Juri Lelli
99d2926531
sched/features: Fix hrtick reprogramming ...
[ Upstream commit 156ec6f42b8d300dbbf382738ff35c8bad8f4c3a ]
Hung tasks and RCU stall cases were reported on systems which were not
100% busy. Investigation of such unexpected cases (no sign of potential
starvation caused by tasks hogging the system) pointed out that the
periodic sched tick timer wasn't serviced anymore after a certain point
and that caused all machinery that depends on it (timers, RCU, etc.) to
stop working as well. This issues was however only reproducible if
HRTICK was enabled.
Looking at core dumps it was found that the rbtree of the hrtimer base
used also for the hrtick was corrupted (i.e. next as seen from the base
root and actual leftmost obtained by traversing the tree are different).
Same base is also used for periodic tick hrtimer, which might get "lost"
if the rbtree gets corrupted.
Much alike what described in commit 1f71addd34https://lkml.kernel.org/r/20210208073554.14629-2-juri.lelli@redhat.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-03-07 12:20:47 +01:00
bpf_lru_list: Read double-checked variable once without lock
2021-03-04 10:26:16 +01:00
cgroup: fix psi monitor for root cgroup
2021-02-17 10:35:14 +01:00
kdb: Make memory allocations more robust
2021-03-04 10:26:10 +01:00
swiotlb: fix "x86: Don't panic if can not alloc buffer for swiotlb"
2020-11-18 19:20:32 +01:00
exec: Transform exec_update_mutex into a rw_semaphore
2021-01-09 13:44:55 +01:00
gcov: add support for GCC 10.1
2020-09-17 13:47:56 +02:00
genirq/msi: Activate Multi-MSI early when MSI_FLAG_ACTIVATE_EARLY is set
2021-02-10 09:25:30 +01:00
rtmutex: Remove unused argument from rt_mutex_proxy_unlock()
2021-01-30 13:54:09 +01:00
PM: hibernate: flush swap writer after marking
2021-02-03 23:25:57 +01:00
printk: fix deadlock when kernel panic
2021-03-04 10:26:50 +01:00
rcu/nocb: Perform deferred wake up before last idle's need_resched() check
2021-03-04 10:26:47 +01:00
sched/features: Fix hrtick reprogramming
2021-03-07 12:20:47 +01:00
tick/sched: Remove bogus boot "safety" check
2021-01-06 14:48:40 +01:00
tracing: Check length before giving out the filter buffer
2021-02-17 10:35:14 +01:00
audit: fix a net reference leak in audit_list_rules_send()
2020-06-22 09:30:59 +02:00
audit: fix a net reference leak in audit_list_rules_send()
2020-06-22 09:30:59 +02:00
audit: CONFIG_CHANGE don't log internal bookkeeping as an event
2020-10-01 13:17:32 +02:00
audit: fix a net reference leak in audit_list_rules_send()
2020-06-22 09:30:59 +02:00
kernel/cpu: add arch override for clear_tasks_mm_cpumask() mm handling
2020-12-30 11:50:56 +01:00
kernel/cpu_pm: Fix uninitted local in cpu_pm
2020-06-22 09:31:22 +02:00
keys: Fix request_key() cache
2020-01-17 19:48:42 +01:00
don't dump the threads that had been already exiting when zapped.
2020-11-18 19:20:31 +01:00
extable: Add function to search only kernel exception table
2019-08-21 22:23:48 +10:00
fail_function: Remove a redundant mutex unlock
2020-11-24 13:29:18 +01:00
exec: Transform exec_update_mutex into a rw_semaphore
2021-01-09 13:44:55 +01:00
Revert "libata, freezer: avoid block device removal while system is frozen"
2019-10-06 09:11:37 -06:00
futex: Handle faults correctly for PI futexes
2021-01-30 13:54:10 +01:00
kbuild: add variables for compression tools
2020-09-03 11:27:10 +02:00
jump_label: Don't warn on __exit jump entries
2019-08-29 15:10:10 +01:00
kallsyms: Refactor kallsyms_show_value() to take cred
2020-07-16 08:16:44 +02:00
exec: Transform exec_update_mutex into a rw_semaphore
2021-01-09 13:44:55 +01:00
kexec_load: Disable at runtime if the kernel is locked down
2019-08-19 21:54:15 -07:00
kernel: kexec: remove the lock operation of system_transition_mutex
2021-02-03 23:25:56 +01:00
kexec_elf: support 32 bit ELF files
2019-09-06 23:58:44 +02:00
ima: Free IMA measurement buffer after kexec syscall
2021-03-04 10:26:25 +01:00
kmod: make request_module() return an error when autoloading is disabled
2020-04-17 10:50:22 +02:00
tracing/kprobe: Fix to support kretprobe events on unloaded modules
2021-02-13 13:52:54 +01:00
kthread: Extract KTHREAD_IS_PER_CPU
2021-02-07 15:35:49 +01:00
elfcore: fix building with clang
2021-01-23 15:57:55 +01:00
module: Ignore _GLOBAL_OFFSET_TABLE_ when warning for undefined symbols
2021-03-04 10:26:49 +01:00
kernel/notifier.c: intercept duplicate registrations to avoid infinite loops
2020-10-01 13:17:23 +02:00
padata: add separate cpuhp node for CPUHP_PADATA_DEAD
2020-06-17 16:40:22 +02:00
panic: ensure preemption is disabled during panic()
2019-10-07 15:47:19 -07:00
lockdown: Lock down module params that specify hardware parameters (eg. ioport)
2019-08-19 21:54:16 -07:00
ptrace: Set PF_SUPERPRIV when checking capability
2020-11-24 13:29:24 +01:00
reboot: fix overflow parsing reboot cpu number
2020-11-18 19:20:30 +01:00
kernel/relay.c: fix memleak on destroy relay channel
2020-08-26 10:40:51 +02:00
/dev/mem: Revoke mappings when a driver claims the region
2020-06-24 17:50:35 +02:00
seccomp: Add missing return in non-void function
2021-03-04 10:26:45 +01:00
ptrace: fix task_join_group_stop() for the case when current is traced
2020-11-10 12:37:24 +01:00
kthread: Extract KTHREAD_IS_PER_CPU
2021-02-07 15:35:49 +01:00
stacktrace: Don't skip first entry on noncurrent tasks
2019-11-04 21:19:25 +01:00
stop_machine: Avoid potential race behaviour
2019-10-17 12:47:12 +02:00
kernel/sys.c: avoid copying possible padding bytes in copy_to_user
2020-10-01 13:17:23 +02:00
kernel/sysctl-test: Add null pointer test for sysctl.c:proc_dointvec()
2020-10-01 13:17:10 +02:00
kernel: sysctl: make drop_caches write-only
2020-01-04 19:18:32 +01:00
taskstats: fix data-race
2020-01-09 10:19:54 +01:00
tracepoint: Do not fail unregistering a probe due to memory failure
2021-03-04 10:26:32 +01:00
usermodehelper: reset umask to default before executing user process
2020-10-14 10:32:58 +02:00
watchdog/softlockup: Enforce that timestamp is valid on boot
2020-02-24 08:36:52 +01:00
workqueue: Restrict affinity change to rescuer
2021-02-07 15:35:49 +01:00
99d2926531