Repository files (latest commit first)

Filename	Latest commit message	Latest commit date
Frederic Weisbecker 90a340ed53 rcu: Exit RCU extended QS on kernel preemption after irq/exception ... When an exception or an irq exits, and we are going to resume into interrupted kernel code, the low level architecture code calls preempt_schedule_irq() if there is a need to reschedule. If the interrupt/exception occured between a call to rcu_user_enter() (from syscall exit, exception exit, do_notify_resume exit, ...) and a real resume to userspace (iret,...), preempt_schedule_irq() can be called whereas RCU thinks we are in userspace. But preempt_schedule_irq() is going to run kernel code and may be some RCU read side critical section. We must exit the userspace extended quiescent state before we call it. To solve this, just call rcu_user_exit() in the beginning of preempt_schedule_irq(). Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Alessio Igor Bogani <abogani@kernel.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Avi Kivity <avi@redhat.com> Cc: Chris Metcalf <cmetcalf@tilera.com> Cc: Christoph Lameter <cl@linux.com> Cc: Geoff Levand <geoff@infradead.org> Cc: Gilad Ben Yossef <gilad@benyossef.com> Cc: Hakan Akkan <hakanakkan@gmail.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Josh Triplett <josh@joshtriplett.org> Cc: Kevin Hilman <khilman@ti.com> Cc: Max Krasnyansky <maxk@qualcomm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephen Hemminger <shemminger@vyatta.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Sven-Thorsten Dietrich <thebigcorporation@gmail.com> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org>		2012-09-26 15:47:09 +02:00
..
debug	kernel/debug: Make use of KGDB_REASON_NMI	2012-07-31 08:16:43 -05:00
events	perf/hwpb: Invoke __perf_event_disable() if interrupts are already disabled	2012-09-04 17:29:53 +02:00
gcov
irq	Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2012-08-03 10:56:44 -07:00
power	Revert "NMI watchdog: fix for lockup detector breakage on resume"	2012-08-08 20:49:45 +02:00
sched	rcu: Exit RCU extended QS on kernel preemption after irq/exception	2012-09-26 15:47:09 +02:00
time	Merge remote-tracking branch 'tip/core/rcu' into next.2012.09.25b	2012-09-25 10:03:56 -07:00
trace	tracing/syscalls: Fix perf syscall tracing when syscall_nr == -1	2012-08-17 15:19:46 -04:00
.gitignore
acct.c
async.c	[SCSI] async: make async_synchronize_full() flush all work regardless of domain	2012-07-20 09:07:37 +01:00
audit.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2012-08-01 10:26:23 -07:00
audit.h
audit_tree.c	audit: clean up refcounting in audit-tree	2012-08-15 12:55:22 +02:00
audit_watch.c	get rid of kern_path_parent()	2012-07-14 16:35:02 +04:00
auditfilter.c
auditsc.c	seccomp: remove duplicated failure logging	2012-04-14 11:13:20 +10:00
backtracetest.c
bounds.c
capability.c	userns: Teach inode_capable to understand inodes whose uids map to other namespaces.	2012-05-15 14:59:24 -07:00
cgroup.c	Merge branch 'for-3.6' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup	2012-07-24 17:47:44 -07:00
cgroup_freezer.c	cgroup: convert all non-memcg controllers to the new cftype interface	2012-04-01 12:09:55 -07:00
compat.c	new helper: sigsuspend()	2012-05-21 23:52:30 -04:00
configs.c
cpu.c	smpboot: Provide infrastructure for percpu hotplug threads	2012-08-13 17:01:07 +02:00
cpu_pm.c	kernel/cpu_pm.c: fix various typos	2012-05-31 17:49:27 -07:00
cpuset.c	cpusets: Remove/update outdated comments	2012-07-24 13:53:28 +02:00
