Glauber Costa
a8964b9b84
memcg: use static branches when code not in use ...
We can use static branches to patch the code in or out when not used.
Because the _ACTIVE bit on kmem_accounted is only set after the increment
is done, we guarantee that the root memcg will always be selected for kmem
charges until all call sites are patched (see memcg_kmem_enabled). This
guarantees that no mischarges are applied.
Static branch decrement happens when the last reference count from the
kmem accounting in memcg dies. This will only happen when the charges
drop down to 0.
When that happens, we need to disable the static branch only on those
memcgs that enabled it. To achieve this, we would be forced to complicate
the code by keeping track of which memcgs were the ones that actually
enabled limits, and which ones got it from its parents.
It is a lot simpler just to do static_key_slow_inc() on every child
that is accounted.
Signed-off-by: Glauber Costa <glommer@parallels.com>
Acked-by: Michal Hocko <mhocko@suse.cz>
Acked-by: Kamezawa Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@cs.helsinki.fi>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Suleiman Souhlal <suleiman@google.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Frederic Weisbecker <fweisbec@redhat.com>
Cc: Greg Thelen <gthelen@google.com>
Cc: JoonSoo Kim <js1304@gmail.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Rik van Riel <riel@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-12-18 15:02:13 -08:00
ARM: 7588/1: amba: create a resource parent registrator
2012-12-03 11:15:35 +00:00
Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus
2012-12-14 14:27:45 -08:00
ARM: arm-soc: Updates for Marvell mvebu/kirkwood
2012-12-14 14:54:26 -08:00
This is the MFD patch set for the 3.8 merge window.
2012-12-16 18:55:20 -08:00
This is the MFD patch set for the 3.8 merge window.
2012-12-16 18:55:20 -08:00
ARM: arm-soc: Device-tree updates, take 2
2012-12-14 14:42:53 -08:00
This is the MFD patch set for the 3.8 merge window.
2012-12-16 18:55:20 -08:00
mlx4: 64-byte CQE/EQE support
2012-11-26 10:19:17 -08:00
MMC highlights for 3.8:
2012-12-11 11:19:09 -08:00
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/jesse/openvswitch
2012-11-30 12:01:30 -05:00
pinctrl: generic: add input schmitt disable parameter
2012-11-21 08:55:26 +01:00
drivers/video/backlight/lp855x_bl.c: use generic PWM functions
2012-12-17 17:15:16 -08:00
Highlights:
2012-12-13 19:26:04 -08:00
lib/raid6: Add AVX2 optimized gen_syndrome functions
2012-12-13 19:51:03 +11:00
Merge remote-tracking branch 'regulator/topic/tol' into regulator-next
2012-12-10 12:43:22 +09:00
Linux 3.7-rc8
2012-12-07 17:02:47 +00:00
Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus
2012-12-14 14:27:45 -08:00
SUNRPC: Don't allow low priority tasks to pre-empt higher priority ones
2012-12-06 00:30:53 +01:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
2012-12-12 18:07:07 -08:00
Merge branch 'x86-acpi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2012-12-14 10:03:23 -08:00
gpio / ACPI: add ACPI support
2012-11-30 12:37:36 +01:00
Revert "libata: check SATA_SETTINGS log with HW Feature Ctrl"
2012-12-14 09:34:01 -05:00
pata_platform: remove unused remove function
2012-12-03 05:15:33 -05:00
ath9k: allow to load EEPROM content via firmware API
2012-12-10 15:49:57 -05:00
atm: add release_cb() callback to vcc
2012-12-02 00:05:12 +00:00
Revert "bdi: add a user-tunable cpu_list for the bdi flusher threads"
2012-12-17 11:29:09 -08:00
backlight: add of_find_backlight_by_node()
2012-12-17 17:15:16 -08:00
mm: introduce a common interface for balloon pages mobility
2012-12-11 17:22:26 -08:00
ssb/bcma: add common header for watchdog
2012-12-06 14:58:56 -05:00
exec: use -ELOOP for max recursion depth
2012-12-17 17:15:23 -08:00
block: discard granularity might not be power of 2
2012-12-14 20:46:04 +01:00
mm/bootmem.c: remove unused wrapper function reserve_bootmem_generic()
2012-12-12 17:38:35 -08:00
bsg: Remove unused function bsg_goose_queue()
2012-12-06 14:33:02 +01:00
include/linux/bug.h: fix sparse warning related to BUILD_BUG_ON_INVALID
2012-11-26 17:41:24 -08:00
The common clock framework changes for 3.8 are comprised of lots of
2012-12-11 11:25:08 -08:00
compat: generic compat_sys_sched_rr_get_interval() implementation
2012-12-17 17:15:18 -08:00
linux/compiler.h: add __must_hold macro for functions called with a lock held
