Nick Piggin
70ff05554f
Fix PREEMPT_RCU without HOTPLUG_CPU ...
PREEMPT_RCU without HOTPLUG_CPU is broken. The rcu_online_cpu is called
to initially populate rcu_cpu_online_map with all online CPUs when the
hotplug event handler is installed, and also to populate the map with
CPUs as they come online. The former case is meant to happen with and
without HOTPLUG_CPU, but without HOTPLUG_CPU, the rcu_offline_cpu
function is no-oped -- while it still gets called, it does not set the
rcu CPU map.
With a blank RCU CPU map, grace periods get to tick by completely
oblivious to active RCU read side critical sections. This results in
free-before-grace bugs.
Fix is obvious once the problem is known. (Also, change __devinit to
__cpuinit so the function gets thrown away on !HOTPLUG_CPU kernels).
Signed-off-by: Nick Piggin <npiggin@suse.de>
Reported-and-tested-by: Alexey Dobriyan <adobriyan@gmail.com>
Acked-by: Ingo Molnar <mingo@elte.hu>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
[ Nick is my personal hero of the day - Linus ]
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-07-10 11:13:44 -07:00
genirq: reenable a nobody cared disabled irq when a new driver arrives
2008-05-02 13:40:34 +02:00
Merge branches 'release', 'acpica', 'bugzilla-10224', 'bugzilla-9772', 'bugzilla-9916', 'ec', 'eeepc', 'idle', 'misc', 'pm-legacy', 'sysfs-links-2.6.26', 'thermal', 'thinkpad' and 'video' into release
2008-04-30 13:58:00 -04:00
clocksource: allow read access to available/current_clocksource
2008-05-03 18:11:48 +02:00
Update kernel/.gitignore with new auto-generated files
2008-02-09 23:27:01 -08:00
bsd_acct: using task_struct->tgid is not right in pid-namespaces
2008-03-24 19:22:20 -07:00
[PATCH] remove useless argument type in audit_filter_user()
2008-06-24 23:36:35 -04:00
[PATCH 1/2] audit: move extern declarations to audit.h
2008-04-28 06:28:04 -04:00
[PATCH] list_for_each_rcu must die: audit
2008-05-17 03:30:23 -04:00
[PATCH] remove useless argument type in audit_filter_user()
2008-06-24 23:36:35 -04:00
[PATCH] new predicate - AUDIT_FILETYPE
2008-04-28 06:28:37 -04:00
Add kbuild.h that contains common definitions for kbuild users
2008-04-29 08:06:29 -07:00
security: filesystem capabilities: fix fragile setuid fixup code
2008-07-04 10:40:08 -07:00
cgroups: remove node_ prefix_from ns subsystem
2008-05-24 09:56:14 -07:00
CGroup API files: move "releasable" to cgroup_debug subsystem
2008-04-29 08:06:09 -07:00
ntp: support for TAI
2008-05-01 08:03:59 -07:00
kernel: use non-racy method for proc entries creation
2008-04-29 08:06:22 -07:00
kernel: replace remaining __FUNCTION__ occurrences
2008-04-30 08:29:54 -07:00
Merge branch 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2008-06-20 12:37:13 -07:00
kernel: use non-racy method for proc entries creation
2008-04-29 08:06:22 -07:00
signals: fix sigqueue_free() vs __exit_signal() race
2008-05-24 09:56:10 -07:00
[PATCH] dup_fd() fixes, part 1
2008-05-16 17:22:26 -04:00
futexes: fix fault handling in futex_lock_pi
2008-06-23 13:31:15 +02:00
futex_compat __user annotation
2008-03-30 14:18:41 -07:00
hrtimer: prevent migration for raising softirq
2008-07-03 11:36:48 -07:00
ITIMER_REAL: convert to use struct pid
2008-02-08 09:22:29 -08:00
kernel: use non-racy method for proc entries creation
2008-04-29 08:06:22 -07:00
rcu: move PREEMPT_RCU config option back under PREEMPT
2008-03-10 18:01:20 -07:00
kexec: make extended crashkernel= syntax less confusing
2008-05-01 08:04:00 -07:00
kgdb: sparse fix
2008-06-24 10:52:55 -05:00
[PATCH] split linux/file.h
2008-05-01 13:08:16 -04:00
kernel/kprobes.c: Made kprobe_blacklist static.
