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0ac3d136b2
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Paul E. McKenney 0ac3d136b2 rcu: add callback-queue information to rcudata output 
This commit adds an indication of the state of the callback queue using
a string of four characters following the "ql=" integer queue length.
The first character is "N" if there are callbacks that have been
queued that are not yet ready to be handled by the next grace period, or
"." otherwise.  The second character is "R" if there are callbacks queued
that are ready to be handled by the next grace period, or "." otherwise.
The third character is "W" if there are callbacks waiting for the current
grace period, or "." otherwise.  Finally, the fourth character is "D"
if there are callbacks that have been handled by a prior grace period
and are waiting to be invoked, or ".".

Note that callbacks that are in the process of being invoked are
not shown.  These callbacks would have been removed from the rcu_data
structure's list by rcu_do_batch() prior to being executed.  (These
callbacks are also not reflected in the "ql=" total, FWIW.)

Also, document the new callback-queue trace information.

Signed-off-by: Paul E. McKenney <paul.mckenney@linaro.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
2011-05-05 23:16:56 -07:00
..
debug Fix common misspellings 2011-03-31 11:26:23 -03:00
gcov Merge branch 'trivial' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6 2011-03-20 18:14:55 -07:00
irq genirq: Fix typo CONFIG_GENIRC_IRQ_SHOW_LEVEL 2011-05-02 21:16:37 +02:00
power PM: Fix error code paths executed after failing syscore_suspend() 2011-04-18 23:58:59 +02:00
time posix clocks: Replace mutex with reader/writer semaphore 2011-04-18 10:39:38 +02:00
trace Merge branch 'tip/perf/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-trace into perf/urgent 2011-04-27 10:31:29 +02:00
.gitignore
acct.c
async.c
audit_tree.c Fix common misspellings 2011-03-31 11:26:23 -03:00
audit_watch.c kill path_lookup() 2011-03-14 09:15:23 -04:00
audit.c netlink: kill loginuid/sessionid/sid members from struct netlink_skb_parms 2011-03-03 10:55:40 -08:00
audit.h
auditfilter.c netlink: kill loginuid/sessionid/sid members from struct netlink_skb_parms 2011-03-03 10:55:40 -08:00
auditsc.c Fix common misspellings 2011-03-31 11:26:23 -03:00
backtracetest.c
bounds.c memcg: remove direct page_cgroup-to-page pointer 2011-03-23 19:46:28 -07:00
capability.c userns: make has_capability* into real functions 2011-03-23 19:47:06 -07:00
cgroup_freezer.c
cgroup.c Fix common misspellings 2011-03-31 11:26:23 -03:00
compat.c posix-timers: Introduce a syscall for clock tuning. 2011-02-02 15:28:19 +01:00
configs.c
cpu.c Fix common misspellings 2011-03-31 11:26:23 -03:00
cpuset.c cpuset: hold callback_mutex in cpuset_post_clone() 2011-03-23 19:46:35 -07:00
crash_dump.c crash_dump: export is_kdump_kernel to modules, consolidate elfcorehdr_addr, setup_elfcorehdr and saved_max_pfn 2011-03-23 19:47:19 -07:00
cred.c userns: security: make capabilities relative to the user namespace 2011-03-23 19:47:02 -07:00
delayacct.c
dma.c
elfcore.c
exec_domain.c
exit.c Fix common misspellings 2011-03-31 11:26:23 -03:00
extable.c
fork.c Merge branch 'for-2.6.39/core' of git://git.kernel.dk/linux-2.6-block 2011-03-24 10:16:26 -07:00
freezer.c Freezer: Fix a race during freezing of TASK_STOPPED tasks 2010-12-24 15:02:40 +01:00