2012-12-17 17:15:23 -08:00
context_tracking: New context tracking susbsystem
2012-11-30 11:40:07 -08:00
do_coredump(): get rid of pt_regs argument
2012-11-29 00:01:25 -05:00
thermal: cpu cooling: allow module builds
2012-11-22 15:59:52 +08:00
cpuset: use N_MEMORY instead N_HIGH_MEMORY
2012-12-12 17:38:32 -08:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
2012-12-17 15:44:47 -08:00
PM / devfreq: remove compiler error when a governor is module
2012-11-26 19:17:44 +09:00
Merge branch 'x86-ras-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2012-12-14 09:59:59 -08:00
common: DMA-mapping: add DMA_ATTR_FORCE_CONTIGUOUS attribute
2012-11-29 03:30:34 -08:00
drivers: cma: represent physical addresses as phys_addr_t
2012-12-11 09:28:09 +01:00
EDAC: Fix csrow size reported in sysfs
2012-11-28 11:54:40 +01:00
Revert "x86-64/efi: Use EFI to deal with platform wall clock (again)"
2012-12-15 15:20:41 -08:00
fs, exportfs: add exportfs_encode_inode_fh() helper
2012-12-17 17:15:27 -08:00
extcon: kernel_doc style fix
2012-11-22 13:43:27 +09:00
kill daemonize()
2012-11-28 21:49:02 -05:00
Merge branch 'for-3.8' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup
2012-12-12 08:18:24 -08:00
Merge branch 'akpm' (Andrew's patch-bomb)
2012-12-17 20:58:12 -08:00
kill daemonize()
2012-11-28 21:49:02 -05:00
drivers/video: fsl-diu-fb: add support for set_gamma ioctls
2012-11-26 13:41:19 -06:00
lseek: the "whence" argument is called "whence"
2012-12-17 17:15:12 -08:00
block: store partition_meta_info.uuid as a string
2012-11-23 14:28:53 +01:00
mm: allocate kernel pages to the right memcg
2012-12-18 15:02:12 -08:00
gpiolib: rename pin range arguments
2012-11-21 10:07:48 +01:00
propagate name change to comments in kernel source
2012-12-06 10:39:54 +01:00
HID: sensors: autodetect USB HID sensor hubs
2012-12-12 16:49:10 +01:00
Merge branches 'for-3.7/upstream-fixes', 'for-3.8/hidraw', 'for-3.8/i2c-hid', 'for-3.8/multitouch', 'for-3.8/roccat', 'for-3.8/sensors' and 'for-3.8/upstream' into for-linus
2012-12-12 21:41:55 +01:00
Automatic NUMA Balancing V11
2012-12-16 15:18:08 -08:00
Automatic NUMA Balancing V11
2012-12-16 15:18:08 -08:00
i2c / ACPI: add ACPI enumeration support
2012-11-23 12:23:40 +01:00
wireless: fix VHT max AMPDU exponent definition
2012-12-06 14:02:51 +01:00
netconf: advertise mc_forwarding status
2012-12-04 13:08:10 -05:00
include/linux/init.h: use the stringify operator for the __define_initcall macro
2012-12-17 17:15:12 -08:00
net: Add support for hardware-offloaded encapsulation
2012-12-09 00:20:28 -05:00
ipack: remove use of __devinitconst
2012-11-21 15:09:26 -08:00
net: Add support for hardware-offloaded encapsulation
2012-12-09 00:20:28 -05:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
2012-12-13 14:20:19 -08:00
kstrto*: add documentation
2012-12-17 17:15:22 -08:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security
2012-12-16 15:40:50 -08:00
kobject: remove CONFIG_HOTPLUG ifdefs
2012-11-28 10:33:03 -08:00
Merge tag 'kvm-3.8-1' of git://git.kernel.org/pub/scm/virt/kvm/kvm
2012-12-13 15:31:08 -08:00
led: Add dependency on CONFIG_LEDS_TRIGGERS to led_trigger_rename_static()
2012-11-26 14:28:51 -08:00
libata: implement ata_platform_remove_one()
2012-12-03 05:15:17 -05:00
loop: Limit the number of requests in the bio list
2012-11-30 11:48:05 +01:00
Merge branch 'for-3.8/drivers' of git://git.kernel.dk/linux-block
2012-12-17 13:39:11 -08:00
memcg: use static branches when code not in use
2012-12-18 15:02:13 -08:00
hotplug: update nodemasks management
2012-12-12 17:38:33 -08:00
mm, memory-hotplug: dynamic configure movable memory and portion memory
2012-12-11 17:22:28 -08:00
Automatic NUMA Balancing V11
2012-12-16 15:18:08 -08:00
net: add micrel KSZ8873MLL switch support
2012-11-23 14:29:51 -05:00
Automatic NUMA Balancing V11
2012-12-16 15:18:08 -08:00
[SCSI] miscdevice: Adding support for MPT3SAS_MINOR(222)
2012-12-01 10:07:54 +00:00
Automatic NUMA Balancing V11
2012-12-16 15:18:08 -08:00
Merge branch 'slab/for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg/linux
2012-12-18 10:56:07 -08:00
Automatic NUMA Balancing V11
2012-12-16 15:18:08 -08:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
2012-12-13 12:00:02 -08:00
NFSv4.1: Move slot table and session struct definitions to nfs4session.h
2012-12-06 00:30:46 +01:00
NFSv4.1: Move the RPC timestamp out of the slot.
