Rafael J. Wysocki
124cf9117c
PM / sleep: Make it possible to quiesce timers during suspend-to-idle ...
The efficiency of suspend-to-idle depends on being able to keep CPUs
in the deepest available idle states for as much time as possible.
Ideally, they should only be brought out of idle by system wakeup
interrupts.
However, timer interrupts occurring periodically prevent that from
happening and it is not practical to chase all of the "misbehaving"
timers in a whack-a-mole fashion. A much more effective approach is
to suspend the local ticks for all CPUs and the entire timekeeping
along the lines of what is done during full suspend, which also
helps to keep suspend-to-idle and full suspend reasonably similar.
The idea is to suspend the local tick on each CPU executing
cpuidle_enter_freeze() and to make the last of them suspend the
entire timekeeping. That should prevent timer interrupts from
triggering until an IO interrupt wakes up one of the CPUs. It
needs to be done with interrupts disabled on all of the CPUs,
though, because otherwise the suspended clocksource might be
accessed by an interrupt handler which might lead to fatal
consequences.
Unfortunately, the existing ->enter callbacks provided by cpuidle
drivers generally cannot be used for implementing that, because some
of them re-enable interrupts temporarily and some idle entry methods
cause interrupts to be re-enabled automatically on exit. Also some
of these callbacks manipulate local clock event devices of the CPUs
which really shouldn't be done after suspending their ticks.
To overcome that difficulty, introduce a new cpuidle state callback,
->enter_freeze, that will be guaranteed (1) to keep interrupts
disabled all the time (and return with interrupts disabled) and (2)
not to touch the CPU timer devices. Modify cpuidle_enter_freeze() to
look for the deepest available idle state with ->enter_freeze present
and to make the CPU execute that callback with suspended tick (and the
last of the online CPUs to execute it with suspended timekeeping).
Suggested-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
2015-02-15 19:40:09 +01:00
ARM: 8256/1: driver coamba: add device binding path 'driver_override'
2015-02-10 10:23:15 +00:00
bcma: implement host code support for PCIe Gen 2 devices
2015-01-29 10:54:43 +02:00
libceph: fix sparse endianness warnings
2015-01-08 20:36:57 +03:00
ARM: OMAP2+: clock: fix DPLL code to use new determine rate APIs
2014-12-15 17:05:08 -08:00
fsl /bestcomm
gpio: Make the vararg hacks not pass magic values
2015-01-15 17:23:22 +01:00
USB patches for 3.19-rc1
2014-12-14 14:57:16 -08:00
Input: MT - add support for balanced slot assignment
2015-02-01 11:50:35 -08:00
arm64: GICv3: introduce symbolic names for GICv3 ICC_SGI1R_EL1 fields
2015-01-20 18:25:31 +01:00
This is the GPIO bulk changes for the v3.20 series:
2015-02-11 11:17:34 -08:00
IB/mlx4: Reset flow support for IB kernel ULPs
2015-02-09 14:03:53 -08:00
IB/mlx5: Handle page faults
2014-12-15 18:19:03 -08:00
MMC core:
2015-02-11 10:56:48 -08:00
fs: introduce f_op->mmap_capabilities for nommu mmap support
2015-01-20 14:02:58 -07:00
SCSI misc on 20150209
2015-02-11 10:28:45 -08:00
pinctrl: consumer: use correct retval for placeholder functions
2015-01-14 14:21:51 +01:00
IOMMU Updates for Linux v3.20
2015-02-12 09:16:56 -08:00
power: charger-manager: Use alarmtimer for battery monitoring in suspend.
