Paul E. McKenney
90a4d2c010
rcu: make treercu safe for suspend and resume ...
Impact: fix kernel warnings [and potential crash] during suspend+resume
Kudos to both Dhaval Giani and Jens Axboe for finding a bug in treercu
that causes warnings after suspend-resume cycles in Dhaval's case and
during stress tests in Jens's case. It would also probably cause failures
if heavily stressed. The solution, ironically enough, is to revert to
rcupreempt's code for initializing the dynticks state. And the patch
even results in smaller code -- so what was I thinking???
This is 2.6.29 material, given that people really do suspend and resume
Linux these days. ;-)
Reported-by: Dhaval Giani <dhaval@linux.vnet.ibm.com>
Reported-by: Jens Axboe <jens.axboe@oracle.com>
Tested-by: Dhaval Giani <dhaval@linux.vnet.ibm.com>
Tested-by: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-01-05 10:12:33 +01:00
Merge branch 'cpus4096-for-linus-3' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2009-01-03 12:04:39 -08:00
cpumask: convert rest of files in kernel/
2009-01-01 10:12:28 +10:30
Merge branch 'cpus4096-for-linus-3' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2009-01-03 12:04:39 -08:00
Merge branch 'cpus4096-for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2009-01-02 11:44:09 -08:00
CRED: Wrap task credential accesses in the core kernel
2008-11-14 10:39:12 +11:00
[PATCH] fix broken timestamps in AVC generated by kernel threads
2008-12-09 02:27:41 -05:00
Fix inotify watch removal/umount races
2008-11-15 12:26:44 -08:00
Fix inotify watch removal/umount races
2008-11-15 12:26:44 -08:00
Merge branch 'next' into for-linus
2008-12-25 11:40:09 +11:00
backtrace: replace timer with tasklet + completions
2008-06-27 18:09:16 +02:00
CRED: Inaugurate COW credentials
2008-11-14 10:39:23 +11:00
Merge branch 'next' into for-linus
2008-12-25 11:40:09 +11:00
cgroups: fix probable race with put_css_set[_taskexit] and find_css_set
2008-10-20 08:52:38 -07:00
freezer_cg: disable writing freezer.state of root cgroup
2008-11-12 17:17:16 -08:00
cpumask: convert kernel/compat.c
2009-01-01 10:12:24 +10:30
kernel/configs.c: remove useless comments
2008-10-20 08:52:34 -07:00
cpumask: convert kernel/cpu.c
2009-01-01 10:12:28 +10:30
cpumask: change cpumask_scnprintf, cpumask_parse_user, cpulist_parse, and cpulist_scnprintf to take pointers.
2008-12-13 21:20:25 +10:30
CRED: Inaugurate COW credentials
2008-11-14 10:39:23 +11:00
User namespaces: set of cleanups (v2)
2008-11-24 18:57:41 -05:00
schedstat: consolidate per-task cpu runtime stats
2008-12-18 13:54:01 +01:00
dma-coherent: export dma_[alloc|release]_from_coherent methods
2008-08-22 08:34:53 +02:00
kernel/dma.c: remove a CVS keyword
2008-10-16 11:21:30 -07:00
proc: move /proc/execdomains to kernel/exec_domain.c
2008-10-23 14:30:41 +04:00
Merge branch 'for-2.6.29' of git://git.kernel.dk/linux-2.6-block
2008-12-30 17:20:05 -08:00
Merge branch 'core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2008-12-30 16:10:19 -08:00
aio: make the lookup_ioctx() lockless
2008-12-29 08:29:50 +01:00
freezer_cg: use thaw_process() in unfreeze_cgroup()
2008-10-30 11:38:45 -07:00
Merge branch 'core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2008-12-30 16:10:19 -08:00
CRED: Use RCU to access another task's creds and to release a task's own creds
2008-11-14 10:39:19 +11:00
Merge branch 'irq-fixes-for-linus-4' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2008-12-31 09:00:59 -08:00
timers: fix itimer/many thread hang
2008-09-14 16:25:35 +02:00
allow stripping of generated symbols under CONFIG_KALLSYMS_ALL
2008-12-19 22:47:10 +01:00
container freezer: implement freezer cgroup subsystem
2008-10-20 08:52:34 -07:00
sched: fix SCHED_HRTICK dependency
2008-07-28 14:37:38 +02:00
rcu: provide RCU options on non-preempt architectures too
2008-12-25 09:31:28 +01:00
cpumask: prepare for iterators to only go to nr_cpu_ids/nr_cpumask_bits.: core
2009-01-01 10:12:15 +10:30
kgdb: call touch_softlockup_watchdog on resume
2008-10-06 13:50:59 -05:00
CRED: Inaugurate COW credentials
2008-11-14 10:39:23 +11:00
kernel/kprobes.c: don't pad kretprobe_table_locks[] on uniprocessor builds
2008-11-12 17:17:17 -08:00
profiling: dynamically enable readprofile at runtime
2008-10-16 11:21:31 -07:00
tracepoints: add DECLARE_TRACE() and DEFINE_TRACE()
2008-11-16 09:01:36 +01:00
KSYM_SYMBOL_LEN fixes
2008-12-10 08:01:54 -08:00
Merge branch 'core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2008-12-30 16:10:19 -08:00
lockdep: build fix
2008-08-13 12:55:10 +02:00
lockstat: contend with points
2008-10-20 15:43:10 +02:00
Merge branch 'core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2008-12-30 16:10:19 -08:00
markers/tracpoints: fix non-modular build
2008-11-16 09:52:03 +01:00
tracing/function-graph-tracer: introduce __notrace_funcgraph to filter special functions
2008-12-08 15:11:44 +01:00
mutex: __used is needed for function referenced only from inline asm
2008-11-24 10:00:28 +01:00
Merge commit 'v2.6.28-rc6' into core/debug
2008-11-26 08:22:50 +01:00
cgroup_clone: use pid of newly created task for new cgroup
2008-07-25 10:53:37 -07:00
User namespaces: set of cleanups (v2)
2008-11-24 18:57:41 -05:00
Merge branch 'core/debug' into core/core
2008-12-25 13:53:11 +01:00
Fix compile warning in kernel/params.c
2008-10-23 12:09:00 -07:00
pidns: remove now unused find_pid function.