2008-07-10 10:13:51 -07:00
Deprecate find_task_by_pid()
2008-04-30 08:29:48 -07:00
kernel: use non-racy method for proc entries creation
2008-04-29 08:06:22 -07:00
Subject: lockdep: include all lock classes in all_lock_classes
2008-02-25 23:03:02 +01:00
kernel: use non-racy method for proc entries creation
2008-04-29 08:06:22 -07:00
sched: add optional support for CONFIG_HAVE_UNSTABLE_SCHED_CLOCK
2008-05-05 23:56:18 +02:00
make marker_debug static
2008-04-30 08:29:49 -07:00
modules: proper cleanup of kobject without CONFIG_SYSFS
2008-05-23 13:09:33 +10:00
kernel: remove fastcall in kernel/*
2008-02-08 09:22:31 -08:00
kernel: remove fastcall in kernel/*
2008-02-08 09:22:31 -08:00
ipc: re-enable msgmni automatic recomputing msgmni if set to negative
2008-04-29 08:06:13 -07:00
cgroups: kernel/ns_cgroup.c should #include <linux/nsproxy.h>
2008-04-29 08:06:07 -07:00
ipc: sysvsem: refuse clone(CLONE_SYSVSEM|CLONE_NEWIPC)
2008-04-29 08:06:14 -07:00
Taint kernel after WARN_ON(condition)
2008-04-29 08:05:59 -07:00
Add new string functions strict_strto* and convert kernel params to use them
2008-02-08 09:22:41 -08:00
pids: introduce change_pid() helper
2008-04-30 08:29:48 -07:00
pidns: make pid->level and pid_ns->level unsigned
2008-04-30 08:29:49 -07:00
remove div_long_long_rem
2008-05-01 08:03:58 -07:00
signals: join send_sigqueue() with send_group_sigqueue()
2008-04-30 08:29:36 -07:00
kernel/printk.c: Made printk_recursion_bug_msg static.
2008-07-08 18:10:34 -07:00
kernel: use non-racy method for proc entries creation
2008-04-29 08:06:22 -07:00
make generic sys_ptrace unconditional
2008-05-01 10:21:54 -07:00
rcu: fix hotplug vs rcu race
2008-07-01 09:27:17 +02:00
rcupdate: fix comment
2008-02-13 16:21:18 -08:00
Fix PREEMPT_RCU without HOTPLUG_CPU
2008-07-10 11:13:44 -07:00
kernel: explicitly include required header files under kernel/
2008-04-29 08:06:04 -07:00
splice: fix sendfile() issue with relay
2008-05-28 14:49:27 +02:00
memcgroup: add the max_usage member on the res_counter
2008-04-29 08:06:10 -07:00
kernel: use non-racy method for proc entries creation
2008-04-29 08:06:22 -07:00
Don't operate with pid_t in rtmutex tester
2008-02-08 09:22:41 -08:00
hrtimer: more hrtimer_init_sleeper() fallout.
2008-02-13 15:45:36 +01:00
Don't operate with pid_t in rtmutex tester
2008-02-08 09:22:41 -08:00
sched: fix divide error when trying to configure rt_period to zero
2008-07-01 08:23:24 +02:00
sched: fix sched_clock_cpu()
2008-05-29 11:29:19 +02:00
revert ("sched: fair-group: SMP-nice for group scheduling")
2008-05-29 11:28:57 +02:00
sched: stop wake_affine from causing serious imbalance
2008-05-29 11:29:20 +02:00
sched: /debug/sched_features
2008-04-19 19:45:00 +02:00
sched: make rt_sched_class, idle_sched_class static
2008-05-05 23:56:17 +02:00
sched: rt: dont stop the period timer when there are tasks wanting to run
2008-06-20 11:00:19 +02:00
sched, delay accounting: fix incorrect delay time when constantly waiting on runqueue
2008-06-19 14:15:28 +02:00
Revert "semaphore: fix"
2008-05-10 20:43:22 -07:00
posix timers: discard SI_TIMER signals on exec
2008-05-26 10:37:07 -07:00
Fix cpu hotplug problem in softirq code
2008-05-01 08:03:58 -07:00
softlockup: print a module list on being stuck
2008-07-05 08:51:24 +02:00
stop_machine: make stop_machine_run more virtualization friendly
2008-05-23 13:09:34 +10:00
sys_prctl(): fix return of uninitialized value
2008-05-24 09:56:13 -07:00
[PATCH] avoid multiplication overflows and signedness issues for max_fds
2008-05-16 17:22:52 -04:00
constify tables in kernel/sysctl_check.c
2008-02-08 09:22:31 -08:00
Use find_task_by_vpid in taskstats
2008-04-30 08:29:48 -07:00
Make constants in kernel/timeconst.h fixed 64 bits
2008-05-02 16:18:42 -07:00
Make constants in kernel/timeconst.h fixed 64 bits
2008-05-02 16:18:42 -07:00
debugobjects: add timer specific object debugging code
2008-04-30 08:29:53 -07:00
asmlinkage_protect replaces prevent_tail_call
2008-04-10 17:28:26 -07:00
alloc_uid: cleanup
2008-04-30 08:29:53 -07:00
eCryptfs: make key module subsystem respect namespaces
2008-04-29 08:06:07 -07:00
kernel: explicitly include required header files under kernel/
2008-04-29 08:06:04 -07:00
kernel: remove fastcall in kernel/*
2008-02-08 09:22:31 -08:00
Christoph has moved
2008-07-04 10:40:04 -07:00
70ff05554f