diff mbox series

[bpf-next,v8,12/34] bpf: refine memcg-based memory accounting for hashtab maps

Message ID 20201125030119.2864302-13-guro@fb.com (mailing list archive)
State Changes Requested
Delegated to: BPF
Headers show
Series bpf: switch to memcg-based memory accounting | expand

Checks

Context Check Description
netdev/cover_letter success Link
netdev/fixes_present success Link
netdev/patch_count fail Series longer than 15 patches
netdev/tree_selection success Clearly marked for bpf-next
netdev/subject_prefix success Link
netdev/source_inline success Was 0 now: 0
netdev/verify_signedoff success Link
netdev/module_param success Was 0 now: 0
netdev/build_32bit success Errors and warnings before: 21 this patch: 21
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/verify_fixes success Link
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 51 lines checked
netdev/build_allmodconfig_warn success Errors and warnings before: 21 this patch: 21
netdev/header_inline success Link
netdev/stable success Stable not CCed

Commit Message

Roman Gushchin Nov. 25, 2020, 3 a.m. UTC 
Include percpu objects and the size of map metadata into the
accounting.

Signed-off-by: Roman Gushchin <guro@fb.com>
---
 kernel/bpf/hashtab.c | 15 ++++++++-------
 1 file changed, 8 insertions(+), 7 deletions(-)
diff mbox series

Patch

diff --git a/kernel/bpf/hashtab.c b/kernel/bpf/hashtab.c
index ec46266aaf1c..2b8bbdbec872 100644
--- a/kernel/bpf/hashtab.c
+++ b/kernel/bpf/hashtab.c
@@ -292,7 +292,8 @@  static int prealloc_init(struct bpf_htab *htab)
 		u32 size = round_up(htab->map.value_size, 8);
 		void __percpu *pptr;
 
-		pptr = __alloc_percpu_gfp(size, 8, GFP_USER | __GFP_NOWARN);
+		pptr = __alloc_percpu_gfp(size, 8, GFP_USER | __GFP_NOWARN |
+					  __GFP_ACCOUNT);
 		if (!pptr)
 			goto free_elems;
 		htab_elem_set_ptr(get_htab_elem(htab, i), htab->map.key_size,
@@ -347,7 +348,7 @@  static int alloc_extra_elems(struct bpf_htab *htab)
 	int cpu;
 
 	pptr = __alloc_percpu_gfp(sizeof(struct htab_elem *), 8,
-				  GFP_USER | __GFP_NOWARN);
+				  GFP_USER | __GFP_NOWARN | __GFP_ACCOUNT);
 	if (!pptr)
 		return -ENOMEM;
 
@@ -444,7 +445,7 @@  static struct bpf_map *htab_map_alloc(union bpf_attr *attr)
 	int err, i;
 	u64 cost;
 
-	htab = kzalloc(sizeof(*htab), GFP_USER);
+	htab = kzalloc(sizeof(*htab), GFP_USER | __GFP_ACCOUNT);
 	if (!htab)
 		return ERR_PTR(-ENOMEM);
 
@@ -892,6 +893,7 @@  static struct htab_elem *alloc_htab_elem(struct bpf_htab *htab, void *key,
 					 bool percpu, bool onallcpus,
 					 struct htab_elem *old_elem)
 {
+	const gfp_t gfp = GFP_ATOMIC | __GFP_NOWARN | __GFP_ACCOUNT;
 	u32 size = htab->map.value_size;
 	bool prealloc = htab_is_prealloc(htab);
 	struct htab_elem *l_new, **pl_new;
@@ -925,8 +927,8 @@  static struct htab_elem *alloc_htab_elem(struct bpf_htab *htab, void *key,
 				l_new = ERR_PTR(-E2BIG);
 				goto dec_count;
 			}
-		l_new = kmalloc_node(htab->elem_size, GFP_ATOMIC | __GFP_NOWARN,
-				     htab->map.numa_node);
+		l_new = bpf_map_kmalloc_node(&htab->map, htab->elem_size, gfp,
+					     htab->map.numa_node);
 		if (!l_new) {
 			l_new = ERR_PTR(-ENOMEM);
 			goto dec_count;
@@ -942,8 +944,7 @@  static struct htab_elem *alloc_htab_elem(struct bpf_htab *htab, void *key,
 			pptr = htab_elem_get_ptr(l_new, key_size);
 		} else {
 			/* alloc_percpu zero-fills */
-			pptr = __alloc_percpu_gfp(size, 8,
-						  GFP_ATOMIC | __GFP_NOWARN);
+			pptr = bpf_map_alloc_percpu(&htab->map, size, 8, gfp);
 			if (!pptr) {
 				kfree(l_new);
 				l_new = ERR_PTR(-ENOMEM);