2015-01-21 20:52:07 +01:00
Merge remote-tracking branches 'regulator/topic/max8649', 'regulator/topic/mode', 'regulator/topic/mt6397', 'regulator/topic/pfuze100' and 'regulator/topic/qcom-rpm' into regulator-next
2015-02-08 11:16:27 +08:00
soc /ti
Merge remote-tracking branches 'spi/topic/orion', 'spi/topic/pxa2xx', 'spi/topic/qup', 'spi/topic/rockchip' and 'spi/topic/samsung' into spi-next
2015-02-08 11:16:55 +08:00
bcma: detect SPROM revision 11
2015-01-29 10:49:28 +02:00
Merge branch 'for-3.20' of git://linux-nfs.org/~bfields/linux
2015-02-12 10:39:41 -08:00
USB patches for 3.19-rc1
2014-12-14 14:57:16 -08:00
ACPI: Add interfaces to parse IOAPIC ID for IOAPIC hotplug
2015-02-05 15:09:26 +01:00
ata: ahci_platform: fix owner module reference mismatch for scsi host
2015-01-28 18:45:23 -05:00
libata: s/ata_id_removeable()/ata_id_removable()/
2014-12-25 15:27:16 -05:00
ata: pata_platform: fix owner module reference mismatch for scsi host
2015-01-28 18:45:23 -05:00
Merge branch 'upstream' of git://git.infradead.org/users/pcmoore/audit
2015-02-11 20:07:47 -08:00
fs: remove default_backing_dev_info
2015-01-20 14:05:38 -07:00
syscalls: implement execveat() system call
2014-12-13 12:42:51 -08:00
block: merge __bio_map_user_iov into bio_map_user_iov
2015-02-05 09:30:43 -07:00
lib/bitmap.c: make the bits parameter of bitmap_remap unsigned
2015-02-12 18:54:14 -08:00
ARM: 8187/1: add CONFIG_HAVE_ARCH_BITREVERSE to support rbit instruction
2014-12-22 16:43:06 +00:00
Merge branch 'for-3.20/core' of git://git.kernel.dk/linux-block
2015-02-12 14:13:23 -08:00
blk-mq: Allow requests to never expire
2015-01-08 08:59:01 -07:00
block: remove unused function blk_bio_map_sg
2015-02-11 11:24:14 -07:00
fs: introduce f_op->mmap_capabilities for nommu mmap support
2015-01-20 14:02:58 -07:00
cgroup: add dummy css_put() for !CONFIG_CGROUPS
2015-01-06 12:02:46 -05:00
cgroup: reorder SUBSYS(blkio) in cgroup_subsys.h
2015-01-06 12:02:46 -05:00
time: move the timecounter/cyclecounter code into its own file.
2014-12-30 18:29:25 -05:00
mm: cma: split cma-reserved in dmesg log
2014-12-18 19:08:10 -08:00
mm/compaction: add tracepoint to observe behaviour of compaction defer
2015-02-11 17:06:04 -08:00
compat: Declare compat_sys_sigpending and compat_sys_sigprocmask prototypes
2015-01-27 09:37:53 +00:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
2015-02-11 17:42:32 -08:00
thermal: cpu_cooling: return ERR_PTR() for !CPU_THERMAL or !THERMAL_OF
2014-12-17 09:00:04 -04:00
cpufreq: remove CPUFREQ_UPDATE_POLICY_CPU notifications
2015-01-23 23:06:44 +01:00
PM / sleep: Make it possible to quiesce timers during suspend-to-idle
2015-02-15 19:40:09 +01:00
linux/cpumask.h: update bitmap wrappers to take unsigned int
2015-02-12 18:54:14 -08:00
lib/halfmd4.c: simplify includes
2015-02-12 18:54:15 -08:00
Driver core patches for 3.19-rc1
2014-12-14 16:10:09 -08:00
PM / devfreq: event: Add devfreq_event class
2015-01-30 17:56:40 +09:00
PM: Eliminate CONFIG_PM_RUNTIME
2014-12-19 22:55:06 +01:00
dm: allocate requests in target when stacking on blk-mq devices
2015-02-09 13:06:47 -05:00
Driver core patches for 3.19-rc1
2014-12-14 16:10:09 -08:00
quota: Cleanup flags definitions
2015-01-21 19:21:30 +01:00
arm64 updates for 3.20:
2015-02-11 18:03:54 -08:00
ses: Add power_status to SES device slot
2015-01-09 15:44:19 +01:00
net: Add Transparent Ethernet Bridging GRO support.
