John Stultz
4873fa070a
timekeeping: Fix leapsecond triggered load spike issue ...
The timekeeping code misses an update of the hrtimer subsystem after a
leap second happened. Due to that timers based on CLOCK_REALTIME are
either expiring a second early or late depending on whether a leap
second has been inserted or deleted until an operation is initiated
which causes that update. Unless the update happens by some other
means this discrepancy between the timekeeping and the hrtimer data
stays forever and timers are expired either early or late.
The reported immediate workaround - $ data -s "`date`" - is causing a
call to clock_was_set() which updates the hrtimer data structures.
See: http://www.sheeri.com/content/mysql-and-leap-second-high-cpu-and-fix
Add the missing clock_was_set() call to update_wall_time() in case of
a leap second event. The actual update is deferred to softirq context
as the necessary smp function call cannot be invoked from hard
interrupt context.
Signed-off-by: John Stultz <johnstul@us.ibm.com>
Reported-by: Jan Engelhardt <jengelh@inai.de>
Reviewed-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Prarit Bhargava <prarit@redhat.com>
Cc: stable@vger.kernel.org
Link: http://lkml.kernel.org/r/1341960205-56738-3-git-send-email-johnstul@us.ibm.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2012-07-11 23:34:37 +02:00
KGDB/KDB regression fixes
2012-04-04 17:26:08 -07:00
perf: Use css_tryget() to avoid propping up css refcount
2012-06-18 11:45:57 +02:00
gcov: disable CONSTRUCTORS for UML
2011-07-26 16:49:45 -07:00
Merge branches 'irq-urgent-for-linus' and 'smp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2012-06-04 11:36:51 -07:00
PM / Hibernate: Use get_gendisk to verify partition if resume_file is integer format
2012-05-18 20:44:59 +02:00
Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2012-06-08 14:59:29 -07:00
timekeeping: Fix leapsecond triggered load spike issue
2012-07-11 23:34:37 +02:00
Merge branch 'for-linus' of git://git.kernel.dk/linux-block
2012-07-03 15:45:10 -07:00
Merge branch 'for-linus2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2012-01-08 12:19:57 -08:00
kernel/async: remove redundant declaration.
2012-01-13 09:32:18 +10:30
constify path argument of audit_log_d_path()
2012-03-20 21:29:40 -04:00
audit: remove AUDIT_SETUP_CONTEXT as it isn't used
2012-01-17 16:16:57 -05:00
audit_tree,rcu: Convert call_rcu(__put_tree) to kfree_rcu()
2011-07-20 14:10:11 -07:00
audit: allow interfield comparison in audit rules
2012-01-17 16:17:01 -05:00
seccomp: remove duplicated failure logging
2012-04-14 11:13:20 +10:00
userns: Teach inode_capable to understand inodes whose uids map to other namespaces.
2012-05-15 14:59:24 -07:00
cgroup: fix cgroup hierarchy umount race
2012-07-07 16:08:18 -07:00
cgroup: convert all non-memcg controllers to the new cftype interface
2012-04-01 12:09:55 -07:00
new helper: sigsuspend()
2012-05-21 23:52:30 -04:00
kernel/configs.c: include MODULE_*() when CONFIG_IKCONFIG_PROC=n
2011-07-25 20:57:15 -07:00
kernel/cpu.c: document clear_tasks_mm_cpumask()
2012-05-31 17:49:30 -07:00
kernel/cpu_pm.c: fix various typos
2012-05-31 17:49:27 -07:00
Merge branch 'for-3.5' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup
2012-05-22 17:40:19 -07:00
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
keys: kill task_struct->replacement_session_keyring
2012-05-23 22:11:41 -04:00
Remove all #inclusions of asm/system.h
2012-03-28 18:30:03 +01:00
pidns: find_new_reaper() can no longer switch to init_pid_ns.child_reaper
2012-06-20 14:39:36 -07:00
extable: Skip sorting if sorted at build time.