2008-07-25 10:53:45 -07:00
pid_ns: (BUG 11391) change ->child_reaper when init->group_leader exits
2008-09-02 19:21:38 -07:00
pm_qos_requirement might sleep
2008-09-02 19:21:40 -07:00
Merge commit 'v2.6.28' into core/core
2008-12-25 13:51:46 +01:00
Merge branches 'timers/clocksource', 'timers/hpet', 'timers/hrtimers', 'timers/nohz', 'timers/ntp', 'timers/posixtimers' and 'timers/rtc' into timers/core
2008-12-25 18:02:25 +01:00
printk: fix discarding message when recursion_bug
2008-12-19 22:52:47 +01:00
cpumask: convert kernel/profile.c
2009-01-01 10:12:27 +10:30
Merge branch 'tracing-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2008-12-28 12:21:10 -08:00
cpumask: convert RCU implementations, fix
2009-01-03 18:59:25 +01:00
rcupdate: fix bug of rcu_barrier*()
2008-10-21 15:59:53 +02:00
cpumask: convert RCU implementations
2009-01-01 10:12:26 +10:30
"Tree RCU": scalable classic RCU implementation
2008-12-18 21:56:04 +01:00
cpumask: convert RCU implementations
2009-01-01 10:12:26 +10:30
rcu: make treercu safe for suspend and resume
2009-01-05 10:12:33 +01:00
"Tree RCU": scalable classic RCU implementation
2008-12-18 21:56:04 +01:00
relayfs: fix infinite loop with splice()
2008-12-10 08:01:52 -08:00
cgroup files: convert res_counter_write() to be a cgroups write_string() handler
2008-07-25 10:53:36 -07:00
resources: skip sanity check of busy resources
2008-12-16 23:30:49 +01:00
sysdev: Pass the attribute to the low level sysdev show/store function
2008-07-21 21:55:02 -07:00
hrtimer: convert kernel/* to the new hrtimer apis
2008-09-05 21:35:13 -07:00
Merge branch 'cpus4096-for-linus-3' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2009-01-03 12:04:39 -08:00
Revert "sched_clock: prevent scd->clock from moving backwards"
2008-12-14 16:23:17 -08:00
sched: convert struct cpupri_vec cpumask_var_t.
2008-11-24 17:52:22 +01:00
sched: convert struct cpupri_vec cpumask_var_t.
2008-11-24 17:52:22 +01:00
sched: add uid information to sched_debug for CONFIG_USER_SCHED
2008-12-01 20:39:50 +01:00
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-cpumask into merge-rr-cpumask
2009-01-03 18:53:31 +01:00
sched: backward looking buddy
2008-11-05 10:30:14 +01:00
sched: add CONFIG_SMP consistency
2008-10-22 10:01:52 +02:00
sched: put back some stack hog changes that were undone in kernel/sched.c
2009-01-03 19:00:09 +01:00
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-cpumask into merge-rr-cpumask
2009-01-03 18:53:31 +01:00
semaphore: __down_common: use signal_pending_state()
2008-08-05 14:33:47 -07:00
Merge branch 'tracing-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2008-12-28 12:21:10 -08:00
cpumask: prepare for iterators to only go to nr_cpu_ids/nr_cpumask_bits.: core
2009-01-01 10:12:15 +10:30
Merge branch 'cpus4096-for-linus-3' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2009-01-03 12:04:39 -08:00
cpumask: convert rest of files in kernel/
2009-01-01 10:12:28 +10:30
lockdep: spin_lock_nest_lock(), checkpatch fixes
2008-08-13 13:56:51 +02:00
stacktrace: provide save_stack_trace_tsk() weak alias
2008-12-25 11:44:43 +01:00
cpumask: convert rest of files in kernel/
2009-01-01 10:12:28 +10:30
Merge branch 'core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2008-12-30 16:10:19 -08:00
reintroduce accept4
2008-11-19 18:49:57 -08:00
Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6
2008-12-28 20:19:47 -08:00
[XFS] remove restricted chown parameter from xfs linux
2008-10-30 18:30:09 +11:00
cpumask: convert rest of files in kernel/
2009-01-01 10:12:28 +10:30
select: add a timespec_add_safe() function
2008-09-05 21:34:57 -07:00
[PATCH] idle cputime accounting
2008-12-31 15:11:46 +01:00
markers/tracpoints: fix non-modular build
2008-11-16 09:52:03 +01:00
CRED: Use RCU to access another task's creds and to release a task's own creds
2008-11-14 10:39:19 +11:00
CRED: Wrap current->cred and a few other accessors
2008-11-14 10:39:18 +11:00
Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2008-12-28 12:27:58 -08:00
User namespaces: set of cleanups (v2)
2008-11-24 18:57:41 -05:00
removed unused #include <linux/version.h>'s
2008-08-23 12:14:12 -07:00
sysctl: simplify ->strategy
2008-10-16 11:21:47 -07:00
wait: kill is_sync_wait()
2008-10-16 11:21:31 -07:00
cpumask: convert kernel/workqueue.c
2009-01-01 10:12:25 +10:30
90a4d2c010