crash_dump.c
cred.c	keys: kill task_struct->replacement_session_keyring	2012-05-23 22:11:41 -04:00
delayacct.c
dma.c	Remove all #inclusions of asm/system.h	2012-03-28 18:30:03 +01:00
elfcore.c
exec_domain.c
exit.c	posix_types.h: Cleanup stale __NFDBITS and related definitions	2012-07-26 13:36:43 -07:00
extable.c	extable: Skip sorting if sorted at build time.	2012-04-19 15:06:55 -07:00
fork.c	uprobes: Fix mmap_region()'s mm->mm_rb corruption if uprobe_mmap() fails	2012-08-21 11:48:12 +02:00
freezer.c	PM / Freezer: Remove references to TIF_FREEZE in comments	2012-03-04 23:08:54 +01:00
futex.c	futex: Forbid uaddr == uaddr2 in futex_wait_requeue_pi()	2012-07-24 16:02:57 +02:00
futex_compat.c	futex: Mark get_robust_list as deprecated	2012-03-29 11:37:17 +02:00
groups.c	userns: Convert in_group_p and in_egroup_p to use kgid_t	2012-05-03 03:29:33 -07:00
hrtimer.c	hrtimer: Update hrtimer base offsets each hrtimer_interrupt	2012-07-11 23:34:39 +02:00
hung_task.c	hung task debugging: Inject NMI when hung and going to panic	2012-04-25 12:39:25 +02:00
irq_work.c	irq_work: fix compile failure on tile from missing include	2012-04-13 13:15:16 -04:00
itimer.c	itimer: Use printk_once instead of WARN_ONCE	2012-04-10 11:00:30 +02:00
jump_label.c	static keys: Inline the static_key_enabled() function	2012-02-28 20:01:08 +01:00
kallsyms.c	vsprintf: fix %ps on non symbols when using kallsyms	2012-05-29 16:22:32 -07:00
kcmp.c	syscalls, x86: add __NR_kcmp syscall	2012-05-31 17:49:32 -07:00
Kconfig.freezer
Kconfig.hz
Kconfig.locks	locking/kconfig: Simplify INLINE_SPIN_UNLOCK usage	2012-03-23 13:18:57 +01:00
Kconfig.preempt	locking/kconfig: Simplify INLINE_SPIN_UNLOCK usage	2012-03-23 13:18:57 +01:00
kexec.c	kdump: append newline to the last lien of vmcoreinfo note	2012-07-30 17:25:20 -07:00
kfifo.c	[media] kernel:kfifo: export __kfifo_max_r symbol	2012-04-11 18:24:37 -03:00
kmod.c	kmod: avoid deadlock from recursive kmod call	2012-07-30 17:25:20 -07:00
kprobes.c	kprobes: return proper error code from register_kprobe()	2012-03-05 15:49:42 -08:00
ksysfs.c
kthread.c	kthread: Implement park/unpark facility	2012-08-13 17:01:06 +02:00
latencytop.c
lglock.c	brlocks/lglocks: turn into functions	2012-05-29 23:28:41 -04:00
lockdep.c	lockdep: Add CPU-idle/offline warning to lockdep-RCU splat	2012-02-21 09:06:06 -08:00
lockdep_internals.h
lockdep_proc.c
lockdep_states.h
Makefile	hotplug: Fix UP bug in smpboot hotplug code	2012-08-13 17:01:07 +02:00
module.c	Guard check in module loader against integer overflow	2012-05-23 22:28:53 +09:30
mutex-debug.c
mutex-debug.h
mutex.c	sched/rt: Use schedule_preempt_disabled()	2012-03-01 10:28:03 +01:00
mutex.h
notifier.c
nsproxy.c
padata.c	padata: Fix cpu hotplug	2012-03-29 19:52:46 +08:00
panic.c	panic: fix a possible deadlock in panic()	2012-07-30 17:25:13 -07:00
params.c	params: replace printk(KERN_<LVL>...) with pr_<lvl>(...)	2012-05-04 17:28:18 -07:00
pid.c	mm: add a low limit to alloc_large_system_hash	2012-05-24 00:28:21 -04:00
pid_namespace.c	pid-namespace: limit value of ns_last_pid to (0, max_pid)	2012-09-17 15:00:38 -07:00
posix-cpu-timers.c
posix-timers.c
printk.c	printk: Fix calculation of length used to discard records	2012-08-12 21:25:50 +03:00
profile.c
ptrace.c	userns: Convert ptrace, kill, set_priority permission checks to work with kuids and kgids	2012-05-03 03:28:51 -07:00
range.c
rcu.h	rcu: Allow nesting of rcu_idle_enter() and rcu_idle_exit()	2012-02-21 09:06:12 -08:00