2012-04-19 15:06:55 -07:00
Revert "mm: correctly synchronize rss-counters at exit/exec"
2012-06-07 17:54:07 -07:00
PM / Freezer: Remove references to TIF_FREEZE in comments
2012-03-04 23:08:54 +01:00
futex: Mark get_robust_list as deprecated
2012-03-29 11:37:17 +02:00
futex: Mark get_robust_list as deprecated
2012-03-29 11:37:17 +02:00
userns: Convert in_group_p and in_egroup_p to use kgid_t
2012-05-03 03:29:33 -07:00
hrtimer: Provide clock_was_set_delayed()
2012-07-11 23:34:37 +02:00
hung task debugging: Inject NMI when hung and going to panic
2012-04-25 12:39:25 +02:00
irq_work: fix compile failure on tile from missing include
2012-04-13 13:15:16 -04:00
itimer: Use printk_once instead of WARN_ONCE
2012-04-10 11:00:30 +02:00
static keys: Inline the static_key_enabled() function
2012-02-28 20:01:08 +01:00
vsprintf: fix %ps on non symbols when using kallsyms
2012-05-29 16:22:32 -07:00
syscalls, x86: add __NR_kcmp syscall
2012-05-31 17:49:32 -07:00
locking/kconfig: Simplify INLINE_SPIN_UNLOCK usage
2012-03-23 13:18:57 +01:00
locking/kconfig: Simplify INLINE_SPIN_UNLOCK usage
2012-03-23 13:18:57 +01:00
Merge branch 'akpm' (Andrew's patch-bomb)
2012-03-28 17:19:28 -07:00
[media] kernel:kfifo: export __kfifo_max_r symbol
2012-04-11 18:24:37 -03:00
kmod.c: fix kernel-doc warning
2012-05-31 17:49:28 -07:00
kprobes: return proper error code from register_kprobe()
2012-03-05 15:49:42 -08:00
kernel: ksysfs.c is implicitly using stat.h
2011-10-31 09:20:13 -04:00
freezer: kill unused set_freezable_with_signal()
2011-11-23 09:28:17 -08:00
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
brlocks/lglocks: turn into functions
2012-05-29 23:28:41 -04:00
lockdep: Add CPU-idle/offline warning to lockdep-RCU splat
2012-02-21 09:06:06 -08:00
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2012-06-01 10:34:35 -07:00
Guard check in module loader against integer overflow
2012-05-23 22:28:53 +09:30
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
sched/rt: Use schedule_preempt_disabled()
2012-03-01 10:28:03 +01:00
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
padata: Fix cpu hotplug
2012-03-29 19:52:46 +08:00
kdump: Execute kmsg_dump(KMSG_DUMP_PANIC) after smp_send_stop()
2012-05-18 14:02:10 +02:00
params: replace printk(KERN_<LVL>...) with pr_<lvl>(...)
