seccomp: fix 32/64 syscall hole
2009-03-02 15:41:30 -08:00
semaphore.c
…
signal.c
do_sigaltstack: small cleanups
2009-08-01 11:18:56 -07:00
slow-work.c
slow-work: use round_jiffies() for thread pool's cull and OOM timers
2009-06-16 19:47:49 -07:00
smp.c
Merge branch 'x86/urgent' into x86/pat
2009-08-26 17:24:28 -07:00
softirq.c
softirq: add BLOCK_IOPOLL to softirq_to_name
2009-09-17 15:53:44 -04:00
softlockup.c
softlockup: decouple hung tasks check from softlockup detection
2009-01-16 14:06:04 +01:00
spinlock.c
locking: Allow arch-inlined spinlocks
2009-08-31 18:08:50 +02:00
srcu.c
…
stacktrace.c
…
stop_machine.c
cpumask: remove cpumask_t from core
2009-03-30 22:05:17 +10:30
sys_ni.c
perf: Do the big rename: Performance Counters -> Performance Events
2009-09-21 14:28:04 +02:00
sys.c
perf: Do the big rename: Performance Counters -> Performance Events
2009-09-21 14:28:04 +02:00
sysctl_check.c
net: add ARP notify option for devices
2009-02-01 01:04:33 -08:00
sysctl.c
printk: add printk_delay to make messages readable for some scenarios
2009-09-23 07:39:28 -07:00
taskstats.c
genetlink: make netns aware
2009-07-12 14:03:27 -07:00
test_kprobes.c
…
time.c
time: Prevent 32 bit overflow with set_normalized_timespec()
2009-09-15 10:17:30 +02:00
timeconst.pl
…
timer.c
perf: Do the big rename: Performance Counters -> Performance Events
2009-09-21 14:28:04 +02:00
tracepoint.c
trivial: fix typo "to to" in multiple files
2009-09-21 15:14:55 +02:00
tsacct.c
Fix fixpoint divide exception in acct_update_integrals
2009-03-09 08:13:35 -07:00
uid16.c
[CVE-2009-0029] System call wrappers part 19
2009-01-14 14:15:26 +01:00
up.c
smp_call_function_single(): be slightly less stupid, fix #2
2009-01-12 16:04:37 +01:00
user_namespace.c
Fix recursive lock in free_uid()/free_user_ns()
2009-02-27 16:26:21 -08:00
user.c
sched: delayed cleanup of user_struct
2009-06-15 21:30:23 -07:00
utsname_sysctl.c
proc_sysctl: use CONFIG_PROC_SYSCTL around ipc and utsname proc_handlers
2009-04-02 19:05:01 -07:00
utsname.c
utsns: extract creeate_uts_ns()
2009-06-18 13:03:55 -07:00
wait.c
locking, sched: Give waitqueue spinlocks their own lockdep classes
2009-08-10 14:43:09 +02:00
workqueue.c
Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2009-09-11 13:23:18 -07:00