Repository files (latest commit first)

Filename	Latest commit message	Latest commit date
Jinliang Zheng 25ab2411cb mm: optimize the redundant loop of mm_update_owner_next() ... commit cf3f9a593dab87a032d2b6a6fb205e7f3de4f0a1 upstream. When mm_update_owner_next() is racing with swapoff (try_to_unuse()) or /proc or ptrace or page migration (get_task_mm()), it is impossible to find an appropriate task_struct in the loop whose mm_struct is the same as the target mm_struct. If the above race condition is combined with the stress-ng-zombie and stress-ng-dup tests, such a long loop can easily cause a Hard Lockup in write_lock_irq() for tasklist_lock. Recognize this situation in advance and exit early. Link: https://lkml.kernel.org/r/20240620122123.3877432-1-alexjlzheng@tencent.com Signed-off-by: Jinliang Zheng <alexjlzheng@tencent.com> Acked-by: Michal Hocko <mhocko@suse.com> Cc: Christian Brauner <brauner@kernel.org> Cc: Jens Axboe <axboe@kernel.dk> Cc: Mateusz Guzik <mjguzik@gmail.com> Cc: Matthew Wilcox (Oracle) <willy@infradead.org> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Tycho Andersen <tandersen@netflix.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2024-07-18 11:40:51 +02:00
..
bpf
cgroup	sched/fair: Allow disabling sched_balance_newidle with sched_relax_domain_level	2024-06-16 13:28:41 +02:00
configs
debug	kdb: Use format-specifiers rather than memset() for padding in kdb_read()	2024-06-16 13:28:52 +02:00
dma
events	perf/core: Fix missing wakeup when waiting for context reference	2024-07-05 09:08:25 +02:00
gcov	gcov: add support for GCC 14	2024-07-05 09:08:24 +02:00
irq	genirq/cpuhotplug, x86/vector: Prevent vector leak during CPU offline	2024-06-16 13:28:48 +02:00
livepatch
locking
power
printk
rcu	rcutorture: Fix rcu_torture_one_read() pipe_count overflow comment	2024-07-05 09:08:20 +02:00
sched	sched/fair: Allow disabling sched_balance_newidle with sched_relax_domain_level	2024-06-16 13:28:41 +02:00
time	tick/nohz_full: Don't abuse smp_call_function_single() in tick_setup_device()	2024-07-05 09:08:19 +02:00
trace	tracing: Add MODULE_DESCRIPTION() to preemptirq_delay_test	2024-07-05 09:08:25 +02:00
.gitignore
acct.c
async.c
audit.c
audit.h
audit_fsnotify.c
audit_tree.c
audit_watch.c
auditfilter.c
auditsc.c
backtracetest.c
bounds.c	bounds: Use the right number of bits for power-of-two CONFIG_NR_CPUS	2024-05-02 16:18:37 +02:00
capability.c
compat.c
configs.c
context_tracking.c
cpu.c
cpu_pm.c
crash_core.c
crash_dump.c
cred.c
delayacct.c
dma.c
exec_domain.c
exit.c	mm: optimize the redundant loop of mm_update_owner_next()	2024-07-18 11:40:51 +02:00
extable.c
fail_function.c
fork.c
freezer.c
futex.c
gen_kheaders.sh	kheaders: explicitly define file modes for archived headers	2024-07-05 09:08:25 +02:00
groups.c
hung_task.c
iomem.c
irq_work.c
jump_label.c
kallsyms.c
kcmp.c
Kconfig.freezer
Kconfig.hz
Kconfig.locks
Kconfig.preempt
kcov.c
kexec.c
kexec_core.c
kexec_elf.c
kexec_file.c
kexec_internal.h
kheaders.c
kmod.c
kprobes.c	kprobes: Fix possible use-after-free issue on kprobe registration	2024-05-02 16:18:30 +02:00
ksysfs.c
kthread.c
latencytop.c
Makefile
module-internal.h
module.c
module_signature.c
module_signing.c
notifier.c
nsproxy.c
padata.c
panic.c
params.c	params: lift param_set_uint_minmax to common code	2024-06-16 13:28:45 +02:00
pid.c
pid_namespace.c
profile.c
ptrace.c
range.c
reboot.c
relay.c
resource.c
rseq.c
seccomp.c
signal.c
smp.c
smpboot.c
smpboot.h
softirq.c
stackleak.c
stacktrace.c
stop_machine.c
sys.c
sys_ni.c
sysctl-test.c
sysctl.c
sysctl_binary.c
task_work.c
taskstats.c
test_kprobes.c
torture.c
tracepoint.c
tsacct.c
ucount.c
uid16.c
uid16.h
umh.c
up.c
user-return-notifier.c
user.c
user_namespace.c
utsname.c
utsname_sysctl.c
watchdog.c
watchdog_hld.c
workqueue.c
workqueue_internal.h