2015-01-02 15:46:41 -05:00
ethtool: Support for configurable RSS hash function
2014-12-08 21:07:10 -05:00
exportfs: add methods for block layout exports
2015-02-05 14:35:17 +01:00
f2fs: introduce macros to convert bytes and blocks in f2fs
2015-02-11 17:04:48 -08:00
fault-inject: add ratelimit option
2014-12-13 12:42:52 -08:00
video: fbdev: Check Standard Timing against DMT
2015-01-15 13:33:41 +02:00
net: fec: add Wake-on-LAN support
2014-12-31 13:06:50 -05:00
include/linux/file.h: remove get_unused_fd() macro
2014-12-10 17:41:10 -08:00
Merge branch 'akpm' (patches from Andrew)
2015-02-12 18:54:28 -08:00
fsnotify: fix handling of renames in audit
2015-02-10 14:30:28 -08:00
fsnotify: remove destroy_list from fsnotify_mark
2014-12-13 12:42:53 -08:00
tracing: Add tp_printk cmdline to have tracepoints go to printk()
2014-12-15 10:17:38 -05:00
The updates included in this pull request for ftrace are:
2015-02-12 08:37:41 -08:00
genetlink: synchronize socket closing and family removal
2015-01-16 17:04:25 -05:00
mm/mempolicy.c: merge alloc_hugepage_vma to alloc_pages_vma
2015-02-11 17:06:04 -08:00
net, lib: kill arch_fast_hash library bits
2014-12-10 15:17:46 -05:00
[media] hdmi: rename HDMI_AUDIO_CODING_TYPE_EXT_STREAM to _EXT_CT
2015-01-27 10:19:12 -02:00
HID: rmi: Scan the report descriptor to determine if the device is suitable for the hid-rmi driver
2014-12-17 09:13:13 +01:00
hrtimer: Prevent stale expiry time in hrtimer_interrupt()
2015-01-23 12:13:20 +01:00
mm: numa: do not trap faults on the huge zero page
2015-02-12 18:54:08 -08:00
mm/hugetlb: take page table lock in follow_huge_pmd()
2015-02-11 17:06:01 -08:00
mm: hugetlb_cgroup: convert to lockless page counters
2014-12-10 17:41:04 -08:00
hyperv: Add support for vNIC hot removal
2014-12-08 20:24:11 -05:00
i2c: Only include slave support if selected
2015-01-26 22:05:20 +01:00
mac80111: Add BIP-CMAC-256 cipher
2015-01-27 11:09:13 +01:00
net: replace br_fdb_external_learn_* calls with switchdev notifier events
2015-01-18 00:23:57 -05:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2015-02-05 14:33:28 -08:00
all arches, signal: move restart_block to struct task_struct
2015-02-12 18:54:12 -08:00
linux/interrupt.h: remove the definition of unused tasklet_hi_enable
2014-12-12 15:15:41 -05:00
ARM: SoC/iommu configuration for 3.19
2014-12-16 14:53:01 -08:00
iopoll: Introduce memory-mapped IO polling macros
2015-01-19 16:11:59 +00:00
iommu: Make IOVA domain page size explicit
2015-01-19 14:55:22 +01:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2014-12-16 15:53:03 -08:00
ipmi: Use the proper type for acpi_handle
2014-12-11 15:04:06 -06:00
ipmi: Remove the now unused priority from SMI sender
2014-12-11 15:04:11 -06:00
ipv6: pull cork initialization into its own function.
2015-02-02 19:28:04 -08:00
Merge branch 'irq-irqdomain-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2014-12-10 09:01:01 -08:00
jbd: drop jbd_ENOSYS debug
2015-01-15 10:34:54 +01:00
jbd: drop jbd_ENOSYS debug
2015-01-15 10:34:54 +01:00
printk: add and use LOGLEVEL_<level> defines for KERN_<LEVEL> equivalents
2014-12-10 17:41:11 -08:00
kernel.h: remove ancient __FUNCTION__ hack
2015-02-12 18:54:13 -08:00
genirq: Prevent proc race against freeing of irq descriptors
2014-12-13 13:33:07 +01:00
include/linux/kmemleak.h: needs slab.h
2014-12-13 12:42:47 -08:00
kprobes: Pass the original kprobe for preparing optimized kprobe
2015-01-13 16:10:16 +00:00
Couple of items for 3.20
2015-01-24 10:11:12 +01:00
Fairly small update, but there are some interesting new features.