futex_compat.c userns: user namespaces: convert several capable() calls 2011-03-23 19:47:08 -07:00
futex.c futex: Set FLAGS_HAS_TIMEOUT during futex_wait restart setup 2011-04-15 16:34:32 +02:00
groups.c userns: user namespaces: convert several capable() calls 2011-03-23 19:47:08 -07:00
hrtimer.c hrtimer: Initialize CLOCK_ID to HRTIMER_BASE table statically 2011-04-29 10:57:11 +02:00
hung_task.c
hw_breakpoint.c perf: Dynamic pmu types 2010-12-16 11:36:43 +01:00
irq_work.c irq_work: Use per cpu atomics instead of regular atomics 2010-12-18 15:54:48 +01:00
itimer.c
jump_label.c
kallsyms.c Merge branch 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2011-03-25 17:52:22 -07:00
Kconfig.freezer
Kconfig.hz
Kconfig.locks
Kconfig.preempt
kexec.c PM: Add missing syscore_suspend() and syscore_resume() calls 2011-04-20 00:36:11 +02:00
kfifo.c
kmod.c
kprobes.c Merge branch 'for-2.6.38' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu 2011-01-07 17:02:58 -08:00
ksysfs.c
kthread.c Fix common misspellings 2011-03-31 11:26:23 -03:00
latencytop.c Fix common misspellings 2011-03-31 11:26:23 -03:00
lockdep_internals.h
lockdep_proc.c lockdep: Remove unused 'factor' variable from lockdep_stats_show() 2011-03-23 13:54:47 +01:00
lockdep_states.h
lockdep.c Fix common misspellings 2011-03-31 11:26:23 -03:00
Makefile crash_dump: export is_kdump_kernel to modules, consolidate elfcorehdr_addr, setup_elfcorehdr and saved_max_pfn 2011-03-23 19:47:19 -07:00
module.c Fix common misspellings 2011-03-31 11:26:23 -03:00
mutex-debug.c
mutex-debug.h
mutex.c Fix common misspellings 2011-03-31 11:26:23 -03:00
mutex.h
notifier.c
ns_cgroup.c
nsproxy.c userns: user namespaces: convert several capable() calls 2011-03-23 19:47:08 -07:00
padata.c Fix common misspellings 2011-03-31 11:26:23 -03:00
panic.c move x86 specific oops=panic to generic code 2011-03-22 17:44:11 -07:00
params.c Fix common misspellings 2011-03-31 11:26:23 -03:00
perf_event.c perf_event: Fix cgrp event scheduling bug in perf_enable_on_exec() 2011-04-11 11:07:55 +02:00
pid_namespace.c pidns: call pid_ns_prepare_proc() from create_pid_namespace() 2011-03-23 19:46:58 -07:00
pid.c next_pidmap: fix overflow condition 2011-04-18 10:35:30 -07:00
pm_qos_params.c PM QoS: Make pm_qos settings readable 2011-03-15 00:43:18 +01:00
posix-cpu-timers.c Fix common misspellings 2011-03-31 11:26:23 -03:00
posix-timers.c Fix common misspellings 2011-03-31 11:26:23 -03:00
printk.c printk: allow setting DEFAULT_MESSAGE_LEVEL via Kconfig 2011-03-22 17:44:13 -07:00
profile.c
ptrace.c userns: allow ptrace from non-init user namespaces 2011-03-23 19:47:05 -07:00
range.c
rcupdate.c rcu: add comment saying why DEBUG_OBJECTS_RCU_HEAD depends on PREEMPT. 2011-03-04 08:05:41 -08:00
rcutiny_plugin.h rcu: call __rcu_read_unlock() in exit_rcu for tiny RCU 2011-03-04 08:05:08 -08:00
rcutiny.c rcu: avoid pointless blocked-task warnings 2011-01-14 04:58:08 -08:00
rcutorture.c rcu: eliminate unused boosting statistics 2011-05-05 23:16:55 -07:00
rcutree_plugin.h rcu: Add boosting to TREE_PREEMPT_RCU tracing 2011-05-05 23:16:55 -07:00
rcutree_trace.c rcu: add callback-queue information to rcudata output 2011-05-05 23:16:56 -07:00
rcutree.c rcu: put per-CPU kthread at non-RT priority during CPU hotplug operations 2011-05-05 23:16:55 -07:00
rcutree.h rcu: Add boosting to TREE_PREEMPT_RCU tracing 2011-05-05 23:16:55 -07:00
relay.c
res_counter.c memcg: res_counter_read_u64(): fix potential races on 32-bit machines 2011-03-23 19:46:22 -07:00
