KAMEZAWA Hiroyuki d2997b1042 hibernation: freeze swap at hibernation ... When taking a memory snapshot in hibernate_snapshot(), all (directly called) memory allocations use GFP_ATOMIC. Hence swap misusage during hibernation never occurs. But from a pessimistic point of view, there is no guarantee that no page allcation has __GFP_WAIT. It is better to have a global indication "we enter hibernation, don't use swap!". This patch tries to freeze new-swap-allocation during hibernation. (All user processes are frozenm so swapin is not a concern). This way, no updates will happen to swap_map[] between hibernate_snapshot() and save_image(). Swap is thawed when swsusp_free() is called. We can be assured that swap corruption will not occur. Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: "Rafael J. Wysocki" <rjw@sisk.pl> Cc: Hugh Dickins <hughd@google.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Ondrej Zary <linux@rainbow-software.org> Cc: Balbir Singh <balbir@in.ibm.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2010-08-09 20:45:04 -07:00
..
debug	Merge branch 'timers-timekeeping-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2010-08-06 13:18:29 -07:00
gcov
irq	irq: Add new IRQ flag IRQF_NO_SUSPEND	2010-07-29 13:24:57 +02:00
power	hibernation: freeze swap at hibernation	2010-08-09 20:45:04 -07:00
time	Merge branch 'timers-timekeeping-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2010-08-06 13:18:29 -07:00
trace	Merge branch 'bkl/core' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing	2010-08-07 17:06:54 -07:00
.gitignore
acct.c	Merge branch 'next' into for-linus	2010-05-18 08:57:00 +10:00
async.c	async: use workqueue for worker pool	2010-07-14 11:29:46 +02:00
audit.c	drop_monitor: convert some kfree_skb call sites to consume_skb	2010-07-20 13:28:05 -07:00
audit.h
audit_tree.c
audit_watch.c
auditfilter.c
auditsc.c
backtracetest.c
bounds.c
capability.c
cgroup.c	cgroupfs: create /sys/fs/cgroup to mount cgroupfs on	2010-08-05 13:53:35 -07:00
cgroup_freezer.c
compat.c	cpumask: fix compat getaffinity	2010-05-19 11:48:18 -07:00
configs.c
cpu.c	sched: adjust when cpu_active and cpuset configurations are updated during cpu on/offlining	2010-06-08 21:40:36 +02:00
cpuset.c	Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2010-08-06 09:39:22 -07:00
cred.c	CRED: Fix get_task_cred() and task_state() to not resurrect dead credentials	2010-07-29 15:16:17 -07:00
delayacct.c
dma.c
early_res.c	kmemleak: Add support for NO_BOOTMEM configurations	2010-07-19 11:54:15 +01:00
elfcore.c
exec_domain.c	sys_personality: change sys_personality() to accept "unsigned int" instead of u_long	2010-06-04 15:21:45 -07:00
exit.c	proc: turn signal_struct->count into "int nr_threads"	2010-05-27 09:12:47 -07:00
extable.c
fork.c	oom: badness heuristic rewrite	2010-08-09 20:45:02 -07:00
freezer.c
futex.c	futex: futex_find_get_task remove credentails check	2010-06-30 15:43:44 -07:00
futex_compat.c
groups.c
hrtimer.c	Merge branch 'timers-timekeeping-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2010-08-06 13:18:29 -07:00
hung_task.c
hw_breakpoint.c	Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2010-08-06 09:30:52 -07:00
itimer.c
kallsyms.c	kdb: core for kgdb back end (2 of 2)	2010-05-20 21:04:21 -05:00
Kconfig.freezer
Kconfig.hz
Kconfig.locks
Kconfig.preempt
kexec.c	kexec: fix Oops in crash_shrink_memory()	2010-06-29 15:29:31 -07:00
kfifo.c
kmod.c	call_usermodehelper: UMH_WAIT_EXEC ignores kernel_thread() failure	2010-05-27 09:12:45 -07:00
kprobes.c
ksysfs.c	sysfs: add struct file* to bin_attr callbacks	2010-05-21 09:37:31 -07:00
kthread.c	kthread: implement kthread_data()	2010-06-29 10:07:09 +02:00
latencytop.c
lockdep.c	sched_clock: Add local_clock() API and improve documentation	2010-06-09 10:34:49 +02:00
lockdep_internals.h
lockdep_proc.c
lockdep_states.h
Makefile	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq	2010-08-07 12:42:58 -07:00
module.c	module: cleanup comments, remove noinline	2010-08-05 12:59:13 +09:30
mutex-debug.c
mutex-debug.h