2015-02-13 09:55:09 -08:00
KVM: move APIC types to arch/x86/
2014-12-18 09:39:51 +01:00
leds: Add LED Flash class extension to the LED subsystem
2015-01-26 14:59:08 -08:00
leds: Add LED Flash class extension to the LED subsystem
2015-01-26 14:59:08 -08:00
Merge branch 'for-3.20/drivers' of git://git.kernel.dk/linux-block
2015-02-12 14:30:53 -08:00
memcg: reparent list_lrus and free kmemcg_id on css offline
2015-02-12 18:54:10 -08:00
list_nulls: fix missing header
2015-01-04 23:11:43 -05:00
livepatch: rename config to CONFIG_LIVEPATCH
2015-02-04 11:25:51 +01:00
list_lru: introduce per-memcg lists
2015-02-12 18:54:09 -08:00
mm: numa: do not dereference pmd outside of the lock during NUMA hinting fault
2015-02-12 18:54:08 -08:00
fs/proc/task_mmu.c: add user-space support for resetting mm->hiwater_rss (peak RSS)
2015-02-12 18:54:12 -08:00
mm: account pmd page tables to the process
2015-02-11 17:06:04 -08:00
Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux
2014-12-15 15:52:01 -08:00
mm: microoptimize zonelist operations
2015-02-11 17:06:02 -08:00
of: Fix brace position for struct of_device_id definition
2015-02-03 20:31:05 -06:00
module: make module_refcount() a signed integer.
2015-01-22 11:15:54 +10:30
module: remove mod arg from module_free, rename module_memfree().
2015-01-20 11:38:33 +10:30
make nameidata completely opaque outside of fs/namei.c
2014-12-10 21:32:13 -05:00
netdev: introduce new NETIF_F_HW_SWITCH_OFFLOAD feature flag for switch device offloads
2015-02-01 23:16:33 -08:00
net:rfs: adjust table size checking
2015-02-08 21:54:09 -08:00
netlink/genetlink: pass network namespace to bind/unbind
2014-12-27 03:07:50 -05:00
Merge branch 'for-3.20' of git://linux-nfs.org/~bfields/linux
2015-02-12 10:39:41 -08:00
nfsv3: introduce nfs3_set_ds_client
2015-02-03 11:06:34 -08:00
pnfs/flexfiles: Add the FlexFile Layout Driver
2015-02-03 11:06:52 -08:00
nfs: add mirroring support to pgio layer
2015-02-03 11:06:45 -08:00
NFSv4.1: Pin the inode and super block in asynchronous layoutreturns
2015-02-05 22:16:45 -05:00
linux/nodemask.h: update bitmap wrappers to take unsigned int
2015-02-12 18:54:14 -08:00
take the targets of /proc/*/ns/* symlinks to separate fs
2014-12-10 21:30:20 -05:00
NVMe: avoid kmalloc/kfree for smaller IO
2015-01-29 09:25:34 -08:00
Devicetree changes for v3.19
2014-12-11 13:06:58 -08:00
gpio/gpiolib-of: Create of_mm_gpiochip_remove
2015-01-15 17:23:17 +01:00
oom, PM: make OOM detection in the freezer path raceless
2015-02-11 17:06:03 -08:00
locking/mcs: Better differentiate between MCS variants
2015-01-14 15:07:32 +01:00
mm: add 'foreign' alias for the 'pinned' page flag
2015-01-28 14:03:09 +00:00
mm: page_counter: pull "-1" handling out of page_counter_memparse()
2015-02-11 17:06:02 -08:00
mm/page_owner.c: remove unnecessary stack_trace field
2015-02-11 17:06:07 -08:00
mm/page_owner: keep track of page owners
2014-12-13 12:42:48 -08:00
mm: get rid of radix tree gfp mask for pagecache_get_page
2014-12-29 12:45:45 -08:00
ACPI and power management updates for v3.20-rc1
2015-02-10 15:09:41 -08:00
USB patches for 3.19-rc1
2014-12-14 14:57:16 -08:00
percpu: remove __get_cpu_var and __raw_get_cpu_var macros
2014-12-13 12:42:53 -08:00
percpu_ref: implement percpu_ref_is_dying()
2015-01-06 10:26:10 -05:00
powerpc updates for 3.20
2015-02-11 18:15:38 -08:00
perf: Move task_pt_regs sampling into arch code
2015-01-09 11:12:28 +01:00
net: phy: keep track of the PHY suspend state
2015-01-27 00:16:51 -08:00
net: Allow FIXED_PHY to be modular.
