From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 796C9CA5FA5 for ; Tue, 29 Sep 2026 19:01:56 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id EC33510F03F; Tue, 29 Sep 2026 19:01:55 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="RwB7kdAK"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.18]) by gabe.freedesktop.org (Postfix) with ESMTPS id E9D4510F047 for ; Tue, 29 Sep 2026 19:01:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1790708514; x=1822244514; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=TZ+IbRuJBNes2lQp/jp1z7sluVd/xZBvail09qI/Nkw=; b=RwB7kdAKcA2d0viQIilW5V9YYV3NGREy4BNcCMxXzcNSfEDVUTe5WhFR BnXwGl4NiKO2kxXhwWvf7G7LSzB4chKfqfIvOSjXZ917naWS0M7UWcza3 fTguSHU83MOlDGftc7Ibimmh+jUcGQefuKipxwgFzgUmmGkMfS8jaeoyI r1xqN3GHhW6PvtzFFJLa0oE851IMEn0f4TkLoGE6tkz83p2ODGHrYuFH1 9wRzPku+Sd9ACDkVgpn52IeKJvZn/lZUECtrGe0DhJZFKNKck7V2mfvgu mujDa88IPTSzWD+oVYsANq3qMIqvY5Po1+VlEIewhLVwyz7BpRqBBJG+R Q==; X-CSE-ConnectionGUID: RbBcBW7QRs2G5RJg8RYBOw== X-CSE-MsgGUID: CaVNoz9PS1OJJ06tf0ccEQ== X-IronPort-AV: E=McAfee;i="6800,10657,11920"; a="90564108" X-IronPort-AV: E=Sophos;i="6.27,130,1787036400"; d="scan'208";a="90564108" Received: from fmviesa006.fm.intel.com ([10.60.135.146]) by fmvoesa112.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 Sep 2026 12:01:53 -0700 X-CSE-ConnectionGUID: LSNc+k6IR/GRnXgQLNteEw== X-CSE-MsgGUID: HU6jW5ehR0ODT9gzcqu8Rw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.27,130,1787036400"; d="scan'208";a="274062213" Received: from orsosgc001.jf.intel.com ([10.54.56.63]) by fmviesa006-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 Sep 2026 12:01:53 -0700 From: Umesh Nerlige Ramappa To: intel-gfx@lists.freedesktop.org, vinay.belgaumkar@intel.com Cc: dev@lankhorst.se Subject: [PATCH 0/3] Fixup deadlock scenarios in the PMU path Date: Tue, 29 Sep 2026 12:01:48 -0700 Message-ID: <20260929190147.2886670-5-umesh.nerlige.ramappa@intel.com> X-Mailer: git-send-email 2.55.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" Based on one user report bug regarding a deadlock in the guc_engine_busyness path, this series fixes such scenarios. v2: - Disable pmu on PREEMPT_RT kernels - Review comments from v1 Signed-off-by: Umesh Nerlige Ramappa Maarten Lankhorst (1): drm/i915/pmu: Disable on PREEMPT_RT Umesh Nerlige Ramappa (2): drm/i915/guc: Use a delayed wakeref put in guc_engine_busyness() drm/i915/pmu: Use a delayed wakeref put in get_rc6() drivers/gpu/drm/i915/gt/intel_gt_pm.h | 24 +++++++++++++++++++ .../gpu/drm/i915/gt/uc/intel_guc_submission.c | 7 +++++- drivers/gpu/drm/i915/i915_pmu.c | 21 +++++++++++++++- 3 files changed, 50 insertions(+), 2 deletions(-) -- 2.55.0