From nobody Wed Sep 17 19:53:30 2025 Received: from mail-pl1-f202.google.com (mail-pl1-f202.google.com [209.85.214.202]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 389122580FB for ; Thu, 14 Aug 2025 20:09:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.202 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755202167; cv=none; b=NDRSJ2KPdtWweZQJ0+RCu9ugWkt9GsDTuHaV+/DMRF/HRypG475tv8svXSfd2dByONqAstsnYnvU6UEIP4S8i35ZvhR+Mu4UnANnPhv8rpjTh9AtbYr0tEuBKomzSU9FP0iIgRw+Dg9lOW+tgZAJhyCyh++CRNmDBp2DlK5h89k= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755202167; c=relaxed/simple; bh=9e+MQL+1kufw9HczfwR0qRzJsdj8exP9jCcEPhaMv6Y=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=R88xqF45Qbk69iJ+bgENgTvXBc6+oarpqIbrFltFJ7L/nE7xk1ctgV3StCu6/fBnQ9OPcMdl2qYYkXL+XD+4qLOlb5cTwVCGOijDdmI6XPMmvJDPw2+8HT6kM+Vt6mLWJmAYHi62uGrmyM6L1PsRnIobwio6i+fXvF2KKw7ySlQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--kuniyu.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=jbipzOus; arc=none smtp.client-ip=209.85.214.202 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--kuniyu.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="jbipzOus" Received: by mail-pl1-f202.google.com with SMTP id d9443c01a7336-24457efb475so15483875ad.0 for ; Thu, 14 Aug 2025 13:09:26 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1755202165; x=1755806965; darn=lists.linux.dev; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=RN4H8OhMESZggI/pZXAKf5UmJPFi9rM002XSMoc6emQ=; b=jbipzOusliTJcHBaDJCTu7e/x3nPvnexSAM5wniJbB2V53t6hSf/wESufeiGpMsBW8 j4i3lLmlNJkutPOS0qwy5llaPkswcSH/2MP7XCDS8918b24vZ881k032lYCLmnwb+O7D SL8yppUDH7U1mC/z/5pTxkUClPcRbcgLXnr5O8SlPVChMyd4borwSQUU3ENB6d/zOSyT XDLUWQaIAlID6Yg2DlA2VKkSBQntMBWlQ78GGpsh8YhZwDdbCliA2HpkJ+kWQc9YfKYR IFd/MG8lEbb7+pb00lU/OX6mYbYUVWW69OzNi/WNQQTHqwVXXdOJQ7TVVD5s7N2IJEFV JV6w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1755202165; x=1755806965; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=RN4H8OhMESZggI/pZXAKf5UmJPFi9rM002XSMoc6emQ=; b=Cf04QitgIByPiBqJR+gPij8yz1fEa8GPK1yFqAwpchgtFbWjUr+bBtaXTYBg3EmYeP ln3P73dfKmVGPX+Hf+a8Pts4Cc2yKCo3zVq09FfnSbicO9mv7ODRPoHsq/0uQ5unY2sv xHHJdiG1tLZ4Kjt5k0dglM9UlweBYi2mEU8+eU1s4izdX3+tLGILXCZrbj762N5SdoYg oeRefRVpE78womHYNnhbgdavREP8C2xugWskWtX8aASSTMeibRgAnSsr2uFKP5mO5ecl EHeu1qba8cmPnW+0+tC4pYtv6wN4amhOOtWpSBVTn5sUKNMSFQqUwH/b00vX3W9CmgkY nF2w== X-Forwarded-Encrypted: i=1; AJvYcCVSVcOZufCUAy/aYGUza2i7HzRWPZ9qopRFEpLLHODDAJoHp28EF625/tx5W9IaGmQq/7R0Fg==@lists.linux.dev X-Gm-Message-State: AOJu0Yy0IvRTWXhu5jP9CNDL1wLt31xeVGwTqJNUDKDFlMvU0nIKHOTM kn0ZkuoCIfzTNkzP3Yw4DKqeezQ8VvG562bkEdIGbsN1KCowyoe6TTdzxBMoIE4morM+B1qlshG 3u8noVA== X-Google-Smtp-Source: AGHT+IGjybKWRKb8eGBGrIqhLAFzL1Ig08nwLcmkE6zoBHcD3GY1TtW/rYf6Ml05cqJS44L2U3FStQ7jMm0= X-Received: from pjbnc16.prod.google.com ([2002:a17:90b:37d0:b0:312:dbc:f731]) (user=kuniyu job=prod-delivery.src-stubby-dispatcher) by 2002:a17:903:32d2:b0:234:8ef1:aa7b with SMTP id d9443c01a7336-24458a4c885mr60555155ad.20.1755202165500; Thu, 14 Aug 2025 13:09:25 -0700 (PDT) Date: Thu, 14 Aug 2025 20:08:39 +0000 In-Reply-To: <20250814200912.1040628-1-kuniyu@google.com> Precedence: bulk X-Mailing-List: mptcp@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20250814200912.1040628-1-kuniyu@google.com> X-Mailer: git-send-email 2.51.0.rc1.163.g2494970778-goog Message-ID: <20250814200912.1040628-8-kuniyu@google.com> Subject: [PATCH v4 net-next 07/10] net-memcg: Introduce mem_cgroup_sk_enabled(). From: Kuniyuki Iwashima To: "David S. Miller" , Eric Dumazet , Jakub Kicinski , Neal Cardwell , Paolo Abeni , Willem de Bruijn , Matthieu Baerts , Mat Martineau , Johannes Weiner , Michal Hocko , Roman Gushchin , Shakeel Butt , Andrew Morton , "=?UTF-8?q?Michal=20Koutn=C3=BD?=" , Tejun Heo Cc: Simon Horman , Geliang Tang , Muchun Song , Mina Almasry , Kuniyuki Iwashima , Kuniyuki Iwashima , netdev@vger.kernel.org, mptcp@lists.linux.dev, cgroups@vger.kernel.org, linux-mm@kvack.