Alexei Starovoitov 15a07b3381 bpf: add lookup/update support for per-cpu hash and array maps ... The functions bpf_map_lookup_elem(map, key, value) and bpf_map_update_elem(map, key, value, flags) need to get/set values from all-cpus for per-cpu hash and array maps, so that user space can aggregate/update them as necessary. Example of single counter aggregation in user space: unsigned int nr_cpus = sysconf(_SC_NPROCESSORS_CONF); long values[nr_cpus]; long value = 0; bpf_lookup_elem(fd, key, values); for (i = 0; i < nr_cpus; i++) value += values[i]; The user space must provide round_up(value_size, 8) * nr_cpus array to get/set values, since kernel will use 'long' copy of per-cpu values to try to copy good counters atomically. It's a best-effort, since bpf programs and user space are racing to access the same memory. Signed-off-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>		2016-02-06 03:34:36 -05:00
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bpf	bpf: add lookup/update support for per-cpu hash and array maps	2016-02-06 03:34:36 -05:00
configs	…
debug	…
events	Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2016-01-31 15:38:27 -08:00
gcov	…
irq	Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2016-01-31 14:48:58 -08:00
livepatch	…
locking	rtmutex: Make wait_lock irq safe	2016-01-26 11:08:35 +01:00
power	PM: APM_EMULATION does not depend on PM	2016-01-27 23:20:14 +01:00
printk	kernel: printk: specify alignment for struct printk_log	2016-01-20 17:09:18 -08:00
rcu	…
sched	Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2016-01-31 15:44:04 -08:00
time	Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2016-01-31 15:49:06 -08:00
trace	Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2016-01-31 15:38:27 -08:00
.gitignore	…
Kconfig.freezer	…
Kconfig.hz	…
Kconfig.locks	…
Kconfig.preempt	…
Makefile	…
acct.c	…
async.c	…
audit.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security	2016-01-17 19:13:15 -08:00
audit.h	…
audit_fsnotify.c	wrappers for ->i_mutex access	2016-01-22 18:04:28 -05:00
audit_tree.c	…
audit_watch.c	wrappers for ->i_mutex access	2016-01-22 18:04:28 -05:00
auditfilter.c	…
auditsc.c	…
backtracetest.c	…
bounds.c	…
capability.c	…
cgroup.c	…
cgroup_freezer.c	…
cgroup_pids.c	…
compat.c	…
configs.c	…
context_tracking.c	…
cpu.c	kernel/cpu.c: make set_cpu_* static inlines	2016-01-20 17:09:18 -08:00
cpu_pm.c	…
cpuset.c	…
crash_dump.c	…
cred.c	…
delayacct.c	…
dma.c	…
elfcore.c	…
exec_domain.c	…
exit.c	exit: remove unneeded declaration of exit_mm()	2016-01-20 17:09:18 -08:00
extable.c	…
fork.c	…
freezer.c	…
futex.c	rtmutex: Make wait_lock irq safe	2016-01-26 11:08:35 +01:00
futex_compat.c	ptrace: use fsuid, fsgid, effective creds for fs access checks	2016-01-20 17:09:18 -08:00
groups.c	…
hung_task.c	…
irq_work.c	…
jump_label.c	…
kallsyms.c	…
kcmp.c	ptrace: use fsuid, fsgid, effective creds for fs access checks	2016-01-20 17:09:18 -08:00
kexec.c	kexec: set KEXEC_TYPE_CRASH before sanity_check_segment_list()	2016-01-20 17:09:18 -08:00
kexec_core.c	kernel/kexec_core.c: use list_for_each_entry_safe in kimage_free_page_list	2016-01-20 17:09:18 -08:00
kexec_file.c	kexec: move some memembers and definitions within the scope of CONFIG_KEXEC_FILE	2016-01-20 17:09:18 -08:00
kexec_internal.h	kexec: move some memembers and definitions within the scope of CONFIG_KEXEC_FILE	2016-01-20 17:09:18 -08:00
kmod.c	…
kprobes.c	…
ksysfs.c	…
kthread.c	…
latencytop.c	…
membarrier.c	…
memremap.c	phys_to_pfn_t: use phys_addr_t	2016-01-31 09:10:19 -08:00
module-internal.h	…
module.c	…
module_signing.c	…
notifier.c	…
nsproxy.c	…
padata.c	…
panic.c	…
params.c	…
pid.c	Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2016-01-31 15:44:04 -08:00
pid_namespace.c	…
profile.c	…
ptrace.c	ptrace: use fsuid, fsgid, effective creds for fs access checks	2016-01-20 17:09:18 -08:00
range.c	…
reboot.c	…
relay.c	wrappers for ->i_mutex access	2016-01-22 18:04:28 -05:00
resource.c	…
seccomp.c	seccomp: always propagate NO_NEW_PRIVS on tsync	2016-01-27 07:38:25 -08:00
signal.c	…
smp.c	…
smpboot.c	…
smpboot.h	…
softirq.c	…
stacktrace.c	…
stop_machine.c	…
sys.c	prctl: take mmap sem for writing to protect against others	2016-01-20 17:09:18 -08:00
sys_ni.c	…
sysctl.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2016-01-22 10:24:03 -08:00
sysctl_binary.c	…
task_work.c	…
taskstats.c	…
test_kprobes.c	…
torture.c	…
tracepoint.c	…
tsacct.c	…
uid16.c	…
up.c	…
user-return-notifier.c	…
user.c	…
user_namespace.c	…
utsname.c	…
utsname_sysctl.c	…
watchdog.c	…
workqueue.c	…
workqueue_internal.h	…