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David Rientjes da39da3a54 mm, oom: remove task_lock protecting comm printing ... The oom killer takes task_lock() in a couple of places solely to protect printing the task's comm. A process's comm, including current's comm, may change due to /proc/pid/comm or PR_SET_NAME. The comm will always be NULL-terminated, so the worst race scenario would only be during update. We can tolerate a comm being printed that is in the middle of an update to avoid taking the lock. Other locations in the kernel have already dropped task_lock() when printing comm, so this is consistent. Signed-off-by: David Rientjes <rientjes@google.com> Suggested-by: Oleg Nesterov <oleg@redhat.com> Cc: Michal Hocko <mhocko@kernel.org> Cc: Vladimir Davydov <vdavydov@parallels.com> Cc: Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com> Acked-by: Johannes Weiner <hannes@cmpxchg.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		9 years ago
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bpf	bpf, verifier: annotate verbose printer with __printf	9 years ago
configs	kconfig: add xenconfig defconfig helper	10 years ago
debug	…
events	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	9 years ago
gcov	gcov: add support for GCC 5.1	10 years ago
irq	Power management and ACPI updates for v4.4-rc1	9 years ago
livepatch	livepatch: Improve error handling in klp_disable_func()	10 years ago
locking	Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	9 years ago
power	PM / hibernate: fix a comment typo	9 years ago
printk	kexec: split kexec_load syscall from kexec core code	10 years ago
rcu	Merge branches 'doc.2015.10.06a', 'percpu-rwsem.2015.10.06a' and 'torture.2015.10.06a' into HEAD	10 years ago
sched	Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	9 years ago
time	Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	9 years ago
trace	Merge branch 'for-4.4/core' of git://git.kernel.dk/linux-block	9 years ago
.gitignore	…
Kconfig.freezer	…
Kconfig.hz	…
Kconfig.locks	locking/qrwlock: Rename QUEUE_RWLOCK to QUEUED_RWLOCKS	10 years ago
Kconfig.preempt	…
Makefile	sys_membarrier(): system-wide memory barrier (generic, x86)	10 years ago
acct.c	acct: check FMODE_CAN_WRITE	10 years ago
async.c	…
audit.c	Merge branch 'upstream' of git://git.infradead.org/users/pcmoore/audit	10 years ago
audit.h	Merge branch 'upstream' of git://git.infradead.org/users/pcmoore/audit	10 years ago
audit_fsnotify.c	audit: clean simple fsnotify implementation	10 years ago
audit_tree.c	Merge branch 'upstream' of git://git.infradead.org/users/pcmoore/audit	10 years ago
audit_watch.c	Merge branch 'upstream' of git://git.infradead.org/users/pcmoore/audit	10 years ago
auditfilter.c	audit: implement audit by executable	10 years ago
auditsc.c	Merge branch 'upstream' of git://git.infradead.org/users/pcmoore/audit	10 years ago
backtracetest.c	…
bounds.c	…
capability.c	kernel: conditionally support non-root users, groups and capabilities	10 years ago
cgroup.c	Revert "sched, cgroup: replace signal_struct->group_rwsem with a global percpu_rwsem"	10 years ago
cgroup_freezer.c	cgroup: allow a cgroup subsystem to reject a fork	10 years ago
cgroup_pids.c	cgroup: pids: fix invalid get/put usage	10 years ago
compat.c	compat: cleanup coding in compat_get_bitmap() and compat_put_bitmap()	10 years ago
configs.c	…
context_tracking.c	context_tracking: Inherit TIF_NOHZ through forks instead of context switches	10 years ago
cpu.c	Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	9 years ago
cpu_pm.c	kernel/cpu_pm: fix cpu_cluster_pm_exit comment	10 years ago
cpuset.c	mm, oom: remove task_lock protecting comm printing	9 years ago
crash_dump.c	…
cred.c	kernel/cred.c: remove unnecessary kdebug atomic reads	10 years ago
