From nobody Sun Oct 5 00:14:15 2025 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0D38421C160; Mon, 11 Aug 2025 18:27:43 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.18 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1754936865; cv=none; b=qnOdHf6IOZeq6LhUKZq/P7N5V5cI4z2WnLfuwE4bHiafXO/SJZAJ66/yhjTiiw18rrxW4vGDMk6t0tskWytzREqC0m5km/9r5J3Hm2CgrQtRHig5ecjDX8ETZ0LhNYT4LMC93ZjmB9UFl2+ecLcqoGnu6eBd1FlpaeaseMKFoCs= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1754936865; c=relaxed/simple; bh=Uem05OPqqRcTueaZKqOm5X0mvYPisWsdgByf0rFilY4=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=cnc6mJcF78TTdhFwo23rkatsybBcvxf79BfqgpaswpZdqaiszB+fnRBUlnkXT7J8XSDZE6yZXmEtV1VTQDsL4Zse3FPTuxy1jCwXCSzkXf0oJGF7jyW94f+ZGU4+FozGB8CwWbvvecNAalVMmutmCS+u4EDCxc5c9CcxZgsxKC8= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com; spf=none smtp.mailfrom=linux.intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=SoSfNRy/; arc=none smtp.client-ip=198.175.65.18 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="SoSfNRy/" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1754936864; x=1786472864; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=Uem05OPqqRcTueaZKqOm5X0mvYPisWsdgByf0rFilY4=; b=SoSfNRy//NTQbWJyV4cNj3/tAveN+fcvaZ9Hf4BEPEicmFrew9cuyFbB 8aWj7oLXH+vVNR5cSTlXdhn2X9DO0Ci0T0s/naN5RH6Qastn2pDiRpxcj /rt1Dc6CKrWqkMwZE8aEMx9FiKaUOjGs5mQ/w++TiLzTLcnzE/MTj3ZxL 4HxeeWBBj3msjivR6OlOf/TbzoAyl04Z0u7FkxnjALmx9CkhLRv/hKmWY wauEffJCwMmUo/qLcFHIjo3yqTB1DMLPy/6TQWHzqJUfqgERXW9b90Jgg ZR9BxseJCcGRBXoB64IfCFQhLf58tmwrA2tOFh3h41ckvkvwM5Lypn3Df w==; X-CSE-ConnectionGUID: xzWdPOTMRze5h4GlwR9LAA== X-CSE-MsgGUID: eNtMGWaYS1GJz7SHZoK3Vw== X-IronPort-AV: E=McAfee;i="6800,10657,11518"; a="57279830" X-IronPort-AV: E=Sophos;i="6.17,278,1747724400"; d="scan'208";a="57279830" Received: from fmviesa002.fm.intel.com ([10.60.135.142]) by orvoesa110.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 11 Aug 2025 11:27:44 -0700 X-CSE-ConnectionGUID: GHFwvyOKQnuOlpTcv+/xeA== X-CSE-MsgGUID: 1JQeJa6fSo6JlEu+sksadQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.17,278,1747724400"; d="scan'208";a="189658378" Received: from kanliang-dev.jf.intel.com ([10.165.154.102]) by fmviesa002.fm.intel.com with ESMTP; 11 Aug 2025 11:27:42 -0700 From: kan.liang@linux.intel.com To: peterz@infradead.org, mingo@redhat.com, acme@kernel.org, namhyung@kernel.org, irogers@google.com, linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, linux-s390@vger.kernel.org Cc: Kan Liang , Sumanth Korikkar Subject: [PATCH] perf: Fix the POLL_HUP delivery breakage Date: Mon, 11 Aug 2025 11:26:44 -0700 Message-Id: <20250811182644.1305952-1-kan.liang@linux.intel.com> X-Mailer: git-send-email 2.38.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Kan Liang The event_limit can be set by the PERF_EVENT_IOC_REFRESH to limit the number of events. When the event_limit reaches 0, the POLL_HUP signal should be sent. But it's missed. The corresponding counter should be stopped when the event_limit reaches 0. It was implemented in the ARCH-specific code. However, since the commit 9734e25fbf5a ("perf: Fix the throttle logic for a group"), all the ARCH-specific code has been moved to the generic code. The code to handle the event_limit was lost. Add the event->pmu->stop(event, 0); back. Fixes: 9734e25fbf5a ("perf: Fix the throttle logic for a group") Closes: https://lore.kernel.org/lkml/aICYAqM5EQUlTqtX@li-2b55cdcc-350b-11b2= -a85c-a78bff51fc11.ibm.com/ Reported-by: Sumanth Korikkar Tested-by: Sumanth Korikkar Signed-off-by: Kan Liang --- kernel/events/core.c | 1 + 1 file changed, 1 insertion(+) diff --git a/kernel/events/core.c b/kernel/events/core.c index dd8cf3c7fb7a..ec19c456b66d 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -10378,6 +10378,7 @@ static int __perf_event_overflow(struct perf_event = *event, ret =3D 1; event->pending_kill =3D POLL_HUP; perf_event_disable_inatomic(event); + event->pmu->stop(event, 0); } =20 if (event->attr.sigtrap) { --=20 2.38.1