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Filename Latest commit message Latest commit date
Roman Gushchin d1191db271 UPSTREAM: bpf: rework memlock-based memory accounting for maps 
In order to unify the existing memlock charging code with the
memcg-based memory accounting, which will be added later, let's
rework the current scheme.

Currently the following design is used:
  1) .alloc() callback optionally checks if the allocation will likely
     succeed using bpf_map_precharge_memlock()
  2) .alloc() performs actual allocations
  3) .alloc() callback calculates map cost and sets map.memory.pages
  4) map_create() calls bpf_map_init_memlock() which sets map.memory.user
     and performs actual charging; in case of failure the map is
     destroyed
  <map is in use>
  1) bpf_map_free_deferred() calls bpf_map_release_memlock(), which
     performs uncharge and releases the user
  2) .map_free() callback releases the memory

The scheme can be simplified and made more robust:
  1) .alloc() calculates map cost and calls bpf_map_charge_init()
  2) bpf_map_charge_init() sets map.memory.user and performs actual
    charge
  3) .alloc() performs actual allocations
  <map is in use>
  1) .map_free() callback releases the memory
  2) bpf_map_charge_finish() performs uncharge and releases the user

The new scheme also allows to reuse bpf_map_charge_init()/finish()
functions for memcg-based accounting. Because charges are performed
before actual allocations and uncharges after freeing the memory,
no bogus memory pressure can be created.

In cases when the map structure is not available (e.g. it's not
created yet, or is already destroyed), on-stack bpf_map_memory
structure is used. The charge can be transferred with the
bpf_map_charge_move() function.

