Nicholas Piggin
07da741d48
sched/nohz: Run NOHZ idle load balancer on HK_FLAG_MISC CPUs ...
[ Upstream commit 9b019acb72e4b5741d88e8936d6f200ed44b66b2 ]
The NOHZ idle balancer runs on the lowest idle CPU. This can
interfere with isolated CPUs, so confine it to HK_FLAG_MISC
housekeeping CPUs.
HK_FLAG_SCHED is not used for this because it is not set anywhere
at the moment. This could be folded into HK_FLAG_SCHED once that
option is fixed.
The problem was observed with increased jitter on an application
running on CPU0, caused by NOHZ idle load balancing being run on
CPU1 (an SMT sibling).
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/20190412042613.28930-1-npiggin@gmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2019-05-31 06:46:14 -07:00
bpf: devmap: fix use-after-free Read in __dev_map_entry_free
2019-05-31 06:46:04 -07:00
cgroup/pids: turn cgroup_subsys->free() into cgroup_subsys->release() to fix the accounting
2019-04-05 22:33:13 +02:00
kconfig: tinyconfig: remove stale stack protector fixups
2018-06-15 07:15:28 +09:00
kdb: Don't back trace on a cpu that didn't round up
2019-02-12 19:47:19 +01:00
dma-direct: do not include SME mask in the DMA supported check
2019-01-13 09:51:05 +01:00
perf/core: Fix perf_event_disable_inatomic() race
2019-05-10 17:54:09 +02:00
gcov: remove CONFIG_GCOV_FORMAT_AUTODETECT
2018-06-08 18:56:02 +09:00
genirq: Prevent use-after-free and work list corruption
2019-05-10 17:54:10 +02:00
Merge branch 'for-4.19/upstream' into for-linus
2018-08-20 18:33:50 +02:00
locking/rwsem: Prevent decrement of reader count before increment
2019-05-22 07:37:34 +02:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
2018-10-12 12:35:02 +02:00
printk: Fix panic caused by passing log_buf_len to command line
2018-11-13 11:08:48 -08:00
kprobes: Prohibit probing on RCU debug routine
2019-04-05 22:33:08 +02:00
sched/nohz: Run NOHZ idle load balancer on HK_FLAG_MISC CPUs
2019-05-31 06:46:14 -07:00
timers/sched_clock: Prevent generic sched_clock wrap caused by tick_freeze()
2019-04-27 09:36:38 +02:00
tracing: Fix partial reading of trace event's id file
2019-05-25 18:23:32 +02:00
acct_on(): don't mess with freeze protection
2019-05-31 06:46:05 -07:00
kernel/async.c: revert "async: simplify lowest_in_progress()"
2018-02-06 18:32:44 -08:00
audit: use ktime_get_coarse_real_ts64() for timestamps
2018-07-17 14:45:08 -04:00
audit: track the owner of the command mutex ourselves
2018-02-23 11:22:22 -05:00
fsnotify: add fsnotify_add_inode_mark() wrappers
2018-05-18 14:58:22 +02:00
\n
2018-08-17 09:41:28 -07:00
audit: fix use-after-free in audit_add_watch
2018-07-18 11:43:36 -04:00
audit: rename FILTER_TYPE to FILTER_EXCLUDE
2018-06-19 10:39:54 -04:00
audit/stable-4.18 PR 20180814
2018-08-15 10:46:54 -07:00
kbuild: fix kernel/bounds.c 'W=1' warning
2018-11-13 11:08:47 -08:00
time: Enable get/put_compat_itimerspec64 always
2018-06-24 14:39:47 +02:00
cpu/speculation: Add 'mitigations=' cmdline option
2019-05-14 19:17:59 +02:00
kernel/crash_core.c: print timestamp using time64_t
2018-08-22 10:52:47 -07:00
delayacct: Use raw_spinlocks
2018-04-27 14:34:51 +02:00
proc: introduce proc_create_single{,_data}
2018-05-16 07:23:35 +02:00
proc: introduce proc_create_single{,_data}
2018-05-16 07:23:35 +02:00
cgroup/pids: turn cgroup_subsys->free() into cgroup_subsys->release() to fix the accounting
2019-04-05 22:33:13 +02:00
extable: Make init_kernel_text() global
2018-02-21 16:54:06 +01:00
bpf/error-inject/kprobes: Clear current_kprobe and enable preempt in kprobe
2018-06-21 12:33:19 +02:00
userfaultfd: use RCU to free the task struct when fork fails
2019-05-22 07:37:41 +02:00
PM / reboot: Eliminate race between reboot and suspend
2018-08-06 12:35:20 +02:00
locking/futex: Allow low-level atomic operations to return -EAGAIN
2019-05-10 17:54:11 +02:00
kernel: hung_task.c: disable on suspend
2019-04-20 09:16:02 +02:00
memremap: split devm_memremap_pages() and memremap() infrastructure
