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| author | Yafang Shao <laoar.shao@gmail.com> | 2023-02-10 18:47:31 +0300 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2023-02-11 05:59:56 +0300 |
| commit | b6c1a8af5b1eec42aabc13376f94aa90c3d765f1 (patch) | |
| tree | ac9d6ca0ed8542d878eb51bf0adb7044703a75d1 /mm/memcontrol.c | |
| parent | 7e2a9ebe8126206157056cca5dd30a656f3d8a81 (diff) | |
| download | linux-b6c1a8af5b1eec42aabc13376f94aa90c3d765f1.tar.xz | |
mm: memcontrol: add new kernel parameter cgroup.memory=nobpf
Add new kernel parameter cgroup.memory=nobpf to allow user disable bpf
memory accounting. This is a preparation for the followup patch.
Signed-off-by: Yafang Shao <laoar.shao@gmail.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Roman Gushchin <roman.gushchin@linux.dev>
Link: https://lore.kernel.org/r/20230210154734.4416-2-laoar.shao@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'mm/memcontrol.c')
| -rw-r--r-- | mm/memcontrol.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 73afff8062f9..49f40730e711 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -88,6 +88,9 @@ static bool cgroup_memory_nosocket __ro_after_init; /* Kernel memory accounting disabled? */ static bool cgroup_memory_nokmem __ro_after_init; +/* BPF memory accounting disabled? */ +static bool cgroup_memory_nobpf __ro_after_init; + #ifdef CONFIG_CGROUP_WRITEBACK static DECLARE_WAIT_QUEUE_HEAD(memcg_cgwb_frn_waitq); #endif @@ -347,6 +350,9 @@ static void memcg_reparent_objcgs(struct mem_cgroup *memcg, */ DEFINE_STATIC_KEY_FALSE(memcg_kmem_enabled_key); EXPORT_SYMBOL(memcg_kmem_enabled_key); + +DEFINE_STATIC_KEY_FALSE(memcg_bpf_enabled_key); +EXPORT_SYMBOL(memcg_bpf_enabled_key); #endif /** @@ -5357,6 +5363,11 @@ mem_cgroup_css_alloc(struct cgroup_subsys_state *parent_css) if (cgroup_subsys_on_dfl(memory_cgrp_subsys) && !cgroup_memory_nosocket) static_branch_inc(&memcg_sockets_enabled_key); +#if defined(CONFIG_MEMCG_KMEM) + if (!cgroup_memory_nobpf) + static_branch_inc(&memcg_bpf_enabled_key); +#endif + return &memcg->css; } @@ -5441,6 +5452,11 @@ static void mem_cgroup_css_free(struct cgroup_subsys_state *css) if (!cgroup_subsys_on_dfl(memory_cgrp_subsys) && memcg->tcpmem_active) static_branch_dec(&memcg_sockets_enabled_key); +#if defined(CONFIG_MEMCG_KMEM) + if (!cgroup_memory_nobpf) + static_branch_dec(&memcg_bpf_enabled_key); +#endif + vmpressure_cleanup(&memcg->vmpressure); cancel_work_sync(&memcg->high_work); mem_cgroup_remove_from_trees(memcg); @@ -7269,6 +7285,8 @@ static int __init cgroup_memory(char *s) cgroup_memory_nosocket = true; if (!strcmp(token, "nokmem")) cgroup_memory_nokmem = true; + if (!strcmp(token, "nobpf")) + cgroup_memory_nobpf = true; } return 1; } |