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" The socket memcg feature is enabled by a static key and only works for non-root cgroup. We check both conditions in many places. Let's factorise it as a helper function. Signed-off-by: Kuniyuki Iwashima Reviewed-by: Eric Dumazet Acked-by: Roman Gushchin Acked-by: Shakeel Butt --- include/net/proto_memory.h | 2 +- include/net/sock.h | 10 ++++++++++ include/net/tcp.h | 2 +- net/core/sock.c | 6 +++--- net/ipv4/tcp_output.c | 2 +- 5 files changed, 16 insertions(+), 6 deletions(-) diff --git a/include/net/proto_memory.h b/include/net/proto_memory.h index a6ab2f4f5e28..859e63de81c4 100644 --- a/include/net/proto_memory.h +++ b/include/net/proto_memory.h @@ -31,7 +31,7 @@ static inline bool sk_under_memory_pressure(const struct = sock *sk) if (!sk->sk_prot->memory_pressure) return false; =20 - if (mem_cgroup_sockets_enabled && sk->sk_memcg && + if (mem_cgroup_sk_enabled(sk) && mem_cgroup_under_socket_pressure(sk->sk_memcg)) return true; =20 diff --git a/include/net/sock.h b/include/net/sock.h index 811f95ea8d00..3efdf680401d 100644 --- a/include/net/sock.h +++ b/include/net/sock.h @@ -2599,11 +2599,21 @@ static inline struct mem_cgroup *mem_cgroup_from_sk= (const struct sock *sk) { return sk->sk_memcg; } + +static inline bool mem_cgroup_sk_enabled(const struct sock *sk) +{ + return mem_cgroup_sockets_enabled && mem_cgroup_from_sk(sk); +} #else static inline struct mem_cgroup *mem_cgroup_from_sk(const struct sock *sk) { return NULL; } + +static inline bool mem_cgroup_sk_enabled(const struct sock *sk) +{ + return false; +} #endif =20 static inline long sock_rcvtimeo(const struct sock *sk, bool noblock) diff --git a/include/net/tcp.h b/include/net/tcp.h index 526a26e7a150..9f01b6be6444 100644 --- a/include/net/tcp.h +++ b/include/net/tcp.h @@ -275,7 +275,7 @@ extern unsigned long tcp_memory_pressure; /* optimized version of sk_under_memory_pressure() for TCP sockets */ static inline bool tcp_under_memory_pressure(const struct sock *sk) { - if (mem_cgroup_sockets_enabled && sk->sk_memcg && + if (mem_cgroup_sk_enabled(sk) && mem_cgroup_under_socket_pressure(sk->sk_memcg)) return true; =20 diff --git a/net/core/sock.c b/net/core/sock.c index 000940ecf360..ab658fe23e1e 100644 --- a/net/core/sock.c +++ b/net/core/sock.c @@ -1032,7 +1032,7 @@ static int sock_reserve_memory(struct sock *sk, int b= ytes) bool charged; int pages; =20 - if (!mem_cgroup_sockets_enabled || !sk->sk_memcg || !sk_has_account(sk)) + if (!mem_cgroup_sk_enabled(sk) || !sk_has_account(sk)) return -EOPNOTSUPP; =20 if (!bytes) @@ -3271,7 +3271,7 @@ int __sk_mem_raise_allocated(struct sock *sk, int siz= e, int amt, int kind) sk_memory_allocated_add(sk, amt); allocated =3D sk_memory_allocated(sk); =20 - if (mem_cgroup_sockets_enabled && sk->sk_memcg) { + if (mem_cgroup_sk_enabled(sk)) { memcg =3D sk->sk_memcg; charged =3D mem_cgroup_charge_skmem(memcg, amt, gfp_memcg_charge()); if (!charged) @@ -3398,7 +3398,7 @@ void __sk_mem_reduce_allocated(struct sock *sk, int a= mount) { sk_memory_allocated_sub(sk, amount); =20 - if (mem_cgroup_sockets_enabled && sk->sk_memcg) + if (mem_cgroup_sk_enabled(sk)) mem_cgroup_uncharge_skmem(sk->sk_memcg, amount); =20 if (sk_under_global_memory_pressure(sk) && diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c index caf11920a878..37fb320e6f70 100644 --- a/net/ipv4/tcp_output.c +++ b/net/ipv4/tcp_output.c @@ -3578,7 +3578,7 @@ void sk_forced_mem_schedule(struct sock *sk, int size) sk_forward_alloc_add(sk, amt << PAGE_SHIFT); sk_memory_allocated_add(sk, amt); =20 - if (mem_cgroup_sockets_enabled && sk->sk_memcg) + if (mem_cgroup_sk_enabled(sk)) mem_cgroup_charge_skmem(sk->sk_memcg, amt, gfp_memcg_charge() | __GFP_NOFAIL); } --=20 2.51.0.rc1.163.g2494970778-goog