Jason A. Donenfeld
62cd795e46
random: clear fast pool, crng, and batches in cpuhp bring up
...
commit 3191dd5a1179ef0fad5a050a1702ae98b6251e8f upstream.
For the irq randomness fast pool, rather than having to use expensive
atomics, which were visibly the most expensive thing in the entire irq
handler, simply take care of the extreme edge case of resetting count to
zero in the cpuhp online handler, just after workqueues have been
reenabled. This simplifies the code a bit and lets us use vanilla
variables rather than atomics, and performance should be improved.
As well, very early on when the CPU comes up, while interrupts are still
disabled, we clear out the per-cpu crng and its batches, so that it
always starts with fresh randomness.
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Theodore Ts'o <tytso@mit.edu>
Cc: Sultan Alsawaf <sultan@kerneltoast.com>
Cc: Dominik Brodowski <linux@dominikbrodowski.net>
Acked-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-06-22 14:11:12 +02:00
..
bpf
bpf: Fix incorrect memory charge cost calculation in stack_map_alloc()
2022-06-22 14:11:02 +02:00
cgroup
cgroup/cpuset: Remove cpus_allowed/mems_allowed setup in cpuset_init_smp()
2022-05-18 09:47:27 +02:00
configs
debug
lockdown: also lock down previous kgdb use
2022-06-06 08:33:48 +02:00
dma
dma-debug: change allocation mode from GFP_NOWAIT to GFP_ATIOMIC
2022-06-14 18:11:28 +02:00
events
perf: Fix sys_perf_event_open() race against self
2022-05-25 09:14:34 +02:00
gcov
gcov: re-fix clang-11+ support
2021-04-14 08:24:10 +02:00
irq
random: remove unused irq_flags argument from add_interrupt_randomness()
2022-06-22 14:11:06 +02:00
livepatch
locking
locking/lockdep: Avoid RCU-induced noinstr fail
2021-11-17 09:48:28 +01:00
power
PM: suspend: fix return value of __setup handler
2022-04-15 14:18:05 +02:00
printk
printk: fix return value of printk.devkmsg __setup handler
2022-04-15 14:18:08 +02:00
rcu
rcu: Don't deboost before reporting expedited quiescent state
2022-03-28 08:46:48 +02:00
sched
sched/fair: Fix cfs_rq_clock_pelt() for throttled cfs_rq
2022-06-14 18:11:33 +02:00
time
tick/nohz: Use WARN_ON_ONCE() to prevent console saturation
2022-04-20 09:19:39 +02:00
trace
tracing: Avoid adding tracer option before update_tracer_options
2022-06-14 18:11:56 +02:00
.gitignore
kbuild: update config_data.gz only when the content of .config is changed
2021-05-11 14:04:16 +02:00
acct.c
async.c
Revert "module, async: async_synchronize_full() on module init iff async is used"
2022-02-23 11:59:56 +01:00
audit.c
audit: improve audit queue handling when "audit=1" on cmdline
2022-02-08 18:24:26 +01:00
audit.h
audit: log AUDIT_TIME_* records only from rules
2022-04-15 14:18:04 +02:00
audit_fsnotify.c
audit_tree.c
audit: move put_tree() to avoid trim_trees refcount underflow and UAF
2021-09-03 10:08:16 +02:00
audit_watch.c
audit: CONFIG_CHANGE don't log internal bookkeeping as an event
2020-10-01 13:17:32 +02:00
auditfilter.c
audit: fix a net reference leak in audit_list_rules_send()
2020-06-22 09:30:59 +02:00
auditsc.c
audit: log AUDIT_TIME_* records only from rules
2022-04-15 14:18:04 +02:00
backtracetest.c
bounds.c
capability.c
compat.c
configs.c
context_tracking.c
cpu.c
random: clear fast pool, crng, and batches in cpuhp bring up
2022-06-22 14:11:12 +02:00
cpu_pm.c
kernel/cpu_pm: Fix uninitted local in cpu_pm
2020-06-22 09:31:22 +02:00
crash_core.c
crash_dump.c
cred.c
delayacct.c
dma.c
exec_domain.c
exit.c
don't dump the threads that had been already exiting when zapped.
