Enable the perf exclude_idle event attribute to avoid waking
possilby sleeping CPUS. The counter values are updated when CPU
enters idle. If the CPU is idle when perf reads the current
event value (of an exclude idle event) then the value from
when the CPU went idle is returned.
This commit supercedes the commits below. The context for the
commits below changed too much to enable cherry-picking.
commit 573979dee2a7 ("perf: Add support for exclude_idle attribute")
commit 54f6e4ae87be ("perf: Enable updating exclude_idle events
at idle")
commit 960dbb1751f3 ("perf: Skip permission checks on kernel owned
perf events")
Change-Id: Ib554c9fe106963ec1b42e72aeaf84fc73201bbb7
Signed-off-by: Patrick Fay <pfay@codeaurora.org>
In ipc_log_string() the return value from vsnprintf(), data_size,
is used to increment ectxt.offset. However, this length could
actually be much larger than that of ectxt.buff itself. This is a
typical mistake of [v]snprintf() usage [1], in that it returns
not the number of characters written but how many characters
*would* have been written regardless of whether it was truncated.
The result is that even though ectxt.buff itself is not overrun,
the incorrect size in ectxt.offset will be later used as the length
parameter when memcpy()'ing to the ipc_log_page's data, overflowing
that memory and beyond. The write_page's write_offset would also
indicate an out-of-bounds (greater than PAGE_SIZE) length.
The fix is simple: use vscnprintf() instead of vsnprintf().
[1] https://lwn.net/Articles/69419/
Change-Id: I2e9d44e74f5f30a009732e31a554d82e31946999
Signed-off-by: Jack Pham <jackp@codeaurora.org>
Currently perf hardware, software and tracepoint events are
deleted when a cpu is hotplugged out. This change restarts
the events after hotplug. In arm_pmu.c most of the code
for handline power collapse is reused for hotplug.
This change supercedes commit 1f0f95c5fe9e ("perf: add hotplug
support so that perf continues after hotplug") and uses the
new hotplug notification method.
Change-Id: Ia9de1c150558125e2da5f2c4354c268ce4b1154a
Signed-off-by: Patrick Fay <pfay@codeaurora.org>
* 4.9/tmp-c96f651:
Linux 4.9.20
usb: musb: fix possible spinlock deadlock
sched/rt: Add a missing rescheduling point
fscrypt: remove broken support for detecting keyring key revocation
metag/ptrace: Reject partial NT_METAG_RPIPE writes
metag/ptrace: Provide default TXSTATUS for short NT_PRSTATUS
metag/ptrace: Preserve previous registers for short regset write
sparc/ptrace: Preserve previous registers for short regset write
mips/ptrace: Preserve previous registers for short regset write
h8300/ptrace: Fix incorrect register transfer count
c6x/ptrace: Remove useless PTRACE_SETREGSET implementation
pinctrl: qcom: Don't clear status bit on irq_unmask
virtio_balloon: init 1st buffer in stats vq
KVM: x86: cleanup the page tracking SRCU instance
xfrm_user: validate XFRM_MSG_NEWAE incoming ESN size harder
xfrm_user: validate XFRM_MSG_NEWAE XFRMA_REPLAY_ESN_VAL replay_window
xfrm: policy: init locks early
ANDROID: ARM64: Allow to choose appended kernel image
Linux 4.9.19
crypto: algif_hash - avoid zero-sized array
fbcon: Fix vc attr at deinit
drm: reference count event->completion
nl80211: fix dumpit error path RTNL deadlocks
drm/bridge: analogix dp: Fix runtime PM state on driver bind
device-dax: fix pmd/pte fault fallback handling
libceph: don't set weight to IN when OSD is destroyed
Drivers: hv: vmbus: Don't leak memory when a channel is rescinded
Drivers: hv: vmbus: Don't leak channel ids
intel_th: Don't leak module refcount on failure to activate
jbd2: don't leak memory if setting up journal fails
auxdisplay: img-ascii-lcd: add missing sentinel entry in img_ascii_lcd_matches
drm/amdgpu: reinstate oland workaround for sclk
blk-mq: don't complete un-started request in timeout handler
cgroup, net_cls: iterate the fds of only the tasks which are being migrated
cpufreq: Restore policy min/max limits on CPU online
arm64: kaslr: Fix up the kernel image alignment
ARM: at91: pm: cpu_idle: switch DDR to power-down mode