2018-05-15 23:08:33 -07:00
jump_label: Fix typo in warning message
2018-09-10 10:15:48 +02:00
kallsyms, x86: Export addresses of PTI entry trampolines
2018-08-14 19:12:29 -03:00
kconfig: include kernel/Kconfig.preempt from init/Kconfig
2018-08-02 08:06:54 +09:00
kernel/kcov.c: mark write_comp_data() as notrace
2019-02-12 19:47:20 +01:00
kexec: add call to LSM hook in original kexec_load syscall
2018-07-16 12:31:57 -07:00
kexec: yield to scheduler when loading kimage segments
2018-06-15 07:55:24 +09:00
treewide: Use array_size() in vzalloc()
2018-06-12 16:19:22 -07:00
kprobes: Fix error check when reusing optimized probes
2019-04-27 09:36:37 +02:00
Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2018-08-13 11:25:07 -07:00
kbuild: move bin2c back to scripts/ from scripts/basic/
2018-07-18 01:18:05 +09:00
mm, devm_memremap_pages: add MEMORY_DEVICE_PRIVATE support
2019-01-13 09:51:04 +01:00
modsign: log module name in the event of an error
2018-07-02 11:36:17 +02:00
x86/modules: Avoid breaking W^X while loading modules
2019-05-31 06:46:12 -07:00
modsign: log module name in the event of an error
2018-07-02 11:36:17 +02:00
panic: avoid deadlocks in re-entrant console drivers
2018-12-29 13:37:57 +01:00
kernel/params.c: downgrade warning for unsafe parameters
2018-04-11 10:28:37 -07:00
Fix failure path in alloc_pid()
2019-01-13 09:51:06 +01:00
Merge branch 'userns-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
2018-04-03 19:15:32 -07:00
ptrace: take into account saved_sigmask in PTRACE{GET,SET}SIGMASK
2019-05-04 09:20:22 +02:00
PM / reboot: Eliminate race between reboot and suspend
2018-08-06 12:35:20 +02:00
relay: check return of create_buf_file() properly
2019-03-13 14:02:35 -07:00
libnvdimm for 4.18
2018-06-08 17:21:52 -07:00
rseq: uapi: Declare rseq_cs field as union, update includes
2018-07-10 22:18:52 +02:00
audit/stable-4.18 PR 20180605
2018-06-06 16:34:00 -07:00
signal: Restore the stop PTRACE_EVENT_EXIT
2019-02-20 10:25:48 +01:00
cpu/hotplug: Fix "SMT disabled by BIOS" detection for KVM
2019-02-12 19:47:25 +01:00
smpboot: Remove cpumask from the API
2018-07-03 09:20:44 +02:00
nohz: Fix missing tick reprogram when interrupting an inline softirq
2018-08-03 15:52:10 +02:00
Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2018-08-13 11:25:07 -07:00
kernel/sys.c: remove duplicated include
2018-09-20 22:01:11 +02:00
Merge branch 'core-rseq-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2018-06-10 10:17:09 -07:00
kernel/sysctl.c: fix out-of-bounds access when setting file-max
2019-04-27 09:36:41 +02:00
staging: irda: remove remaining remants of irda code removal
2018-04-16 11:26:49 +02:00
pids: introduce find_get_task_by_vpid() helper
2018-02-06 18:32:46 -08:00
kprobes: Remove jprobe API implementation
2018-06-21 12:33:05 +02:00
torture: Keep old-school dmesg format
2018-06-25 11:30:10 -07:00
tracepoint: Fix tracepoint array element size mismatch
2018-10-17 15:35:29 -04:00
headers: untangle kmemleak.h from mm.h
2018-04-05 21:36:27 -07:00
fs: add do_fchownat(), ksys_fchown() helpers and ksys_{,l}chown() wrappers
2018-04-02 20:15:59 +02:00
kernel: provide ksys_*() wrappers for syscalls called by kernel/uid16.c
2018-04-02 20:15:30 +02:00
umh: fix race condition
2018-06-07 16:56:28 -04:00
userns: use irqsave variant of refcount_dec_and_lock()
2018-08-22 10:52:47 -07:00
userns: also map extents in the reverse map to kernel IDs
2018-11-13 11:09:00 -08:00
uts: create "struct uts_namespace" from kmem_cache
2018-04-11 10:28:35 -07:00
sys: don't hold uts_sem while accessing userspace memory
2018-08-11 02:05:53 -05:00
watchdog: Respect watchdog cpumask on CPU hotplug
2019-04-03 06:26:29 +02:00
watchdog: Mark watchdog touch functions as notrace
2018-08-30 12:56:40 +02:00
workqueue: Try to catch flush_work() without INIT_WORK().
2019-05-02 09:58:56 +02:00
workqueue: Set worker->desc to workqueue name by default
2018-05-18 08:47:13 -07:00
07da741d48