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Rafael J. Wysocki 91e7c75ba9 PM: Allow drivers to allocate memory from .prepare() callbacks safely 
If device drivers allocate substantial amounts of memory (above 1 MB)
in their hibernate .freeze() callbacks (or in their legacy suspend
callbcks during hibernation), the subsequent creation of hibernate
image may fail due to the lack of memory.  This is the case, because
the drivers' .freeze() callbacks are executed after the hibernate
memory preallocation has been carried out and the preallocated amount
of memory may be too small to cover the new driver allocations.
Unfortunately, the drivers' .prepare() callbacks also are executed
after the hibernate memory preallocation has completed, so they are
not suitable for allocating additional memory either.  Thus the only
way a driver can safely allocate memory during hibernation is to use
a hibernate/suspend notifier.  However, the notifiers are called
before the freezing of user space and the drivers wanting to use them
for allocating additional memory may not know how much memory needs
to be allocated at that point.

To let device drivers overcome this difficulty rework the hibernation
sequence so that the memory preallocation is carried out after the
drivers' .prepare() callbacks have been executed, so that the
.prepare() callbacks can be used for allocating additional memory
to be used by the drivers' .freeze() callbacks.  Update documentation
to match the new behavior of the code.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
2011-05-17 23:26:00 +02:00
..
ABI PM / Hibernate: Add sysfs knob to control size of memory for drivers 2011-05-17 23:19:19 +02:00
accounting taskstats: pad taskstats netlink response for aligment issues on ia64 2010-12-22 19:43:34 -08:00
acpi ACPI, APEI, Add PCIe AER error information printing support 2011-03-21 22:59:08 -04:00
aoe
arm Fix common misspellings 2011-03-31 11:26:23 -03:00
auxdisplay
blackfin
block Fix common misspellings 2011-03-31 11:26:23 -03:00
blockdev
cdrom
cgroups memcg: update documentation to describe usage_in_bytes 2011-04-28 11:28:21 -07:00
connector
console
cpu-freq [CPUFREQ] Add documentation for sampling_down_factor 2011-03-16 17:54:31 -04:00
cpuidle
cris
crypto
development-process docs: update the development process document 2011-03-25 14:30:31 -06:00
device-mapper Fix common misspellings 2011-03-31 11:26:23 -03:00
devicetree Merge branch 'for-linus2' of git://git.profusion.mobi/users/lucas/linux-2.6 2011-04-07 11:14:49 -07:00
DocBook Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6 2011-04-27 15:17:52 -07:00
driver-model driver core: prune docs about device_interface 2010-11-10 16:57:11 -08:00
dvb Merge branch 'for-linus2' of git://git.profusion.mobi/users/lucas/linux-2.6 2011-04-07 11:14:49 -07:00
early-userspace
fault-injection
fb Fix common misspellings 2011-03-31 11:26:23 -03:00
filesystems Fix common misspellings 2011-03-31 11:26:23 -03:00
firmware_class
frv
hwmon hwmon: (adm1021) Clarify documentation regarding Xeon processors 2011-04-29 16:33:36 +02:00
i2c Fix common misspellings 2011-03-31 11:26:23 -03:00
i2o Fix common misspellings 2011-03-31 11:26:23 -03:00
ia64 Fix common misspellings 2011-03-31 11:26:23 -03:00
ide
infiniband
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2011-04-18 13:29:03 -07:00
ioctl Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6 2011-03-24 09:50:13 -07:00
isdn Fix common misspellings 2011-03-31 11:26:23 -03:00
ja_JP
kbuild Fix common misspellings 2011-03-31 11:26:23 -03:00
kdump kdump: update kexec-tools URL and Vivek's email 2010-11-25 14:36:38 +01:00
ko_KR Docs/Kconfig: Update: osdl.org -> linuxfoundation.org 2010-11-15 23:50:13 +01:00
kvm Fix common misspellings 2011-03-31 11:26:23 -03:00
laptops Documentation: fix minor typos/spelling 2011-04-04 17:51:47 -07:00
leds Documentation: consolidate leds files to leds/ subdir 2011-04-04 17:51:47 -07:00