2014-12-16 15:02:23 -05:00
PM: Convert dev_pm_put_subsys_data() into a void function
2015-02-03 22:59:25 +01:00
PM / Domains: Eliminate the mutex for the generic_pm_domain_data
2015-02-03 22:56:53 +01:00
Merge branch 'for-linus' of git://ftp.arm.linux.org.uk/~rmk/linux-arm
2014-12-12 15:26:48 -08:00
hexdump: make it return number of bytes placed in buffer
2015-02-12 18:54:15 -08:00
take the targets of /proc/*/ns/* symlinks to separate fs
2014-12-10 21:30:20 -05:00
pstore: Add pmsg - user-space accessible pstore object
2015-01-16 16:01:10 -08:00
pstore: Add pmsg - user-space accessible pstore object
2015-01-16 16:01:10 -08:00
exit: ptrace: shift "reap dead" code from exit_ptrace() to forget_original_parent()
2014-12-10 17:41:10 -08:00
spi: pxa2xx: Add definition for Intel Quark DDS_RATE register
2014-12-22 20:17:23 +00:00
quota: Store maximum space limit in bytes
2015-01-30 12:51:21 +01:00
quota: Add ->quota_{enable,disable} callbacks for VFS quotas
2015-01-30 12:50:32 +01:00
ratelimit: add initialization macro
2014-12-13 12:42:52 -08:00
rculist: Fix sparse warning
2015-01-06 11:01:13 -08:00
Merge branches 'doc.2015.01.07a', 'fixes.2015.01.15a', 'preempt.2015.01.06a', 'srcu.2015.01.06a', 'stall.2015.01.16a' and 'torture.2015.01.11a' into HEAD
2015-01-15 23:34:34 -08:00
Merge branches 'doc.2015.01.07a', 'fixes.2015.01.15a', 'preempt.2015.01.06a', 'srcu.2015.01.06a', 'stall.2015.01.16a' and 'torture.2015.01.11a' into HEAD
2015-01-15 23:34:34 -08:00
Merge branches 'doc.2015.01.07a', 'fixes.2015.01.15a', 'preempt.2015.01.06a', 'srcu.2015.01.06a', 'stall.2015.01.16a' and 'torture.2015.01.11a' into HEAD
2015-01-15 23:34:34 -08:00
regmap: correct the description of structure element in reg_field
2015-01-27 13:13:04 +00:00
resources: Move struct resource_list_entry from ACPI into resource core
2015-02-05 15:09:25 +01:00
rhashtable: Introduce rhashtable_walk_*
2015-02-04 20:34:52 -08:00
rmap: drop support of non-linear mappings
2015-02-10 14:30:31 -08:00
rtc: Convert rtc_set_ntp_time() to use timespec64
2015-01-23 17:21:57 -08:00
rtnetlink: delay RTM_DELLINK notification until after ndo_uninit()
2014-12-09 13:36:57 -05:00
kernel/sched/clock.c: add another clock for use with the soft lockup watchdog
2015-02-12 18:54:13 -08:00
vmscan: per memory cgroup slab shrinkers
2015-02-12 18:54:09 -08:00
net: fix a typo in skb_checksum_validate_zero_check
2015-02-08 16:28:26 -08:00
memcg: free memcg_caches slot on css offline
2015-02-12 18:54:10 -08:00
slab: embed memcg_cache_params to kmem_cache
2015-02-12 18:54:09 -08:00
slab: embed memcg_cache_params to kmem_cache
2015-02-12 18:54:09 -08:00
init: Get rid of x86isms
2015-01-22 15:10:56 +01:00
net: bury net/core/iovec.c - nothing in there is used anymore
2015-02-04 01:34:15 -05:00