2020-11-18 19:20:31 +01:00
extable.c
fail_function.c
fail_function: Remove a redundant mutex unlock
2020-11-24 13:29:18 +01:00
fork.c
copy_process(): Move fd_install() out of sighand->siglock critical section
2022-02-23 12:00:00 +01:00
freezer.c
futex.c
mm, futex: fix shared futex pgoff on shmem huge page
2021-06-30 08:47:55 -04:00
gen_kheaders.sh
kbuild: add variables for compression tools
2020-09-03 11:27:10 +02:00
groups.c
hung_task.c
iomem.c
irq_work.c
jump_label.c
kallsyms.c
kallsyms: Refactor kallsyms_show_value() to take cred
2020-07-16 08:16:44 +02:00
kcmp.c
exec: Transform exec_update_mutex into a rw_semaphore
2021-01-09 13:44:55 +01:00
Kconfig.freezer
Kconfig.hz
Kconfig.locks
Kconfig.preempt
kcov.c
kexec.c
kexec_core.c
kernel: kexec: remove the lock operation of system_transition_mutex
2021-02-03 23:25:56 +01:00
kexec_elf.c
kexec_file.c
kernel: kexec_file: fix error return code of kexec_calculate_store_digests()
2021-05-19 10:08:28 +02:00
kexec_internal.h
kheaders.c
kmod.c
kmod: make request_module() return an error when autoloading is disabled
2020-04-17 10:50:22 +02:00
kprobes.c
kprobes: Limit max data_size of the kretprobe instances
2021-12-08 09:01:10 +01:00
ksysfs.c
kthread.c
kthread: Fix PF_KTHREAD vs to_kthread() race
2021-09-12 08:56:39 +02:00
latencytop.c
Makefile
kbuild: update config_data.gz only when the content of .config is changed
2021-05-11 14:04:16 +02:00
module-internal.h
module.c
module/ftrace: handle patchable-function-entry
2022-02-23 11:59:56 +01:00
module_signature.c
module: harden ELF info handling
2021-04-07 14:47:38 +02:00
module_signing.c
module: harden ELF info handling
2021-04-07 14:47:38 +02:00
notifier.c
kernel/notifier.c: intercept duplicate registrations to avoid infinite loops
2020-10-01 13:17:23 +02:00
nsproxy.c
padata.c
padata: add separate cpuhp node for CPUHP_PADATA_DEAD
2020-06-17 16:40:22 +02:00
panic.c
params.c
pid.c
pid_namespace.c
memcg: enable accounting for pids in nested pid namespaces
2021-09-22 12:26:37 +02:00
profile.c
profiling: fix shift-out-of-bounds bugs
2021-09-26 14:07:09 +02:00
ptrace.c
ptrace: Reimplement PTRACE_KILL by always sending SIGKILL
2022-06-14 18:11:24 +02:00
range.c
reboot.c
reboot: fix overflow parsing reboot cpu number
2020-11-18 19:20:30 +01:00
relay.c
kernel/relay.c: fix memleak on destroy relay channel
2020-08-26 10:40:51 +02:00
resource.c
/dev/mem: Revoke mappings when a driver claims the region
2020-06-24 17:50:35 +02:00
rseq.c
seccomp.c
seccomp: Invalidate seccomp mode to catch death failures
2022-02-16 12:52:53 +01:00
signal.c
signal: Remove the bogus sigkill_pending in ptrace_stop
2021-11-17 09:48:24 +01:00
smp.c
smp: Fix offline cpu check in flush_smp_call_function_queue()
2022-04-20 09:19:39 +02:00
smpboot.c
kthread: Extract KTHREAD_IS_PER_CPU
2021-02-07 15:35:49 +01:00
smpboot.h
softirq.c
stackleak.c
stacktrace.c
stop_machine.c
sys.c
prctl: allow to setup brk for et_dyn executables
2021-09-26 14:07:08 +02:00
sys_ni.c
sysctl-test.c
kernel/sysctl-test: Add null pointer test for sysctl.c:proc_dointvec()
2020-10-01 13:17:10 +02:00
sysctl.c
x86/speculation: Include unprivileged eBPF status in Spectre v2 mitigation reporting
2022-03-11 11:22:37 +01:00
sysctl_binary.c
task_work.c
taskstats.c
test_kprobes.c
torture.c
tracepoint.c
tracepoint: Add tracepoint_probe_register_may_exist() for BPF tracing
2021-07-14 16:53:08 +02:00
tsacct.c
taskstats: Cleanup the use of task->exit_code
2022-02-23 11:59:57 +01:00
ucount.c
uid16.c
uid16.h
umh.c
usermodehelper: reset umask to default before executing user process
2020-10-14 10:32:58 +02:00
up.c
smp: Fix smp_call_function_single_async prototype
2021-05-14 09:44:33 +02:00
user-return-notifier.c
user.c
user_namespace.c
utsname.c
utsname_sysctl.c
watchdog.c
watchdog/softlockup: Enforce that timestamp is valid on boot
2020-02-24 08:36:52 +01:00
watchdog_hld.c
workqueue.c
workqueue: Fix unbind_workers() VS wq_worker_running() race
2022-01-16 09:15:38 +01:00
workqueue_internal.h