Jason Wessel 56fb709329 kgdb: fix SMP NMI kgdb_handle_exception exit race ...

Fix the problem of protecting the kgdb handle_exception exit
which had an NMI race condition, while trying to restore
normal system operation.

There was a small window after the master processor sets cpu_in_debug
to zero but before it has set kgdb_active to zero where a
non-master processor in an SMP system could receive an NMI and
re-enter the kgdb_wait() loop.

As long as the master processor sets the cpu_in_debug before sending
the cpu roundup the cpu_in_debug variable can also be used to guard
against the race condition.

The kgdb_wait() function no longer needs to check
kgdb_active because it is done in the arch specific code
and handled along with the nmi traps at the low level.
This also allows kgdb_wait() to exit correctly if it was
entered for some unknown reason due to a spurious NMI that
could not be handled by the arch specific code.

Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

2008-04-17 20:05:43 +02:00

..

irq

genirq: do not leave interupts enabled on free_irq

2008-02-19 10:43:58 +01:00

power

Merge branches 'release' and 'doc' into release

2008-03-13 01:59:53 -04:00

time

kgdb: clocksource watchdog

2008-04-17 20:05:38 +02:00

.gitignore

Update kernel/.gitignore with new auto-generated files

2008-02-09 23:27:01 -08:00

acct.c

bsd_acct: using task_struct->tgid is not right in pid-namespaces

2008-03-24 19:22:20 -07:00

audit_tree.c

Introduce path_put()

2008-02-14 21:13:33 -08:00

audit.c

audit: silence two kerneldoc warnings in kernel/audit.c

2008-03-28 14:45:21 -07:00

audit.h

[PATCH] audit: watching subtrees

2007-10-21 02:37:45 -04:00

auditfilter.c

Introduce path_put()

2008-02-14 21:13:33 -08:00

auditsc.c

[PATCH] Audit: Fix the format type for size_t variables

2008-03-01 07:16:06 -05:00

backtracetest.c

x86: add a simple backtrace test module

2008-01-30 13:33:08 +01:00

capability.c

Add 64-bit capability support to the kernel

2008-02-05 09:44:20 -08:00

cgroup_debug.c

Task Control Groups: simple task cgroup debug info subsystem

2007-10-19 11:53:36 -07:00

cgroup.c

cgroups: include hierarchy ids in /proc/<pid>/cgroup

2008-04-11 08:06:43 -07:00

compat.c

hrtimer: don't modify restart_block->fn in restart functions

2008-02-10 10:48:03 +01:00

configs.c

use simple_read_from_buffer in kernel/

2007-05-09 12:30:49 -07:00

cpu.c

cpu: fix section mismatch warnings for enable_nonboot_cpus

2008-02-08 09:22:41 -08:00

cpuset.c

cpusets: fix obsolete comment

2008-03-05 17:53:33 -08:00

delayacct.c

Add scaled time to taskstats based process accounting

2007-10-18 14:37:28 -07:00

dma.c

whitespace fixes: DMA channel allocator

2007-10-18 14:37:24 -07:00

exec_domain.c

whitespace fixes: execution domains

2007-10-18 14:37:26 -07:00

exit.c

asmlinkage_protect replaces prevent_tail_call

2008-04-10 17:28:26 -07:00

extable.c

module: Don't report discarded init pages as kernel text.

2008-01-29 17:13:18 +11:00

fork.c

memcgroup: fix spurious EBUSY on memory cgroup removal

2008-03-28 14:45:21 -07:00

futex_compat.c

futex_compat __user annotation

2008-03-30 14:18:41 -07:00

futex.c

NULL noise: fs/*, mm/*, kernel/*

2008-03-30 14:18:41 -07:00

hrtimer.c

hrtimer: catch expired CLOCK_REALTIME timers early

2008-02-14 22:08:30 +01:00

itimer.c

ITIMER_REAL: convert to use struct pid

2008-02-08 09:22:29 -08:00

kallsyms.c

remove support for un-needed _extratext section

2008-02-06 10:41:01 -08:00

Kconfig.hz

sched: high-res preemption tick

2008-01-25 21:08:29 +01:00

Kconfig.preempt

rcu: move PREEMPT_RCU config option back under PREEMPT

2008-03-10 18:01:20 -07:00

kexec.c

vmcoreinfo: add "VMCOREINFO_" to all the call for vmcoreinfo_append_str()