Revert "ARM: at91/dt: sama5d2: Use new compatible for ohci node"
iommu/vt-d: Fix NULL pointer dereference in device_to_iommu
xen/acpi: upload PM state from init-domain to Xen
crypto: ccp - Assign DMA commands to the channel's CCP
mwifiex: pcie: don't leak DMA buffers when removing
clk: sunxi-ng: mp: Adjust parent rate for pre-dividers
clk: sunxi-ng: sun6i: Fix enable bit offset for hdmi-ddc module clock
hwrng: geode - Revert managed API changes
hwrng: amd - Revert managed API changes
mmc: sdhci-pci: Do not disable interrupts in sdhci_intel_set_power
mmc: sdhci: Do not disable interrupts while waiting for clock
mmc: sdhci-of-arasan: fix incorrect timeout clock
mmc: sdhci-of-at91: Support external regulators
powerpc/64s: Fix idle wakeup potential to clobber registers
ext4: lock the xattr block before checksuming it
ext4: mark inode dirty after converting inline directory
parport: fix attempt to write duplicate procfiles
iio: magnetometer: ak8974: remove incorrect __exit markups
iio: hid-sensor-trigger: Change get poll value function order to avoid sensor properties losing after resume from S3
iio: sw-device: Fix config group initialization
iio: adc: ti_am335x_adc: fix fifo overrun recovery
mmc: ushc: fix NULL-deref at probe
uwb: hwa-rc: fix NULL-deref at probe
uwb: i1480-dfu: fix NULL-deref at probe
USB: usbtmc: fix probe error path
USB: usbtmc: add missing endpoint sanity check
usb: hub: Fix crash after failure to read BOS descriptor
usb: musb: cppi41: don't check early-TX-interrupt for Isoch transfer
USB: wusbcore: fix NULL-deref at probe
USB: idmouse: fix NULL-deref at probe
USB: lvtest: fix NULL-deref at probe
USB: uss720: fix NULL-deref at probe
usb-core: Add LINEAR_FRAME_INTR_BINTERVAL USB quirk
usb: gadget: f_uvc: Fix SuperSpeed companion descriptor's wBytesPerInterval
ACM gadget: fix endianness in notifications
USB: serial: qcserial: add Dell DW5811e
USB: serial: option: add Quectel UC15, UC20, EC21, and EC25 modems
ALSA: hda - Adding a group of pin definition to fix headset problem
ALSA: ctxfi: Fix the incorrect check of dma_set_mask() call
ALSA: seq: Fix racy cell insertions during snd_seq_pool_done()
Input: sur40 - validate number of endpoints before using them
Input: kbtab - validate number of endpoints before using them
Input: cm109 - validate number of endpoints before using them
Input: yealink - validate number of endpoints before using them
Input: hanwang - validate number of endpoints before using them
Input: ims-pcu - validate number of endpoints before using them
Input: iforce - validate number of endpoints before using them
Input: i8042 - add noloop quirk for Dell Embedded Box PC 3000
Input: elan_i2c - add ASUS EeeBook X205TA special touchpad fw
Input: ALPS - fix trackstick button handling on V8 devices
Input: ALPS - fix V8+ protocol handling (73 03 28)
tcp: initialize icsk_ack.lrcvtime at session start time
socket, bpf: fix sk_filter use after free in sk_clone_lock
ipv4: provide stronger user input validation in nl_fib_input()
net: bcmgenet: remove bcmgenet_internal_phy_setup()
ipv6: make sure to initialize sockc.tsflags before first use
net/mlx5e: Count LRO packets correctly
net/mlx5e: Count GSO packets correctly
net/mlx5: Increase number of max QPs in default profile
net/mlx5e: Use the proper UAPI values when offloading TC vlan actions
net/mlx5: Add missing entries for set/query rate limit commands
net: vrf: Reset rt6i_idev in local dst after put
qmi_wwan: add Dell DW5811e
net: unix: properly re-increment inflight counter of GC discarded candidates
openvswitch: Add missing case OVS_TUNNEL_KEY_ATTR_PAD
amd-xgbe: Fix jumbo MTU processing on newer hardware
net: properly release sk_frag.page
net: bcmgenet: Do not suspend PHY if Wake-on-LAN is enabled
net/openvswitch: Set the ipv6 source tunnel key address attribute correctly
Change-Id: I83a11caf9ef417ddfc78b8ed688d10d8e3c9cb1a
Signed-off-by: Kyle Yan <kyan@codeaurora.org>
There's no use reporting load more than once in a window
via the cpufreq_update_util path (unless there's a migration).
