From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-yw1-f202.google.com (mail-yw1-f202.google.com [209.85.128.202]) (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 915E1381B08 for ; Thu, 7 May 2026 22:19:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.202 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778192393; cv=none; b=dBoFT7XABat585etkE5sbAGl1DqXQtPfxGhN3npaiSYlc+nODlecRjw57WbdW4LYEEbhUmQ+Tz5tM0bmASPmZzxpfJDkLYkLnttsn6hm+antD8LyIO2TdEb/Q2hmBBmop2FKkOp2u5cP0tFFq81bJuQNuO9UH2J28I6rrVtj5Xc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778192393; c=relaxed/simple; bh=qq1bvFc69B4e2REahz9uE7Y0uCS1DU49gU3TjTskWmk=; h=Date:Mime-Version:Message-ID:Subject:From:To:Cc:Content-Type; b=rF5V+a59YPkqRYppCgRl51A3BUGx6Wjyjfvzfy+jd0TfrLrcmrrovNmSqdeDQN+sA6MQoy4C0JVXXAhAamRXON26/cVRRu0h3ETZU6GqEyxqyJhZRLCdWuYVrehYUk2FFv3h1hXhrU4+GsrOsb0guMpl1qKWi7hdZKVFkQG+Hcw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--edumazet.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=KSrFLLAv; arc=none smtp.client-ip=209.85.128.202 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--edumazet.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="KSrFLLAv" Received: by mail-yw1-f202.google.com with SMTP id 00721157ae682-7bd49a2467eso27890557b3.2 for ; Thu, 07 May 2026 15:19:51 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1778192390; x=1778797190; darn=vger.kernel.org; h=cc:to:from:subject:message-id:mime-version:date:from:to:cc:subject :date:message-id:reply-to; bh=8NuEqfRHqQkJdW1na8Of/tbwrAKQo6V7V2W5adD6DLQ=; b=KSrFLLAvkNh2Yqofy59Ya0l+7zQrCf8UhlEB1LNAH4nHE2n7JwU/Sh+WEhdVLj2HKs qqJ3X/mGLAcMiJCjzoc/F8qtdlmjj8LyGdhY33H/CJtsmTMYgBglMGXQyQEAAozbm9Vp EMBM5pIZ5+VizHcVq7q4/F0+Xq97qsoV0QDtsmb7jgqJ4fHo5FUvGIpavAiwFApPsqAl jojsGukIH/w3f8QaSAju5qKdDJ43HwlNej39hV/Sq+QYQincdcMit66e4FP8BdCEElt3 Ggq6cf/TCUrlO0l/0Irttk8Jso5AR1ey42vmoHSTqtfu9XvOFd1psAKKrmTWmAIT6JS7 /j0Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1778192390; x=1778797190; h=cc:to:from:subject:message-id:mime-version:date:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=8NuEqfRHqQkJdW1na8Of/tbwrAKQo6V7V2W5adD6DLQ=; b=I5OdWlk9ybo+7dXHtbxi46qd1GBHRhdJ84s5YeLBJwqyHzIvElveJ4Q6JFNMfXRSXq zGcKO+LySJ4/bXBimbijQnPQInYG+fJfQt8CgbfS4oa+B09eVPTNXBBImi1NRdQvcgxU x5atXSsv74MaXZqat5aAoKUIzpV6jhA7unmdE60bEXpoyb8DXVyZfd7HmW4cAZwM0TiH hhWTtTCSpGXP4VT7bOsitb3cViswqAT6iB6YQgz4EMk+E8Tl5lTfiSvdxW53OrcEzMMH /peOnJQV53YhAEf52s+1PUNoNpwE3F+4uLoa1bpUCvdaYMlBZ7861sq8xiClJmu/CDAy sogw== X-Forwarded-Encrypted: i=1; AFNElJ9UlU0rT2xbI7fGmkf5sywyXAy/wlUL6koIg/5m+IntxBO95iiCZSUUxYcy2hELUHUrNotfrY0=@vger.kernel.org X-Gm-Message-State: AOJu0YzeMloJY0FGwP9H7y1S8+kaOD0kufndkwO78nZngff7yoAi0XrL