2008-02-07 08:42:25 -08:00

kfifo.c

is_power_of_2: kernel/kfifo.c

2007-07-16 09:05:50 -07:00

kgdb.c

kgdb: fix SMP NMI kgdb_handle_exception exit race

2008-04-17 20:05:43 +02:00

kmod.c

Dont touch fs_struct in usermodehelper

2008-02-14 21:13:32 -08:00

kprobes.c

kprobes: fix a null pointer bug in register_kretprobe()

2008-03-04 16:35:19 -08:00

ksysfs.c

Kobject: convert remaining kobject_unregister() to kobject_put()

2008-01-24 20:40:40 -08:00

kthread.c

sched: fix, always create kernel threads with normal priority

2008-01-25 21:08:33 +01:00

latencytop.c

sched: latencytop support

2008-01-25 21:08:34 +01:00

lockdep_internals.h

[PATCH] lockdep: more chains

2006-12-07 08:39:43 -08:00

lockdep_proc.c

lockdep: Avoid /proc/lockdep & lock_stat infinite output

2007-10-11 22:11:11 +02:00

lockdep.c

Subject: lockdep: include all lock classes in all_lock_classes

2008-02-25 23:03:02 +01:00

Makefile

kgdb: core

2008-04-17 20:05:37 +02:00

marker.c

markers: use synchronize_sched()

2008-04-02 15:28:19 -07:00

module.c

modules: warn about suspicious return values from module's ->init() hook

2008-03-10 18:01:20 -07:00

mutex-debug.c

kernel: remove fastcall in kernel/*

2008-02-08 09:22:31 -08:00

mutex-debug.h

[PATCH] lockdep: better lock debugging

2006-07-03 15:27:01 -07:00

mutex.c

kernel: remove fastcall in kernel/*

2008-02-08 09:22:31 -08:00

mutex.h

[PATCH] lockdep: prove mutex locking correctness

2006-07-03 15:27:04 -07:00

notifier.c

kernel/notifier.c should #include <linux/reboot.h>

2008-02-06 10:41:02 -08:00

ns_cgroup.c

cgroups: implement namespace tracking subsystem

2007-10-19 11:53:37 -07:00

nsproxy.c

namespaces: move the IPC namespace under IPC_NS option

2008-02-08 09:22:23 -08:00

panic.c

ACPI: Taint kernel on ACPI table override (format corrected)

2008-02-06 22:07:51 -05:00

params.c

Add new string functions strict_strto* and convert kernel params to use them

2008-02-08 09:22:41 -08:00

pid_namespace.c

namespaces: cleanup the code managed with PID_NS option

2008-02-08 09:22:23 -08:00

pid.c

kernel: remove fastcall in kernel/*

2008-02-08 09:22:31 -08:00

pm_qos_params.c

pm qos infrastructure and interface

2008-02-05 09:44:22 -08:00

posix-cpu-timers.c

Use find_task_by_vpid in posix timers

2008-02-08 09:22:41 -08:00

posix-timers.c

hrtimer: check relative timeouts for overflow

2008-02-14 22:08:30 +01:00

printk.c

Fix locking bug in "acquire_console_semaphore_for_printk()"

2008-04-15 13:09:54 -07:00

profile.c

Nuke a duplicate include from profile.c

2008-02-08 09:22:34 -08:00

ptrace.c

ptrace_check_attach: remove unneeded ->signal != NULL check

2008-02-08 09:22:26 -08:00

rcuclassic.c

Preempt-RCU: implementation

2008-01-25 21:08:24 +01:00

rcupdate.c

rcupdate: fix comment

2008-02-13 16:21:18 -08:00

rcupreempt_trace.c

Preempt-RCU: implementation

2008-01-25 21:08:24 +01:00

rcupreempt.c

rcupreempt: remove never-migrates assumption from rcu_process_callbacks()

2008-02-29 20:21:13 +01:00

rcutorture.c

cpu-hotplug: replace lock_cpu_hotplug() with get_online_cpus()