2012-05-04 17:28:18 -07:00
mm: add a low limit to alloc_large_system_hash
2012-05-24 00:28:21 -04:00
pidns: guarantee that the pidns init will be the last pidns process reaped
2012-06-20 14:39:36 -07:00
[S390] cputime: add sparse checking and cleanup
2011-12-15 14:56:19 +01:00
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
printk.c: fix kernel-doc warnings
2012-06-30 15:56:40 -07:00
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
userns: Convert ptrace, kill, set_priority permission checks to work with kuids and kgids
2012-05-03 03:28:51 -07:00
range: fix bogus misuse of module.h to get printk()
2011-10-31 09:20:11 -04:00
rcu: Allow nesting of rcu_idle_enter() and rcu_idle_exit()
2012-02-21 09:06:12 -08:00
rcu: Make exit_rcu() more precise and consolidate
2012-05-02 14:48:27 -07:00
rcu: Add RCU_NONIDLE() for idle-loop RCU read-side critical sections
2012-02-21 09:06:13 -08:00
rcu: Make exit_rcu() more precise and consolidate
2012-05-02 14:48:27 -07:00
rcu: Add rcutorture test for call_srcu()
2012-04-30 10:48:26 -07:00
rcu: Stop rcu_do_batch() from multiplexing the "count" variable
2012-06-25 12:35:25 -07:00
rcu: Move RCU_FAST_NO_HZ per-CPU variables to rcu_dynticks structure
2012-06-06 20:43:28 -07:00
rcu: Precompute RCU_FAST_NO_HZ timer offsets
2012-06-06 20:43:28 -07:00
rcu: Make rcu_barrier() less disruptive
2012-05-09 14:27:54 -07:00
splice: fix racy pipe->buffers uses
2012-06-13 21:16:42 +02:00
rescounters: add res_counter_uncharge_until()
2012-05-29 16:22:27 -07:00
kernel/resource.c: correct the comment of allocate_resource()
2012-05-31 17:49:26 -07:00
lockdep, rtmutex, bug: Show taint flags on error
2011-12-06 08:16:49 +01:00
rtmutex-tester: convert sysdev_class to a regular subsystem
2011-12-14 14:54:22 -08:00
Revert "rcu: Permit rt_mutex_unlock() with irqs disabled"
2011-12-11 10:33:18 -08:00
Remove all #inclusions of asm/system.h
2012-03-28 18:30:03 +01:00
seccomp: fix build warnings when there is no CONFIG_SECCOMP_FILTER
2012-04-18 12:24:52 +10:00
semaphore: fix improper comment reference to mutex
2012-04-05 17:15:55 -07:00
new helper: signal_delivered()
2012-06-01 12:58:52 -04:00
smp: Implement kick_all_cpus_sync()
2012-05-08 12:35:06 +02:00
smpboot, idle: Fix comment mismatch over idle_threads_init()
2012-05-24 22:58:08 +02:00
smp: Fix idle_thread_init() inline stub
2012-05-04 12:52:25 +02:00
Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2012-03-20 10:32:09 -07:00
locking/kconfig: Simplify INLINE_SPIN_UNLOCK usage
2012-03-23 13:18:57 +01:00
rcu: Implement per-domain single-threaded call_srcu() state machine
2012-04-30 10:48:25 -07:00
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
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
c/r: prctl: Move PR_GET_TID_ADDRESS to a proper place
2012-06-20 14:39:36 -07:00
syscalls, x86: add __NR_kcmp syscall
2012-05-31 17:49:32 -07:00
sysctl: fix write access to dmesg_restrict/kptr_restrict
2012-04-05 14:51:43 +10:00
binary_sysctl(): fix memory leak
2011-12-20 10:25:04 -08:00
task_work_add: generic process-context callbacks
2012-05-23 22:09:21 -04:00
Make TASKSTATS require root access
2011-09-19 17:04:37 -07:00
time: Remove bogus comments
2012-03-15 18:17:55 -07:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
2012-05-23 17:42:39 -07:00
static keys: Introduce 'struct static_key', static_key_true()/false() and static_key_slow_[inc|dec]()
2012-02-24 10:05:59 +01:00
[S390] cputime: add sparse checking and cleanup
2011-12-15 14:56:19 +01:00
userns: Convert setting and getting uid and gid system calls to use kuid and kgid
2012-05-03 03:28:41 -07:00
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
userns: Silence silly gcc warning.
2012-05-19 15:44:40 -06:00
userns: Store uid and gid values in struct cred with kuid_t and kgid_t types
2012-05-03 03:28:38 -07:00
userns: Use cred->user_ns instead of cred->user->user_ns
2012-04-07 16:55:51 -07:00
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
lockdep/waitqueues: Add better annotation
2011-12-21 10:07:39 +01:00
watchdog: Quiet down the boot messages
2012-06-14 12:20:50 +02:00
lockdep: fix oops in processing workqueue
2012-05-15 08:08:31 -07:00
4873fa070a