Set the load_reported_window flag in sched_get_cpus_busy
to remove these redundant updates.
Change-Id: If43dd5abc7e0e52a8e0f0df3a20ca99ed92f5361
Signed-off-by: Vikram Mulukutla <markivx@codeaurora.org>
commit 619bd4a71874a8fd78eb6ccf9f272c5e98bcc7b7 upstream.
Since the change in commit:
fd7a4bed18 ("sched, rt: Convert switched_{from, to}_rt() / prio_changed_rt() to balance callbacks")
... we don't reschedule a task under certain circumstances:
Lets say task-A, SCHED_OTHER, is running on CPU0 (and it may run only on
CPU0) and holds a PI lock. This task is removed from the CPU because it
used up its time slice and another SCHED_OTHER task is running. Task-B on
CPU1 runs at RT priority and asks for the lock owned by task-A. This
results in a priority boost for task-A. Task-B goes to sleep until the
lock has been made available. Task-A is already runnable (but not active),
so it receives no wake up.
The reality now is that task-A gets on the CPU once the scheduler decides
to remove the current task despite the fact that a high priority task is
enqueued and waiting. This may take a long time.
The desired behaviour is that CPU0 immediately reschedules after the
priority boost which made task-A the task with the lowest priority.
Suggested-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Fixes: fd7a4bed18 ("sched, rt: Convert switched_{from, to}_rt() prio_changed_rt() to balance callbacks")
Link: http://lkml.kernel.org/r/20170124144006.29821-1-bigeasy@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Sebastian Andrzej Siewiorauthored and Greg Kroah-Hartmancommited 2017-03-31 10:31:46 +02:00
Since HMP uses WALT, ensure that load is reported just once per window,
with the exception of intercluster migrations. Further, try to report load
whenever WALT stats are updated.
Change-Id: I6539f8c916f6f271cf26f03249de7f953d5b12c2
Signed-off-by: Vikram Mulukutla <markivx@codeaurora.org>
Vikram Mulukutlaauthored and Rohit Guptacommited 2017-03-29 17:20:06 -07:00
Data corruptions in the kernel often end up in system crashes that
are easier to debug closer to the time of detection. Specifically,
if we do not panic immediately after lock or list corruptions have been
detected, the problem context is lost in the ensuing system mayhem.
Add support for allowing system crash immediately after such corruptions
are detected. The CONFIG option controls the enabling/disabling of the
feature.