mutex.c	mutex: Fix optimistic spinning vs. BKL	2010-05-19 08:18:44 +02:00
mutex.h
notifier.c
ns_cgroup.c
nsproxy.c
padata.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6	2010-08-04 15:23:14 -07:00
panic.c	panic: call console_verbose() in panic	2010-05-27 09:12:53 -07:00
params.c
perf_event.c	Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2010-08-06 09:39:22 -07:00
pid.c	pids: increase pid_max based on num_possible_cpus	2010-05-27 09:12:51 -07:00
pid_namespace.c
pm_qos_params.c	pm_qos: Get rid of the allocation in pm_qos_add_request()	2010-07-19 02:00:34 +02:00
posix-cpu-timers.c	sched: Fix the racy usage of thread_group_cputimer() in fastpath_timer_check()	2010-06-18 10:46:57 +02:00
posix-timers.c	posix_timer: Move copy_to_user(created_timer_id) down in timer_create()	2010-07-23 15:08:12 +02:00
printk.c	printk: fix delayed messages from CPU hotplug events	2010-08-05 13:25:59 +01:00
profile.c	numa: in-kernel profiling: use cpu_to_mem() for per cpu allocations	2010-05-27 09:12:57 -07:00
ptrace.c	ptrace: PTRACE_GETFDPIC: fix the unsafe usage of child->mm	2010-05-27 09:12:44 -07:00
range.c
rcupdate.c	tree/tiny rcu: Add debug RCU head objects	2010-06-14 16:37:26 -07:00
rcutiny.c	tree/tiny rcu: Add debug RCU head objects	2010-06-14 16:37:26 -07:00
rcutiny_plugin.h
rcutorture.c	sched_clock: Add local_clock() API and improve documentation	2010-06-09 10:34:49 +02:00
rcutree.c	tree/tiny rcu: Add debug RCU head objects	2010-06-14 16:37:26 -07:00
rcutree.h
rcutree_plugin.h
rcutree_trace.c
relay.c	kernel/: convert cpu notifier to return encapsulate errno value	2010-05-27 09:12:48 -07:00
res_counter.c
resource.c
rtmutex-debug.c
rtmutex-debug.h
rtmutex-tester.c
rtmutex.c
rtmutex.h
rtmutex_common.h
rwsem.c
sched.c	Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2010-08-06 09:39:22 -07:00
sched_clock.c	sched_clock: Add local_clock() API and improve documentation	2010-06-09 10:34:49 +02:00
sched_cpupri.c	sched: No need for bootmem special cases	2010-07-17 12:06:22 +02:00
sched_cpupri.h	sched: No need for bootmem special cases	2010-07-17 12:06:22 +02:00
sched_debug.c	sched: Use correct macro to display sched_child_runs_first in /proc/sched_debug	2010-07-21 21:46:12 +02:00
sched_fair.c	Merge branch 'linus' into sched/core	2010-07-21 21:45:08 +02:00
sched_features.h
sched_idletask.c
sched_rt.c	sched: task_tick_rt: Remove the obsolete ->signal != NULL check	2010-06-18 10:46:56 +02:00
sched_stats.h	sched: Remove the obsolete exit_state/signal hacks	2010-06-18 10:46:56 +02:00
seccomp.c
semaphore.c
signal.c	CRED: Fix RCU warning due to previous patch fixing __task_cred()'s checks	2010-08-04 11:17:10 -07:00
smp.c	kernel/: convert cpu notifier to return encapsulate errno value	2010-05-27 09:12:48 -07:00
softirq.c	kernel/: fix BUG_ON checks for cpu notifier callbacks direct call	2010-06-04 15:21:45 -07:00
spinlock.c
srcu.c
stacktrace.c
stop_machine.c	sched: Make sure timers have migrated before killing the migration_thread	2010-05-31 08:37:44 +02:00
sys.c	kmod: add init function to usermodehelper	2010-05-27 09:12:44 -07:00
sys_ni.c
sysctl.c	oom: move sysctl declarations to oom.h	2010-08-09 20:44:57 -07:00
sysctl_binary.c	sysctl: don't use own implementation of hex_to_bin()	2010-05-25 08:07:05 -07:00
sysctl_check.c
taskstats.c
test_kprobes.c
time.c	time: Kill off CONFIG_GENERIC_TIME	2010-07-27 12:40:54 +02:00
timeconst.pl
timer.c	Merge branch 'timers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2010-08-06 13:12:36 -07:00
tracepoint.c	tracing: Let tracepoints have data passed to tracepoint callbacks	2010-05-14 09:50:34 -04:00
tsacct.c
uid16.c
up.c
user-return-notifier.c
user.c
user_namespace.c	user_ns: Introduce user_nsmap_uid and user_ns_map_gid.	2010-06-16 14:55:34 -07:00
utsname.c
utsname_sysctl.c
wait.c
watchdog.c	kernel/watchdog: Initialize 'result'	2010-07-07 08:46:42 +02:00
workqueue.c	workqueue: workqueue_cpu_callback() should be cpu_notifier instead of hotcpu_notifier	2010-08-09 11:50:34 +02:00
workqueue_sched.h	workqueue: implement concurrency managed dynamic worker pool	2010-06-29 10:07:14 +02:00