xPUzKwf4dYlTpRp9N4RGPAC67RqorVaxqzMep7zd2KtGcidRQZ0wy/SgqOycvZfUzNhiqTNp0MT n5Z57DP8dYhptLQ== X-Received: from ywuu26.prod.google.com ([2002:a05:690c:a5da:b0:7ba:e579:5e52]) (user=edumazet job=prod-delivery.src-stubby-dispatcher) by 2002:a05:690c:6e83:b0:7bd:7b2e:f09a with SMTP id 00721157ae682-7bdf5edb503mr105435357b3.35.1778192390012; Thu, 07 May 2026 15:19:50 -0700 (PDT) Date: Thu, 7 May 2026 22:19:40 +0000 Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 X-Mailer: git-send-email 2.54.0.563.g4f69b47b94-goog Message-ID: <20260507221948.335726-1-edumazet@google.com> Subject: [PATCH net-next 0/8] net/sched: prepare lockless qdisc dumps From: Eric Dumazet To: "David S . Miller" , Jakub Kicinski , Paolo Abeni Cc: Simon Horman , Jamal Hadi Salim , Jiri Pirko , netdev@vger.kernel.org, eric.dumazet@gmail.com, Eric Dumazet Content-Type: text/plain; charset="UTF-8" Goal is to no longer acquire RTNL in qdisc dumps. This series annotate data-races, and change mq and mq_prio to no longer acquire children qdisc spinlocks. Eric Dumazet (8): net/sched: add READ_ONCE() in gnet_stats_add_queue[_cpu] net/sched: add qdisc_qlen_inc() and qdisc_qlen_dec() net/sched: annotate data-races around sch->qstats.backlog net/sched: add qdisc_qlen_lockless() helper net/sched: add const qualifiers to gnet_stats helpers net/sched: mq: no longer acquire qdisc spinlocks in dump operations net/sched: mq_prio: no longer acquire qdisc spinlocks in mqprio_dump() net/sched: mq_prio: no longer acquire qdisc spinlocks in mqprio_dump_class_stats() include/net/gen_stats.h | 12 +++--- include/net/sch_generic.h | 56 ++++++++++++++++++++----- net/core/gen_stats.c | 44 ++++++++++---------- net/sched/sch_api.c | 4 +- net/sched/sch_cake.c | 15 ++++--- net/sched/sch_cbs.c | 6 +-- net/sched/sch_choke.c | 8 ++-- net/sched/sch_codel.c | 2 +- net/sched/sch_drr.c | 6 +-- net/sched/sch_dualpi2.c | 6 +-- net/sched/sch_etf.c | 8 ++-- net/sched/sch_ets.c | 6 +-- net/sched/sch_fq.c | 8 ++-- net/sched/sch_fq_codel.c | 11 ++--- net/sched/sch_fq_pie.c | 8 ++-- net/sched/sch_generic.c | 12 +++--- net/sched/sch_gred.c | 2 +- net/sched/sch_hfsc.c | 6 +-- net/sched/sch_hhf.c | 7 ++-- net/sched/sch_htb.c | 6 +-- net/sched/sch_mq.c | 35 +++++++++++----- net/sched/sch_mqprio.c | 86 +++++++++++++++++++++------------------ net/sched/sch_multiq.c | 4 +- net/sched/sch_netem.c | 12 +++--- net/sched/sch_prio.c | 6 +-- net/sched/sch_qfq.c | 8 ++-- net/sched/sch_red.c | 6 +-- net/sched/sch_sfb.c | 8 ++-- net/sched/sch_sfq.c | 11 ++--- net/sched/sch_skbprio.c | 4 +- net/sched/sch_taprio.c | 4 +- net/sched/sch_tbf.c | 10 ++--- net/sched/sch_teql.c | 2 +- 33 files changed, 242 insertions(+), 187 deletions(-) -- 2.54.0.563.g4f69b47b94-goog