rcupdate.c	rcu: Add PROVE_RCU_DELAY to provoke difficult races	2012-09-23 07:42:49 -07:00
rcutiny.c	rcu: Move TINY_RCU quiescent state out of extended quiescent state	2012-09-23 07:42:52 -07:00
rcutiny_plugin.h	rcu: Move TINY_PREEMPT_RCU away from raw_local_irq_save()	2012-09-23 07:42:51 -07:00
rcutorture.c	rcu: Prevent initialization race in rcutorture kthreads	2012-09-23 07:42:23 -07:00
rcutree.c	rcu: Switch task's syscall hooks on context switch	2012-09-26 15:47:02 +02:00
rcutree.h	rcu: Ignore userspace extended quiescent state by default	2012-09-26 15:47:01 +02:00
rcutree_plugin.h	rcu: Make RCU_FAST_NO_HZ handle adaptive ticks	2012-09-26 15:44:02 +02:00
rcutree_trace.c	Merge remote-tracking branch 'tip/smp/hotplug' into next.2012.09.25b	2012-09-25 10:01:45 -07:00
relay.c	splice: fix racy pipe->buffers uses	2012-06-13 21:16:42 +02:00
res_counter.c	rescounters: add res_counter_uncharge_until()	2012-05-29 16:22:27 -07:00
resource.c	resource: make sure requested range is included in the root range	2012-07-30 17:25:21 -07:00
rtmutex-debug.c
rtmutex-debug.h
rtmutex-tester.c
rtmutex.c
rtmutex.h
rtmutex_common.h
rwsem.c	Remove all #inclusions of asm/system.h	2012-03-28 18:30:03 +01:00
seccomp.c	seccomp: fix build warnings when there is no CONFIG_SECCOMP_FILTER	2012-04-18 12:24:52 +10:00
semaphore.c	semaphore: fix improper comment reference to mutex	2012-04-05 17:15:55 -07:00
signal.c	signal: make sure we don't get stopped with pending task_work	2012-07-22 23:57:54 +04:00
smp.c	smp: Remove ipi_call_lock[_irq]()/ipi_call_unlock[_irq]()	2012-06-05 17:27:14 +02:00
smpboot.c	hotplug: Fix UP bug in smpboot hotplug code	2012-08-13 17:01:07 +02:00
smpboot.h	smpboot: Provide infrastructure for percpu hotplug threads	2012-08-13 17:01:07 +02:00
softirq.c	softirq: Use hotplug thread infrastructure	2012-08-13 17:01:07 +02:00
spinlock.c	locking/kconfig: Simplify INLINE_SPIN_UNLOCK usage	2012-03-23 13:18:57 +01:00
srcu.c	rcu: Implement per-domain single-threaded call_srcu() state machine	2012-04-30 10:48:25 -07:00
stacktrace.c
stop_machine.c
sys.c	kernel/sys.c: avoid argv_free(NULL)	2012-07-30 17:25:13 -07:00
sys_ni.c	syscalls, x86: add __NR_kcmp syscall	2012-05-31 17:49:32 -07:00
sysctl.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2012-08-01 10:26:23 -07:00
sysctl_binary.c	mm: prepare for removal of obsolete /proc/sys/vm/nr_pdflush_threads	2012-07-31 18:42:40 -07:00
task_work.c	task_work: add a scheduling point in task_work_run()	2012-08-21 09:11:44 -07:00
taskstats.c	taskstats: check nla_reserve() return	2012-07-30 17:25:21 -07:00
test_kprobes.c
time.c	time: Remove bogus comments	2012-03-15 18:17:55 -07:00
timeconst.pl
timer.c	alpha: take a bunch of syscalls into osf_sys.c	2012-08-19 08:41:19 -07:00
tracepoint.c	static keys: Introduce 'struct static_key', static_key_true()/false() and static_key_slow_[inc|dec]()	2012-02-24 10:05:59 +01:00
tsacct.c
uid16.c	userns: Convert setting and getting uid and gid system calls to use kuid and kgid	2012-05-03 03:28:41 -07:00
up.c
user-return-notifier.c
user.c	userns: Silence silly gcc warning.	2012-05-19 15:44:40 -06:00
user_namespace.c	userns: Store uid and gid values in struct cred with kuid_t and kgid_t types	2012-05-03 03:28:38 -07:00
utsname.c	userns: Use cred->user_ns instead of cred->user->user_ns	2012-04-07 16:55:51 -07:00
utsname_sysctl.c
wait.c
watchdog.c	watchdog: Use hotplug thread infrastructure	2012-08-13 17:01:07 +02:00
workqueue.c	workqueue: reimplement work_on_cpu() using system_wq	2012-09-19 10:13:12 -07:00
workqueue_sched.h