2008-01-25 21:08:02 +01:00

relay.c

relay: set an spd_release() hook for splice

2008-03-26 12:04:09 +01:00

res_counter.c

Memory Resource Controller use strstrip while parsing arguments

2008-03-04 16:35:09 -08:00

resource.c

[POWERPC] Add arch-specific walk_memory_remove() for 64-bit powerpc

2008-02-08 19:52:48 +11:00

rtmutex_common.h

Don't operate with pid_t in rtmutex tester

2008-02-08 09:22:41 -08:00

rtmutex-debug.c

Don't operate with pid_t in rtmutex tester

2008-02-08 09:22:41 -08:00

rtmutex-debug.h

[PATCH] lockdep: better lock debugging

2006-07-03 15:27:01 -07:00

rtmutex-tester.c

Driver core: change sysdev classes to use dynamic kobject names

2008-01-24 20:40:40 -08:00

rtmutex.c

hrtimer: more hrtimer_init_sleeper() fallout.

2008-02-13 15:45:36 +01:00

rtmutex.h

[PATCH] lockdep: better lock debugging

2006-07-03 15:27:01 -07:00

rwsem.c

sched: mark rwsem functions as __sched for wchan/profiling

2007-12-18 15:21:13 +01:00

sched_debug.c

sched: improve affine wakeups

2008-03-19 04:27:53 +01:00

sched_fair.c

revert "sched: fix fair sleepers"

2008-04-14 14:26:23 +02:00

sched_idletask.c

sched: high-res preemption tick

2008-01-25 21:08:29 +01:00

sched_rt.c

sched: balance RT task resched only on runqueue

2008-03-07 16:43:00 +01:00

sched_stats.h

sched: clean up kernel/sched_stat.h

2007-11-28 15:52:56 +01:00

sched.c

NOHZ: reevaluate idle sleep length after add_timer_on()

2008-03-26 08:28:55 +01:00

seccomp.c

make seccomp zerocost in schedule

2007-07-16 09:05:50 -07:00

signal.c

freezer vs stopped or traced

2008-03-04 07:59:54 -08:00

softirq.c

rcu: add support for dynamic ticks and preempt rcu

2008-02-29 18:46:50 +01:00

softlockup.c

softlockup: fix task state setting

2008-02-29 18:46:53 +01:00

spinlock.c

spinlock: lockbreak cleanup

2008-01-30 13:31:20 +01:00

srcu.c

make srcu_readers_active() static

2008-02-06 10:41:02 -08:00

stacktrace.c

[PATCH] lockdep: stacktrace subsystem, core

2006-07-03 15:27:02 -07:00

stop_machine.c

stopmachine: semaphore to mutex

2008-02-06 10:41:08 -08:00

sys_ni.c

timerfd: new timerfd API

2008-02-05 09:44:07 -08:00

sys.c

Pidns: make full use of xxx_vnr() calls

2008-02-08 09:22:29 -08:00

sysctl_check.c

constify tables in kernel/sysctl_check.c

2008-02-08 09:22:31 -08:00

sysctl.c

sched: revert load_balance_monitor() changes

2008-03-04 17:54:06 +01:00

taskstats.c

kernel/taskstats.c: fix bogus nlmsg_free()

2007-11-14 18:45:44 -08:00

test_kprobes.c

kprobes: kretprobe user entry-handler

2008-02-06 10:41:11 -08:00

time.c

avoid overflows in kernel/time.c

2008-02-08 09:22:39 -08:00

timeconst.pl

timeconst.pl: correct reversal of USEC_TO_HZ and HZ_TO_USEC

2008-02-12 14:29:26 -08:00

timer.c

NOHZ: reevaluate idle sleep length after add_timer_on()

2008-03-26 08:28:55 +01:00

tsacct.c

Add scaled time to taskstats based process accounting

2007-10-18 14:37:28 -07:00

uid16.c

asmlinkage_protect replaces prevent_tail_call

2008-04-10 17:28:26 -07:00

user_namespace.c

namespaces: cleanup the code managed with the USER_NS option

2008-02-08 09:22:23 -08:00

user.c

sched: rt-group: make rt groups scheduling configurable

2008-02-13 15:45:40 +01:00

utsname_sysctl.c

Isolate the UTS namespace's domainname and hostname back

2007-11-29 09:24:53 -08:00

utsname.c

Fix UTS corruption during clone(CLONE_NEWUTS)

2007-09-19 11:24:17 -07:00

wait.c

kernel: remove fastcall in kernel/*

2008-02-08 09:22:31 -08:00

workqueue.c

workqueue: make delayed_work_timer_fn() static

2008-02-08 09:22:37 -08:00