Change-Id: I9b2eb62da506a13007acff63e85e9515145909ff
Signed-off-by: Syed Rameez Mustafa <rameezmustafa@codeaurora.org>
Signed-off-by: Patrick Daly <pdaly@codeaurora.org>
Syed Rameez Mustafaauthored and Patrick Dalycommited 2017-03-29 13:02:14 -07:00
* 4.9/tmp-82ab074:
Linux 4.9.17
crypto: powerpc - Fix initialisation of crc32c context
locking/rwsem: Fix down_write_killable() for CONFIG_RWSEM_GENERIC_SPINLOCK=y
futex: Add missing error handling to FUTEX_REQUEUE_PI
futex: Fix potential use-after-free in FUTEX_REQUEUE_PI
x86/perf: Fix CR4.PCE propagation to use active_mm instead of mm
x86/kasan: Fix boot with KASAN=y and PROFILE_ANNOTATED_BRANCHES=y
x86/tsc: Fix ART for TSC_KNOWN_FREQ
irqchip/gicv3-its: Add workaround for QDF2400 ITS erratum 0065
arm64: KVM: VHE: Clear HCR_TGE when invalidating guest TLBs
drm/vc4: Fix ->clock_select setting for the VEC encoder
drm/vc4: Fix race between page flip completion event and clean-up
clk: bcm2835: Fix ->fixed_divider of pllh_aux
powerpc/mm: Fix build break when CMA=n && SPAPR_TCE_IOMMU=y
usb: gadget: udc: atmel: remove memory leak
serial: 8250_pci: Detach low-level driver during PCI error recovery
ACPI / blacklist: Make Dell Latitude 3350 ethernet work
ACPI / blacklist: add _REV quirks for Dell Precision 5520 and 3520
slub: move synchronize_sched out of slab_mutex on shrink
uvcvideo: uvc_scan_fallback() for webcams with broken chain
s390/zcrypt: Introduce CEX6 toleration
block: allow WRITE_SAME commands with the SG_IO ioctl
drm/nouveau/disp/nv50-: specify ctrl/user separately when constructing classes
drm/nouveau/disp/nv50-: split chid into chid.ctrl and chid.user
drm/nouveau/disp/gp102: fix cursor/overlay immediate channel indices
vfio/spapr: Postpone default window creation
vfio/spapr: Add a helper to create default DMA window
powerpc/mm/iommu, vfio/spapr: Put pages on VFIO container shutdown
vfio/spapr: Reference mm in tce_container
powerpc/iommu: Stop using @current in mm_iommu_xxx
powerpc/iommu: Pass mm_struct to init/cleanup helpers
vfio/spapr: Postpone allocation of userspace version of TCE table
Drivers: hv: ring_buffer: count on wrap around mappings in get_next_pkt_raw() (v2)
ibmveth: calculate gso_segs for large packets
PCI: Do any VF BAR updates before enabling the BARs
PCI: Ignore BAR updates on virtual functions
PCI: Update BARs using property bits appropriate for type
PCI: Don't update VF BARs while VF memory space is enabled
PCI: Decouple IORESOURCE_ROM_ENABLE and PCI_ROM_ADDRESS_ENABLE
PCI: Add comments about ROM BAR updating
PCI: Remove pci_resource_bar() and pci_iov_resource_bar()
PCI: Separate VF BAR updates from standard BAR updates
x86/hyperv: Handle unknown NMIs on one CPU when unknown_nmi_panic
scsi: ibmvscsis: Synchronize cmds at remove time
scsi: ibmvscsis: Synchronize cmds at tpg_enable_store time
scsi: ibmvscsis: Rearrange functions for future patches
scsi: ibmvscsis: Clean up properly if target_submit_cmd/tmr fails
scsi: ibmvscsis: Return correct partition name/# to client
scsi: ibmvscsis: Issues from Dan Carpenter/Smatch
igb: add i211 to i210 PHY workaround
igb: Workaround for igb i210 firmware issue
xen: do not re-use pirq number cached in pci device msi msg data
dmaengine: iota: ioat_alloc_chan_resources should not perform sleeping allocations.
bpf: fix mark_reg_unknown_value for spilled regs on map value marking
bpf: fix regression on verifier pruning wrt map lookups
bpf: fix state equivalence
bpf: Detect identical PTR_TO_MAP_VALUE_OR_NULL registers
dccp: fix memory leak during tear-down of unsuccessful connection request
tun: fix premature POLLOUT notification on tun devices
dccp/tcp: fix routing redirect race
bridge: drop netfilter fake rtable unconditionally
ipv6: avoid write to a possibly cloned skb
ipv6: make ECMP route replacement less greedy
mpls: Do not decrement alive counter for unregister events
mpls: Send route delete notifications when router module is unloaded
act_connmark: avoid crashing on malformed nlattrs with null parms
uapi: fix linux/packet_diag.h userspace compilation error
net/tunnel: set inner protocol in network gro hooks
vrf: Fix use-after-free in vrf_xmit
dccp: fix use-after-free in dccp_feat_activate_values
net/sched: act_skbmod: remove unneeded rcu_read_unlock in tcf_skbmod_dump
net: fix socket refcounting in skb_complete_tx_timestamp()
net: fix socket refcounting in skb_complete_wifi_ack()
tcp: fix various issues for sockets morphing to listen state
strparser: destroy workqueue on module exit
dccp: Unlock sock before calling sk_free()
ipv6: orphan skbs in reassembly unit
net: net_enable_timestamp() can be called from irq contexts
net: don't call strlen() on the user buffer in packet_bind_spkt()
net: bridge: allow IPv6 when multicast flood is disabled
tcp/dccp: block BH for SYN processing
mlxsw: spectrum_router: Avoid potential packets loss
geneve: lock RCU on TX path
vxlan: lock RCU on TX path
net: phy: Avoid deadlock during phy_error()
l2tp: avoid use-after-free caused by l2tp_ip_backlog_recv
net sched actions: decrement module reference count after table flush.