lguest lguest: document --rng in example Launcher 2011-01-20 21:37:29 +10:30
m68k
make kbuild: introduce HDR_ARCH_LIST for headers_install_all 2010-12-14 22:16:19 +01:00
mips Fix common misspellings 2011-03-31 11:26:23 -03:00
misc-devices Fix common misspellings 2011-03-31 11:26:23 -03:00
mmc
mn10300
mtd
namespaces
netlabel
networking Merge branch 'for-linus2' of git://git.profusion.mobi/users/lucas/linux-2.6 2011-04-07 11:14:49 -07:00
nfc NFC: Driver for NXP Semiconductors PN544 NFC chip. 2011-01-13 08:03:19 -08:00
parisc
PCI Fix common misspellings 2011-03-31 11:26:23 -03:00
pcmcia pcmcia: use autoconfiguration feature for ioports and iomem 2010-09-29 17:20:24 +02:00
power PM: Allow drivers to allocate memory from .prepare() callbacks safely 2011-05-17 23:26:00 +02:00
powerpc Fix common misspellings 2011-03-31 11:26:23 -03:00
pps pps: add parallel port PPS signal generator 2011-01-13 08:03:21 -08:00
prctl
rapidio rapidio: add RapidIO documentation 2011-03-23 19:46:41 -07:00
RCU rcu: add documentation saying which RCU flavor to choose 2011-03-04 08:05:25 -08:00
s390 Documentation: fix minor typos/spelling 2011-04-04 17:51:47 -07:00
scheduler sched, doc: Beef up load balancing description 2011-03-31 13:00:35 +02:00
scsi Merge branch 'for-linus2' of git://git.profusion.mobi/users/lucas/linux-2.6 2011-04-07 11:14:49 -07:00
serial Fix common misspellings 2011-03-31 11:26:23 -03:00
sh sh: clkfwk: Kill off unused clk_set_rate_ex(). 2010-11-15 18:25:12 +09:00
sound Merge branch 'fix/hda' into for-linus 2011-04-21 12:44:38 +02:00
sparc
spi Fix common misspellings 2011-03-31 11:26:23 -03:00
sysctl Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2011-03-18 10:37:40 -07:00
target [SCSI] tcm_mod_builder.py: Fix generated *_drop_nodeacl() handler 2011-03-23 11:36:45 -05:00
telephony Fix common misspellings 2011-03-31 11:26:23 -03:00
thermal thermal: Add event notification to thermal framework 2011-01-12 00:08:35 -05:00
timers tree-wide: fix comment/printk typos 2010-11-01 15:38:34 -04:00
trace Fix common misspellings 2011-03-31 11:26:23 -03:00
uml
usb USB: usbmon: fix-up docs and text API for sparse ISO 2011-02-04 11:46:57 -08:00
video4linux Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6 2011-04-27 15:17:52 -07:00
vm Fix common misspellings 2011-03-31 11:26:23 -03:00
w1 Fix common misspellings 2011-03-31 11:26:23 -03:00
watchdog Fix common misspellings 2011-03-31 11:26:23 -03:00
wimax
x86 move x86 specific oops=panic to generic code 2011-03-22 17:44:11 -07:00
zh_CN Fix spelling mistakes in Documentation/zh_CN/SubmittingPatches 2011-02-28 19:30:48 -08:00
.gitignore
00-INDEX Documentation: consolidate leds files to leds/ subdir 2011-04-04 17:51:47 -07:00
apparmor.txt
applying-patches.txt
atomic_ops.txt
bad_memory.txt
basic_profiling.txt
binfmt_misc.txt
braille-console.txt
bt8xxgpio.txt
btmrvl.txt
BUG-HUNTING
bus-virt-phys-mapping.txt
cachetlb.txt
Changes Documentation/Changes: minor corrections 2011-03-22 17:44:17 -07:00
circular-buffers.txt
coccinelle.txt scripts/coccinelle: update for compatability with Coccinelle 0.2.4 2010-12-03 12:27:01 +01:00
CodingStyle Documentation/CodingStyle: flesh out if-else examples 2011-03-22 17:44:16 -07:00
cpu-hotplug.txt Fix common misspellings 2011-03-31 11:26:23 -03:00
cpu-load.txt
cputopology.txt topology/sysfs: Provide book id and siblings attributes 2010-09-09 20:41:25 +02:00
credentials.txt
dcdbas.txt
debugging-modules.txt
debugging-via-ohci1394.txt
dell_rbu.txt Fix common misspellings 2011-03-31 11:26:23 -03:00
devices.txt Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6 2010-10-28 09:35:11 -07:00
DMA-API-HOWTO.txt
DMA-API.txt
DMA-attributes.txt
DMA-ISA-LPC.txt
dmaengine.txt
dontdiff Documentation/dontdiff: add further autogenerated files to ignore list 2011-01-06 09:59:37 -08:00
dynamic-debug-howto.txt Merge branch 'docs-next' of git://git.lwn.net/linux-2.6 2011-03-27 19:46:59 -07:00
edac.txt Merge branch 'for-linus2' of git://git.profusion.mobi/users/lucas/linux-2.6 2011-04-07 11:14:49 -07:00