spinlock: Add spin_lock_bh_nested()
2015-01-03 14:32:57 -05:00
spinlock: Add spin_lock_bh_nested()
2015-01-03 14:32:57 -05:00
spinlock: Add spin_lock_bh_nested()
2015-01-03 14:32:57 -05:00
rcu: Combine DEFINE_SRCU() and DEFINE_STATIC_SRCU()
2015-01-06 11:04:27 -08:00
stacktrace: introduce snprint_stack_trace for buffer output
2014-12-13 12:42:48 -08:00
lib/string.c: remove strnicmp()
2015-02-12 18:54:14 -08:00
libstring_helpers.c:string_get_size(): return void
2015-02-12 18:54:13 -08:00
PM / sleep: Re-implement suspend-to-idle handling
2015-02-13 23:49:36 +01:00
swap: remove unused mem_cgroup_uncharge_swapcache declaration
2015-02-11 17:06:00 -08:00
mm: page_cgroup: rename file to mm/swap_cgroup.c
2014-12-10 17:41:09 -08:00
mm: remove remaining references to NUMA hinting bits and helpers
2015-02-12 18:54:08 -08:00
syscalls: Declare sys_*stat64 prototypes if __ARCH_WANT_(COMPAT_)STAT64
2015-01-27 09:38:00 +00:00
tcp: mitigate ACK loops for connections as tcp_timewait_sock
2015-02-08 01:03:13 -08:00
Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/evalenti/linux-soc-thermal into thermal-soc
2014-12-21 22:49:12 +08:00
PM / sleep: Make it possible to quiesce timers during suspend-to-idle
2015-02-15 19:40:09 +01:00
Merge branch 'fortglx/3.19-stable/time' of https://git.linaro.org/people/john.stultz/linux into timers/urgent
2015-01-22 12:28:02 +01:00
timecounter: provide a macro to initialize the cyclecounter mask field.
2015-01-02 16:47:35 -05:00
time: Expose get_monotonic_boottime64 for in-kernel use
2015-01-23 17:21:55 -08:00
tracing: Add condition check to RCU lockdep checks
2015-02-07 19:34:25 -05:00
linux/types.h: Always use unsigned long for pgoff_t
2015-02-12 18:54:13 -08:00
ip: Move checksum convert defines to inet
2015-01-05 22:44:46 -05:00
vhost: vhost_scsi_handle_vq() should just use copy_from_user()
2015-02-04 01:34:16 -05:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
2014-12-17 12:31:40 -08:00
A balloon enhancement, and a minor race-on-module-unload theoretical
2014-12-17 10:37:56 -08:00
virtio: memory access APIs
2014-12-09 12:05:24 +02:00
virtio: core support for config generation
2014-12-14 18:21:31 +02:00
mm,vmacache: count number of system-wide flushes
2014-12-13 12:42:48 -08:00
vmci: propagate msghdr all way down to __qp_memcpy_to_queue()
2015-02-04 01:34:14 -05:00
vringh: update for virtio 1.0 APIs
2014-12-15 23:49:28 +02:00
Merge branch 'for-3.20/drivers' of git://git.kernel.dk/linux-block
2015-02-12 14:30:53 -08:00
workqueue.h: remove loops of single statement macros
2015-01-06 18:16:30 -05:00
mm: protect set_page_dirty() from ongoing truncation
2015-01-08 15:10:51 -08:00
mm/zpool: add name argument to create zpool
2015-02-12 18:54:12 -08:00
mm/zpool: add name argument to create zpool
2015-02-12 18:54:12 -08:00