delayacct.c	…
dma.c	…
elfcore.c	…
exec_domain.c	Remove rest of exec domains.	10 years ago
exit.c	Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	9 years ago
extable.c	kernel/extable.c: remove duplicated include	10 years ago
fork.c	posix_cpu_timer: Convert cputimer->running to bool	9 years ago
freezer.c	…
futex.c	driver core update for 4.4-rc1	9 years ago
futex_compat.c	…
groups.c	kernel: conditionally support non-root users, groups and capabilities	10 years ago
hung_task.c	kernel/hung_task.c: change hung_task.c to use for_each_process_thread()	10 years ago
irq_work.c	…
jump_label.c	locking/static_keys: Add selftest	10 years ago
kallsyms.c	…
kcmp.c	…
kexec.c	kexec: split kexec_load syscall from kexec core code	10 years ago
kexec_core.c	kexec/crash: Say which char is the unrecognized	9 years ago
kexec_file.c	kexec: split kexec_file syscall code to kexec_file.c	10 years ago
kexec_internal.h	kexec: split kexec_file syscall code to kexec_file.c	10 years ago
kmod.c	kmod: don't run async usermode helper as a child of kworker thread	9 years ago
kprobes.c	perf/x86/hw_breakpoints: Disallow kernel breakpoints unless kprobe-safe	10 years ago
ksysfs.c	kexec: split kexec_load syscall from kexec core code	10 years ago
kthread.c	kernel/kthread.c:kthread_create_on_node(): clarify documentation	10 years ago
latencytop.c	…
membarrier.c	sys_membarrier(): system-wide memory barrier (generic, x86)	10 years ago
memremap.c	memremap: fix highmem support	9 years ago
module-internal.h	…
module.c	module: Fix locking in symbol_put_addr()	10 years ago
module_signing.c	PKCS#7: Appropriately restrict authenticated attributes and content type	10 years ago
notifier.c	Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	10 years ago
nsproxy.c	…
padata.c	…
panic.c	kernel/panic/kexec: fix "crash_kexec_post_notifiers" option issue in oops path	10 years ago
params.c	Minor merge needed, due to function move.	10 years ago
pid.c	rcu: Rename rcu_lockdep_assert() to RCU_LOCKDEP_WARN()	10 years ago
pid_namespace.c	…
profile.c	mm: rename alloc_pages_exact_node() to __alloc_pages_node()	10 years ago
ptrace.c	seccomp, ptrace: add support for dumping seccomp filters	9 years ago
range.c	…
reboot.c	kexec: split kexec_load syscall from kexec core code	10 years ago
relay.c	kernel/relay.c: use kvfree() in relay_free_page_array()	10 years ago
resource.c	mm: enhance region_is_ram() to region_intersects()	10 years ago
seccomp.c	seccomp, ptrace: add support for dumping seccomp filters	9 years ago
signal.c	signal: fix information leak in copy_siginfo_to_user	10 years ago
smp.c	smp: Fix error case handling in smp_call_function_*()	10 years ago
smpboot.c	stop_machine: Kill smp_hotplug_thread->pre_unpark, introduce stop_machine_unpark()	9 years ago
smpboot.h	…
softirq.c	…
stacktrace.c	…
stop_machine.c	sched: Move cpu_active() tests from stop_two_cpus() into migrate_swap_stop()	9 years ago
sys.c	vfs: Commit to never having exectuables on proc and sysfs.	10 years ago
sys_ni.c	sys_membarrier(): system-wide memory barrier (generic, x86)	10 years ago
sysctl.c	kernel/watchdog.c: add sysctl knob hardlockup_panic	9 years ago
sysctl_binary.c	…
task_work.c	task_work: remove fifo ordering guarantee	10 years ago
taskstats.c	…
test_kprobes.c	…
torture.c	torture: Consolidate cond_resched_rcu_qs() into stutter_wait()	10 years ago
tracepoint.c	…
tsacct.c	…
uid16.c	…
up.c	…
user-return-notifier.c	…
user.c	…
user_namespace.c	capabilities: ambient capabilities	10 years ago
utsname.c	…
utsname_sysctl.c	…
watchdog.c	kernel/watchdog.c: fix race between proc_watchdog_thresh() and watchdog_timer_fn()	9 years ago
workqueue.c	workqueue: make sure delayed work run in local cpu	10 years ago
workqueue_internal.h	…