ipv4: mask tos for input route
vxlan: don't allow overwrite of config src addr
vti6: return GRE_KEY for vti6
vxlan: correctly validate VXLAN ID against VXLAN_N_VID
net/mlx5e: Fix wrong CQE decompression
net/mlx5e: Do not reduce LRO WQE size when not using build_skb
net/mlx5e: Register/unregister vport representors on interface attach/detach
ANDROID: mmc: core: export emmc revision
ANDROID: sdcardfs: Fix gid issue
ANDROID: sdcardfs: Remove uninformative prints
ANDROID: sdcardfs: move path_put outside of spinlock
ANDROID: sdcardfs: Use case insensitive hash function
ANDROID: sdcardfs: declare MODULE_ALIAS_FS
ANDROID: sdcardfs: Get the blocksize from the lower fs
ANDROID: sdcardfs: Use d_invalidate instead of drop_recurisve
ANDROID: sdcardfs: Switch to internal case insensitive compare
ANDROID: sdcardfs: Use spin_lock_nested
ANDROID: sdcardfs: Replace get/put with d_lock
ANDROID: sdcardfs: rate limit warning print
ANDROID: sdcardfs: Fix case insensitive lookup
ANDROID: sdcardfs: support direct-IO (DIO) operations
ANDROID: sdcardfs: implement vm_ops->page_mkwrite
ANDROID: sdcardfs: Don't bother deleting freelist
ANDROID: sdcardfs: Add missing path_put
ANDROID: sdcardfs: Fix incorrect hash
ANDROID: export security_path_chown
ANDROID: sdcardfs: Switch strcasecmp for internal call
ANDROID: sdcardfs: switch to full_name_hash and qstr
ANDROID: sdcardfs: Add GID Derivation to sdcardfs
ANDROID: sdcardfs: Remove redundant operation
ANDROID: sdcardfs: add support for user permission isolation
ANDROID: sdcardfs: Refactor configfs interface
ANDROID: sdcardfs: Allow non-owners to touch
ANDROID: binder: add padding to binder_fd_array_object.
ANDROID: binder: use group leader instead of open thread
BACKPORT: mmc: core: Export device lifetime information through sysfs
ANDROID: android-verity: do not compile as independent module
Change-Id: I7d409ec3e84eaa7f499c951d38f4cba2614415f7
Signed-off-by: Kyle Yan <kyan@codeaurora.org>
core_ctl can be completely disabled from a kernel parameter now.
Add a check to bail out early from the boost API.
Change-Id: Ib825500b0cb2c06af2cfcb82e5d79f91e9dd7b3b
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
Add a kernel parameter called "core_ctl_disable_cpumask" to
specify the CPUs for which core_ctl is not needed. As
core_ctl operates on a cluster basis, all of the CPUs in a
given cluster must be specified to disable core_ctl on that
cluster.
Change-Id: Idfdc5b3aa9f54bafe20489e5ded9d96da6eff21c
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
There is no need to call core_ctl_check() from scheduler tick path
on all CPUs. This results in core_ctl's state_lock spin lock
contention. Assign this job to the CPU which is responsible
for updating the ticks.
Change-Id: I9664037cc25c204d532bdd0f006c7e27ef143497
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
commit 1d18c2747f937f1b5ec65ce6bf4ccb9ca1aea9e8 upstream.
pids_can_fork() is special in that the css association is guaranteed
to be stable throughout the function and thus doesn't need RCU
protection around task_css access. When determining the css to charge
the pid, task_css_check() is used to override the RCU sanity check.