Change-Id: I299bfa9d3e74f366861b6de3bf17951a1374824b
Signed-off-by: Roman Gushchin <guro@fb.com>
Acked-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Sorayukii <sorayukii69@gmail.com>
2026-05-15 17:57:45 +07:00
..
bpf UPSTREAM: bpf: rework memlock-based memory accounting for maps 2026-05-15 17:57:45 +07:00
cgroup BACKPORT: bpf: decouple the lifetime of cgroup_bpf from cgroup itself 2026-05-15 17:57:44 +07:00
configs
debug UPSTREAM: kdb: use correct pointer when 'btc' calls 'btt' 2022-02-21 16:30:05 +01:00
events UPSTREAM: perf/core: add perf_get_event() to return perf_event given a struct file 2026-05-15 17:56:32 +07:00
gcov Merge branch 'android-4.9-q' of https://android.googlesource.com/kernel/common into lineage-20 2023-01-19 15:42:12 +01:00
irq Merge remote-tracking branch 'common/android-4.9-q' into android12-4.9-sdm845 2022-07-18 14:05:31 +03:00
livepatch
locking UPSTREAM: locking/lockdep: Add new check to lock_downgrade() 2026-05-15 17:57:11 +07:00
power treewide: Backport new vmalloc for large performance benefits 2026-05-15 17:48:25 +07:00
printk Merge remote-tracking branch 'common/android-4.9-q' into android12-4.9-sdm845 2022-06-12 01:39:01 +03:00
rcu rcu: Fix self-wakeups for grace-period kthread 2026-05-15 17:49:36 +07:00
sched UPSTREAM: bpf: check that BPF programs run with preemption disabled 2026-05-15 17:57:32 +07:00
time BACKPORT: rcu: Ports some of RCU's taken from k4.14 2026-05-15 17:49:30 +07:00
trace BACKPORT: bpf: add writable context for raw tracepoints 2026-05-15 17:57:41 +07:00
.gitignore BACKPORT: Provide in-kernel headers to make extending kernel easier 2019-07-03 14:30:53 -04:00
acct.c acct: fix potential integer overflow in encode_comp_t() 2023-01-07 12:07:31 +01:00
async.c
audit.c Merge branch 'android-4.9-q' of https://android.googlesource.com/kernel/common into lineage-18.1-caf-sdm845 2021-04-26 01:27:02 +03:00
audit.h audit: fix a net reference leak in audit_list_rules_send() 2021-04-07 12:05:41 +02:00
audit_fsnotify.c
audit_tree.c
audit_watch.c audit: CONFIG_CHANGE don't log internal bookkeeping as an event 2020-10-01 20:40:07 +02:00
auditfilter.c audit: fix a net reference leak in audit_list_rules_send() 2021-04-07 12:05:41 +02:00
auditsc.c Merge android-4.9.204(72e8598) into msm-4.9 2020-01-06 18:13:26 +08:00
backtracetest.c
bounds.c
capability.c
cfi.c
compat.c
configs.c
context_tracking.c
cpu.c rcu: Migrate callbacks earlier in the CPU-offline timeline 2026-05-15 17:49:31 +07:00
cpu_pm.c Merge branch 'android-4.9-q' of https://android.googlesource.com/kernel/common into HEAD 2020-06-30 02:33:58 +03:00
crash_dump.c
cred.c memcg: account security cred as well to kmemcg 2020-01-12 11:24:13 +01:00
delayacct.c
dma.c
exec_domain.c
exit.c cgroup: Call cgroup_release() before __exit_signal() 2026-05-15 17:50:40 +07:00
extable.c BACKPORT: bpf: make jited programs visible in traces 2026-05-15 17:54:30 +07:00
fork.c BACKPORT: cgroup: cgroup v2 freezer 2026-05-15 17:50:46 +07:00
freezer.c
futex.c mm, futex: fix shared futex pgoff on shmem huge page 2021-07-11 12:46:40 +02:00
gen_kheaders.sh BACKPORT: kheaders: Do not regenerate archive if config is not changed 2019-07-03 14:31:16 -04:00
groups.c treewide: Backport new vmalloc for large performance benefits 2026-05-15 17:48:25 +07:00
hung_task.c Merge android-4.9.170 (1ef64da) into msm-4.9 2019-05-30 14:15:13 +08:00
irq_work.c
jump_label.c jump_label: Disable jump labels in __exit code 2021-06-06 18:42:18 +03:00
kallsyms.c BACKPORT: symbol lookup: introduce dereference_symbol_descriptor() 2026-05-15 17:57:02 +07:00
kcmp.c
Kconfig.freezer
Kconfig.hz
Kconfig.locks BACKPORT: bpf: introduce bpf_spin_lock 2026-05-15 17:57:29 +07:00
Kconfig.preempt
kcov.c
kexec.c
kexec_core.c treewide: Backport new vmalloc for large performance benefits 2026-05-15 17:48:25 +07:00
kexec_file.c Merge remote-tracking branch 'common/android-4.9-q' into android12-4.9-sdm845 2022-07-18 14:05:31 +03:00
kexec_internal.h
kheaders.c BACKPORT: kheaders: Move from proc to sysfs 2019-07-03 14:31:02 -04:00
kmod.c BACKPORT: kmod: split out umh code into its own file 2026-05-15 17:56:31 +07:00
kprobes.c UPSTREAM: kprobes: Show blacklist addresses as same as kallsyms does 2026-05-15 17:57:02 +07:00
ksysfs.c
kthread.c Merge branch 'android-4.9-q' of https://android.googlesource.com/kernel/common into lineage-18.1-caf-sdm845 2021-07-22 02:11:11 +03:00
latencytop.c
Makefile BACKPORT: kmod: split out umh code into its own file 2026-05-15 17:56:31 +07:00
membarrier.c
memremap.c
module-internal.h
module.c BACKPORT: bpf: support raw tracepoints in modules 2026-05-15 17:57:25 +07:00
module_signing.c
notifier.c x86/mm: split vmalloc_sync_all() 2020-04-02 17:20:26 +02:00
nsproxy.c
padata.c padata: purge get_cpu and reorder_via_wq from padata_do_serial 2020-05-27 16:41:53 +02:00
panic.c BACKPORT: locking/refcount: Create unchecked atomic_t implementation 2026-05-15 17:54:59 +07:00
params.c
pid.c UPSTREAM: locking/atomic, kref: Add KREF_INIT() 2021-01-05 16:00:48 +00:00
pid_namespace.c memcg: enable accounting for pids in nested pid namespaces 2021-09-22 11:43:08 +02:00
profile.c profiling: fix shift-out-of-bounds bugs 2021-09-26 13:36:18 +02:00
ptrace.c ptrace: Reimplement PTRACE_KILL by always sending SIGKILL 2022-06-14 16:52:28 +02:00
range.c
reboot.c reboot: fix overflow parsing reboot cpu number 2020-11-18 18:26:32 +01:00
relay.c kernel/relay.c: fix memleak on destroy relay channel 2020-08-26 10:29:03 +02:00
resource.c
seccomp.c BACKPORT: bpf: drop unnecessary context cast from BPF_PROG_RUN 2026-05-15 17:54:14 +07:00
signal.c BACKPORT: cgroup: freezer: call cgroup_enter_frozen() with preemption disabled in ptrace_stop() 2026-05-15 17:50:47 +07:00
smp.c Merge remote-tracking branch 'common/android-4.9-q' into android12-4.9-sdm845 2022-06-12 01:39:01 +03:00
smpboot.c
smpboot.h
softirq.c
stacktrace.c
stop_machine.c
sys.c syscall: Fake uname to 4.19.325 for bpfloader/netd 2026-05-15 17:57:09 +07:00
sys_ni.c BACKPORT: signal: support CLONE_PIDFD with pidfd_send_signal 2019-09-03 13:44:59 -07:00
sysctl.c BACKPORT: bpf: enable program stats 2026-05-15 17:57:32 +07:00
sysctl_binary.c
task_work.c
taskstats.c taskstats: fix data-race 2020-01-12 11:24:12 +01:00
test_kprobes.c
torture.c
tracepoint.c BACKPORT: tracepoint: Add tracepoint_probe_register_may_exist() for BPF tracing 2026-05-15 17:57:41 +07:00
tsacct.c taskstats: Cleanup the use of task->exit_code 2022-02-23 11:56:40 +01:00
ucount.c
uid16.c
umh.c BACKPORT: umh: introduce fork_usermode_blob() helper 2026-05-15 17:56:31 +07:00
up.c
user-return-notifier.c
user.c
user_namespace.c
utsname.c
utsname_sysctl.c
watchdog.c
watchdog_hld.c
workqueue.c rcu: Create RCU-specific workqueues with rescuers 2026-05-15 17:49:31 +07:00
workqueue_internal.h