resource.c resources: add arch hook for preventing allocation in reserved areas 2010-12-17 10:01:09 -08:00
rtmutex_common.h rtmutex: Simplify PI algorithm and make highest prio task get lock 2011-01-27 21:13:51 -05:00
rtmutex-debug.c rtmutex: Simplify PI algorithm and make highest prio task get lock 2011-01-27 21:13:51 -05:00
rtmutex-debug.h
rtmutex-tester.c rtmutex: tester: Remove the remaining BKL leftovers 2011-02-22 22:07:22 +01:00
rtmutex.c rtmutex: Simplify PI algorithm and make highest prio task get lock 2011-01-27 21:13:51 -05:00
rtmutex.h
rwsem.c
sched_autogroup.c Fix common misspellings 2011-03-31 11:26:23 -03:00
sched_autogroup.h sched, autogroup: Stop going ahead if autogroup is disabled 2011-02-23 11:33:59 +01:00
sched_clock.c sched: Add some clock info to sched_debug 2010-11-23 10:29:08 +01:00
sched_cpupri.c
sched_cpupri.h
sched_debug.c sched: Use a buddy to implement yield_task_fair() 2011-02-03 14:20:33 +01:00
sched_fair.c sched: Fix erroneous all_pinned logic 2011-04-11 11:08:54 +02:00
sched_features.h sched: Rewrite tg_shares_up) 2010-11-18 13:27:46 +01:00
sched_idletask.c sched, doc: Update sched-design-CFS.txt 2011-03-23 14:09:41 +01:00
sched_rt.c Fix common misspellings 2011-03-31 11:26:23 -03:00
sched_stats.h
sched_stoptask.c sched, doc: Update sched-design-CFS.txt 2011-03-23 14:09:41 +01:00
sched.c block: let io_schedule() flush the plug inline 2011-04-16 13:27:55 +02:00
seccomp.c
semaphore.c
signal.c signal.c: fix erroneous syscall kernel-doc 2011-04-08 11:05:24 -07:00
smp.c smp: move smp setup functions to kernel/smp.c 2011-03-22 17:44:11 -07:00
softirq.c rcu: move TREE_RCU from softirq to kthread 2011-05-05 23:16:54 -07:00
spinlock.c
srcu.c rcu: demote SRCU_SYNCHRONIZE_DELAY from kernel-parameter status 2011-01-14 04:56:49 -08:00
stacktrace.c
stop_machine.c kthread: use kthread_create_on_node() 2011-03-22 17:44:01 -07:00
sys_ni.c vfs: Add open by file handle support 2011-03-15 02:21:44 -04:00
sys.c userns: user namespaces: convert all capable checks in kernel/sys.c 2011-03-23 19:47:06 -07:00
sysctl_binary.c open-style analog of vfs_path_lookup() 2011-03-14 09:15:28 -04:00
sysctl_check.c sysctl_check: drop dead code 2011-03-23 19:46:51 -07:00
sysctl.c sysctl: restrict write access to dmesg_restrict 2011-03-23 19:46:54 -07:00
taskstats.c taskstats: use appropriate printk priority level 2011-03-23 19:47:14 -07:00
test_kprobes.c
time.c Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2011-03-15 18:53:35 -07:00
timeconst.pl
timer.c Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2011-03-15 18:53:35 -07:00
tracepoint.c tracepoints: Fix section alignment using pointer array 2011-02-03 09:28:46 -05:00
tsacct.c
uid16.c userns: user namespaces: convert several capable() calls 2011-03-23 19:47:08 -07:00
up.c
user_namespace.c user_ns: improve the user_ns on-the-slab packaging 2011-01-13 08:03:18 -08:00
user-return-notifier.c Fix common misspellings 2011-03-31 11:26:23 -03:00
user.c userns: add a user_namespace as creator/owner of uts_namespace 2011-03-23 19:46:59 -07:00
utsname_sysctl.c
utsname.c userns: allow sethostname in a container 2011-03-23 19:47:03 -07:00
wait.c Fix common misspellings 2011-03-31 11:26:23 -03:00
watchdog.c kernel/watchdog.c: disable nmi perf event in the error path of enabling watchdog 2011-04-28 11:28:21 -07:00
workqueue_sched.h
workqueue.c workqueue: fix deadlock in worker_maybe_bind_and_lock() 2011-04-29 18:08:37 +02:00