While adding a warning message on fork rejection from pids limit,
135b8b37bd ("cgroup: Add pids controller event when fork fails
because of pid limit") incorrectly added a task_css access which is
neither RCU protected or explicitly annotated. This triggers the
following suspicious RCU usage warning when RCU debugging is enabled.
cgroup: fork rejected by pids controller in
===============================
[ ERR: suspicious RCU usage. ]
4.10.0-work+ #1 Not tainted
-------------------------------
./include/linux/cgroup.h:435 suspicious rcu_dereference_check() usage!
other info that might help us debug this:
rcu_scheduler_active = 2, debug_locks = 0
1 lock held by bash/1748:
#0: (&cgroup_threadgroup_rwsem){+++++.}, at: [<ffffffff81052c96>] _do_fork+0xe6/0x6e0
stack backtrace:
CPU: 3 PID: 1748 Comm: bash Not tainted 4.10.0-work+ #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.9.3-1.fc25 04/01/2014
Call Trace:
dump_stack+0x68/0x93
lockdep_rcu_suspicious+0xd7/0x110
pids_can_fork+0x1c7/0x1d0
cgroup_can_fork+0x67/0xc0
copy_process.part.58+0x1709/0x1e90
_do_fork+0xe6/0x6e0
SyS_clone+0x19/0x20
do_syscall_64+0x5c/0x140
entry_SYSCALL64_slow_path+0x25/0x25
RIP: 0033:0x7f7853fab93a
RSP: 002b:00007ffc12d05c90 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f7853fab93a
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 00007ffc12d05cc0 R08: 0000000000000000 R09: 00007f78548db700
R10: 00007f78548db9d0 R11: 0000000000000246 R12: 00000000000006d4
R13: 0000000000000001 R14: 0000000000000000 R15: 000055e3ebe2c04d
/asdf
There's no reason to dereference task_css again here when the
associated css is already available. Fix it by replacing the
task_cgroup() call with css->cgroup.
Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: Mike Galbraith <efault@gmx.de>
Fixes: 135b8b37bd ("cgroup: Add pids controller event when fork fails because of pid limit")
Cc: Kenny Yu <kennyyu@fb.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Tejun Heoauthored and Greg Kroah-Hartmancommited 2017-03-26 13:05:58 +02:00
commit e7cc4865f0f31698ef2f7aac01a50e78968985b7 upstream.
While hunting for clues to a use-after-free, Oleg spotted that
perf_event_init_context() can loose an error value with the result
that fork() can succeed even though we did not fully inherit the perf
event context.
Spotted-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Cc: oleg@redhat.com
Fixes: 889ff01506 ("perf/core: Split context's event group list into pinned and non-pinned lists")
Link: http://lkml.kernel.org/r/20170316125823.190342547@infradead.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Peter Zijlstraauthored and Greg Kroah-Hartmancommited 2017-03-26 13:05:57 +02:00
The scheduler needs to do some book-keeping when a task exits.
Call the scheduler hook sched_exit() that takes care of all of
that necessary book-keeping.
Change-Id: I551aead70248b06f9d918e6d032075d6ecaa7fed
Signed-off-by: Syed Rameez Mustafa <rameezmustafa@codeaurora.org>
When an upmigrate ineligible task running on the maximum capacity CPU,
we check if it can be migrated to a lower capacity CPU in tick path.
Add a power cost based check there to prevent the task migration
from a power efficient CPU.
Change-Id: I291c62d7dbf169d5123faba5f5246ad44a7a40dd
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
Pavankumar Kondetiauthored and Gerrit - the friendly Code Review servercommited 2017-03-24 10:55:25 -07:00
Compute the CPU search mask once by taking task affinity,
cpu_active_mask and cpu_isolated_mask into account and cache
it in cpu_selection_env. This prevents doing the same cpumask
operations multiple times.
Change-Id: I78f35c59e6ee9437b3a522ac7ad856c0251f81ec
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
Pavankumar Kondetiauthored and Gerrit - the friendly Code Review servercommited 2017-03-24 10:55:16 -07:00
In select_best_cpu(), if no CPU is selected from the candidate
cluster, the search is expanded to the backup cluster. The
current code may select an inactive/isolated CPU in the
backup cluster. Fix this.
