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authorRoman Gushchin <guro@fb.com>2020-12-01 13:58:49 -0800
committerAlexei Starovoitov <ast@kernel.org>2020-12-02 18:32:46 -0800
commit755e5d55367af5ff75a4db9b6cf439416878e2c7 (patch)
treeeacd259d226bcbf420a440e547b64b33fbe4d290 /kernel/bpf
parent844f157f6c0a905d039d2e20212ab3231f2e5eaf (diff)
bpf: Eliminate rlimit-based memory accounting for hashtab maps
Do not use rlimit-based memory accounting for hashtab maps. It has been replaced with the memcg-based memory accounting. Signed-off-by: Roman Gushchin <guro@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Song Liu <songliubraving@fb.com> Link: https://lore.kernel.org/bpf/20201201215900.3569844-24-guro@fb.com
Diffstat (limited to 'kernel/bpf')
-rw-r--r--kernel/bpf/hashtab.c19
1 files changed, 1 insertions, 18 deletions
diff --git a/kernel/bpf/hashtab.c b/kernel/bpf/hashtab.c
index bf70fb3ed9c1..fe7a0733a63a 100644
--- a/kernel/bpf/hashtab.c
+++ b/kernel/bpf/hashtab.c
@@ -443,7 +443,6 @@ static struct bpf_map *htab_map_alloc(union bpf_attr *attr)
bool prealloc = !(attr->map_flags & BPF_F_NO_PREALLOC);
struct bpf_htab *htab;
int err, i;
- u64 cost;
htab = kzalloc(sizeof(*htab), GFP_USER | __GFP_ACCOUNT);
if (!htab)
@@ -481,26 +480,12 @@ static struct bpf_map *htab_map_alloc(union bpf_attr *attr)
htab->n_buckets > U32_MAX / sizeof(struct bucket))
goto free_htab;
- cost = (u64) htab->n_buckets * sizeof(struct bucket) +
- (u64) htab->elem_size * htab->map.max_entries;
-
- if (percpu)
- cost += (u64) round_up(htab->map.value_size, 8) *
- num_possible_cpus() * htab->map.max_entries;
- else
- cost += (u64) htab->elem_size * num_possible_cpus();
-
- /* if map size is larger than memlock limit, reject it */
- err = bpf_map_charge_init(&htab->map.memory, cost);
- if (err)
- goto free_htab;
-
err = -ENOMEM;
htab->buckets = bpf_map_area_alloc(htab->n_buckets *
sizeof(struct bucket),
htab->map.numa_node);
if (!htab->buckets)
- goto free_charge;
+ goto free_htab;
for (i = 0; i < HASHTAB_MAP_LOCK_COUNT; i++) {
htab->map_locked[i] = bpf_map_alloc_percpu(&htab->map,
@@ -541,8 +526,6 @@ free_map_locked:
for (i = 0; i < HASHTAB_MAP_LOCK_COUNT; i++)
free_percpu(htab->map_locked[i]);
bpf_map_area_free(htab->buckets);
-free_charge:
- bpf_map_charge_finish(&htab->map.memory);
free_htab:
lockdep_unregister_key(&htab->lockdep_key);
kfree(htab);