2012-12-15 15:21:52 -05:00
mm: cleanup register_node()
2012-12-11 17:22:27 -08:00
numa: add CONFIG_MOVABLE_NODE for movable-dedicated node
2012-12-12 17:38:34 -08:00
Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc
2012-12-18 09:58:09 -08:00
of/address: sparc: Declare of_iomap as an extern function for sparc again
2012-11-23 22:01:15 +00:00
of/i2c: add dummy inline functions for when CONFIG_OF_I2C(_MODULE) isn't defined
2012-12-11 17:30:16 +00:00
ARM: OMAP: Move plat-omap/dma-omap.h to include/linux/omap-dma.h
2012-11-30 08:41:50 -08:00
mm, oom: fix race when specifying a thread as the oom origin
2012-12-11 17:22:27 -08:00
openvswitch: add skb mark matching and set action
2012-11-26 11:33:18 -08:00
memory-hotplug: skip HWPoisoned page when offlining pages
2012-12-11 17:22:22 -08:00
mm: introduce a common interface for balloon pages mobility
2012-12-11 17:22:26 -08:00
PCI changes for the v3.8 merge window:
2012-12-13 12:14:47 -08:00
tty/8250 Add support for Commtech's Fastcom Async-335 and Fastcom Async-PCIe cards
2012-11-21 16:31:17 -08:00
percpu_rw_semaphore: add lockdep annotations
2012-12-17 17:15:18 -08:00
Merge branch 'akpm' (Andrew's patch-bomb)
2012-12-17 20:58:12 -08:00
efi_pstore: Add a sequence counter to a variable name
2012-11-26 16:07:44 -08:00
ptrace: introduce PTRACE_O_EXITKILL
2012-12-17 17:15:22 -08:00
time: export time information for KVM pvclock
2012-11-27 23:29:12 -02:00
prandom: introduce prandom_bytes() and prandom_bytes_state()
2012-12-17 17:15:26 -08:00
context_tracking: New context tracking susbsystem
2012-11-30 11:40:07 -08:00
Merge remote-tracking branch 'regmap/topic/table' into regmap-next
2012-12-11 12:39:32 +09:00
res_counter: return amount of charges after res_counter_uncharge()
2012-12-18 15:02:12 -08:00
mm/rmap, migration: Make rmap_walk_anon() and try_to_unmap_anon() more scalable
2012-12-11 14:43:00 +00:00
pidns: remove unused is_container_init()
2012-12-17 17:15:23 -08:00
mm: support more pagesizes for MAP_HUGETLB/SHM_HUGETLB
2012-12-11 17:22:25 -08:00
net: Add support for hardware-offloaded encapsulation
2012-12-09 00:20:28 -05:00
slab: Simplify bootstrap
2012-12-11 12:14:27 +02:00
net: phy: smsc: force all capable mode if the phy is started in powerdown mode
2012-12-07 12:48:00 -05:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
2012-12-13 12:00:02 -08:00
string: introduce helper to get base file name from given path
2012-12-17 17:15:17 -08:00
lseek: the "whence" argument is called "whence"
2012-12-17 17:15:12 -08:00
net: Add support for hardware-offloaded encapsulation
2012-12-09 00:20:28 -05:00
Thermal: Fix DEFAULT_THERMAL_GOVERNOR
2012-12-12 15:34:48 +08:00
mm, oom: fix race when specifying a thread as the oom origin
2012-12-11 17:22:27 -08:00
net: Add support for hardware-offloaded encapsulation
2012-12-09 00:20:28 -05:00
Automatic NUMA Balancing V11
2012-12-16 15:18:08 -08:00
mm: numa: Add pte updates, hinting and migration stats
2012-12-11 14:42:48 +00:00
wait: add wait_event_lock_irq() interface
2012-11-30 11:47:57 +01:00
writeback: remove nr_pages_dirtied arg from balance_dirty_pages_ratelimited_nr()
2012-12-11 17:22:21 -08:00