Change-Id: Id1e8a2b2f84ea274cdeda408957490ca05ef5fdb
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
Pavankumar Kondetiauthored and Gerrit - the friendly Code Review servercommited 2017-03-24 10:55:10 -07:00
When update_task_ravg() is called with the TASK_UPDATE event on a task
that is not on the runqueue, task demand accounting incorrectly treats
the time delta as execution time. This can happen when a sleeping
task is moved to/from colocation groups. This phantom execution time can
cause unpredictable changes to demand that in turn can result in
incorrect task placement. Fix the issue by adding special handling of
TASK_UPDATE in task demand accounting. CPU busy time accounting already
has all the necessary checks.
Change-Id: Ibb42d83ac353bf2e849055fa3cb5c22e7acd56de
Signed-off-by: Syed Rameez Mustafa <rameezmustafa@codeaurora.org>
Syed Rameez Mustafaauthored and Gerrit - the friendly Code Review servercommited 2017-03-24 10:54:02 -07:00
When a qos request is added with IRQ affinity, irq notifier
for that irq is added and with out disabling the irq
notifier if the irq is free it is through a warning.
So disable irq notifier when the qos request is removed.
Change-Id: I50faa4ecbe1b632c0f0f203ca52faf18753c33d4
Signed-off-by: Srinivas Rao L <lsrao@codeaurora.org>
Srinivas Rao Lauthored and Gerrit - the friendly Code Review servercommited 2017-03-23 13:48:24 -07:00
Fix uninitialized variable warnings that were not previously caught by
old compiler.
Change-Id: I5014a235da41d32a3a1ae234286270ec9af875fc
Signed-off-by: Kyle Yan <kyan@codeaurora.org>
commit 17fcbd590d0c3e35bd9646e2215f86586378bc42 upstream.
We hang if SIGKILL has been sent, but the task is stuck in down_read()
(after do_exit()), even though no task is doing down_write() on the
rwsem in question:
INFO: task libupnp:21868 blocked for more than 120 seconds.
libupnp D 0 21868 1 0x08100008
...
Call Trace:
__schedule()
schedule()
__down_read()
do_exit()
do_group_exit()
__wake_up_parent()
This bug has already been fixed for CONFIG_RWSEM_XCHGADD_ALGORITHM=y in
the following commit:
04cafed7fc ("locking/rwsem: Fix down_write_killable()")
... however, this bug also exists for CONFIG_RWSEM_GENERIC_SPINLOCK=y.
Signed-off-by: Niklas Cassel <niklas.cassel@axis.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: <mhocko@suse.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Niklas Cassel <niklass@axis.com>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Fixes: d47996082f ("locking/rwsem: Introduce basis for down_write_killable()")
Link: http://lkml.kernel.org/r/1487981873-12649-1-git-send-email-niklass@axis.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Niklas Casselauthored and Greg Kroah-Hartmancommited 2017-03-22 12:43:40 +01:00
commit c236c8e95a3d395b0494e7108f0d41cf36ec107c upstream.
While working on the futex code, I stumbled over this potential
use-after-free scenario. Dmitry triggered it later with syzkaller.
pi_mutex is a pointer into pi_state, which we drop the reference on in
unqueue_me_pi(). So any access to that pointer after that is bad.
Since other sites already do rt_mutex_unlock() with hb->lock held, see
for example futex_lock_pi(), simply move the unlock before
unqueue_me_pi().
Reported-by: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Darren Hart <dvhart@linux.intel.com>
Cc: juri.lelli@arm.com
Cc: bigeasy@linutronix.de
Cc: xlpang@redhat.com
Cc: rostedt@goodmis.org
Cc: mathieu.desnoyers@efficios.com
Cc: jdesfossez@efficios.com
Cc: dvhart@infradead.org
Cc: bristot@redhat.com
Link: http://lkml.kernel.org/r/20170304093558.801744246@infradead.org
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Peter Zijlstraauthored and Greg Kroah-Hartmancommited 2017-03-22 12:43:40 +01:00
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