eisa.txt Fix common misspellings 2011-03-31 11:26:23 -03:00
email-clients.txt Documentation/email-clients.txt: update Thunderbird docs with wordwrap plugin 2011-01-13 08:03:15 -08:00
feature-removal-schedule.txt PM / ACPI: Remove acpi_sleep=s4_nonvs 2011-05-17 23:19:18 +02:00
flexible-arrays.txt flex_array: flex_array_prealloc takes a number of elements, not an end 2011-04-28 16:12:47 -04:00
futex-requeue-pi.txt
gcov.txt
gpio.txt Revert "gpiolib: annotate gpio-intialization with __must_check" 2011-01-13 17:26:46 -08:00
highuid.txt
HOWTO
hw_random.txt
hwspinlock.txt drivers: hwspinlock: add framework 2011-02-17 09:52:03 -08:00
init.txt
initrd.txt
intel_txt.txt
Intel-IOMMU.txt
io_ordering.txt
io-mapping.txt
iostats.txt Documentation/iostats.txt: bit-size reference etc. 2011-03-23 20:44:18 +01:00
IPMI.txt IPMI: Add the document description of ipmi_get_smi_info 2010-12-14 00:22:00 -05:00
IRQ-affinity.txt
IRQ.txt
irqflags-tracing.txt Fix common misspellings 2011-03-31 11:26:23 -03:00
isapnp.txt
java.txt
kernel-doc-nano-HOWTO.txt docbook: warn on unused doc entries 2010-09-11 16:49:21 -07:00
kernel-docs.txt Documentation: update kernel-docs.txt 2011-01-06 09:59:38 -08:00
kernel-parameters.txt PM / ACPI: Remove acpi_sleep=s4_nonvs 2011-05-17 23:19:18 +02:00
keys-request-key.txt KEYS: Add a new keyctl op to reject a key with a specified error code 2011-03-08 11:17:18 +11:00
keys-trusted-encrypted.txt keys: add new trusted key-type 2010-11-29 08:55:25 +11:00
keys.txt KEYS: Add an iovec version of KEYCTL_INSTANTIATE 2011-03-08 11:17:22 +11:00
kmemcheck.txt
kmemleak.txt Documentation: update kmemleak arch. info 2011-04-04 17:51:46 -07:00
kobject.txt
kprobes.txt tree-wide: fix comment/printk typos 2010-11-01 15:38:34 -04:00
kref.txt kref: Fix typo in kref documentation 2011-03-07 13:20:05 -08:00
ldm.txt
local_ops.txt
lockdep-design.txt
lockstat.txt
logo.gif
logo.txt
magic-number.txt take coda-private headers out of include/linux 2011-01-12 20:02:48 -05:00
Makefile [media] Remove the old V4L1 v4lgrab.c file 2010-12-29 08:17:12 -02:00
ManagementStyle
mca.txt
md.txt md: Update documentation for sync_min and sync_max entries 2011-04-20 15:40:01 +10:00
media-framework.txt Fix common misspellings 2011-03-31 11:26:23 -03:00
memory-barriers.txt smp: Document transitivity for memory barriers. 2011-03-04 08:05:49 -08:00
memory-hotplug.txt memory hotplug: Allow memory blocks to span multiple memory sections 2011-02-03 16:08:57 -08:00
memory.txt
mono.txt
mutex-design.txt mutex: Fix annotations to include it in kernel-locking docbook 2010-09-03 08:19:51 +02:00
nmi_watchdog.txt
nommu-mmap.txt
numastat.txt
oops-tracing.txt
padata.txt
parport-lowlevel.txt
parport.txt
pi-futex.txt
pnp.txt
preempt-locking.txt
printk-formats.txt
prio_tree.txt
rbtree.txt Documentation: remove anticipatory scheduler info 2010-11-11 12:09:59 +01:00
rfkill.txt
robust-futex-ABI.txt
robust-futexes.txt
rt-mutex-design.txt
rt-mutex.txt
rtc.txt RTC: Fix up rtc.txt documentation to reflect changes to generic rtc layer 2011-03-09 11:25:10 -08:00
SAK.txt
SecurityBugs Fix common misspellings 2011-03-31 11:26:23 -03:00
SELinux.txt
serial-console.txt
sgi-ioc4.txt
sgi-visws.txt
SM501.txt
Smack.txt
sparse.txt
spinlocks.txt locking: Remove deprecated lock initializers 2011-01-27 12:30:38 +01:00
stable_api_nonsense.txt
stable_kernel_rules.txt
SubmitChecklist
SubmittingDrivers Fix common misspellings 2011-03-31 11:26:23 -03:00
SubmittingPatches Fix common misspellings 2011-03-31 11:26:23 -03:00
svga.txt
sysfs-rules.txt
sysrq.txt documentation: update sysrq.txt magic sysrq keys 2010-10-26 17:32:41 -07:00
tomoyo.txt
unaligned-memory-access.txt
unicode.txt
unshare.txt
VGA-softcursor.txt
vgaarbiter.txt
video-output.txt
volatile-considered-harmful.txt
workqueue.txt workqueue: Document debugging tricks 2011-03-31 13:40:42 +02:00
xz.txt decompressors: add XZ decompressor module 2011-01-13 08:03:24 -08:00
zorro.txt