From nobody Tue Apr 7 22:01:08 2026 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9103AC43217 for ; Wed, 19 Oct 2022 17:34:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229779AbiJSReI (ORCPT ); Wed, 19 Oct 2022 13:34:08 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:32832 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231312AbiJSRdt (ORCPT ); Wed, 19 Oct 2022 13:33:49 -0400 Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 52E141D3A76; Wed, 19 Oct 2022 10:33:41 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1666200821; x=1697736821; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=lqVOHpteUQeCev/lgNedZY6IzAYCvefhlH9jg3GlMDs=; b=jPHY5/x81a0xSghusQWgWUnxMIGI7eLUovAd9IlxAWf5rqfxRx1xCiI2 RjrUvZSjLoHukW1LCkOV0gvbidoHk0kctR/TEGE+maw5hYYDWPYXTRaXN xNDGBXcv7lHbZj9cSkghu46jEnHPEG899xZCm2jQY+M17Sk5XhwEhlXI/ mYdNUl2d8JptTdxYql1l54S0NsYKBbqasHTjI+bpJyjMuOnIoXMNkQW7w gn/X0pnfX0D5YjEGcvpvTgzBC2XVwNh+Ql+aRff++nfimRWLeBq5nZFmB WnASx8D0asUFzc5Z5/gIJ4FULwnKMA0mKgtpJCG8GX15DlxhARfmxq0W+ A==; X-IronPort-AV: E=McAfee;i="6500,9779,10505"; a="306474406" X-IronPort-AV: E=Sophos;i="5.95,196,1661842800"; d="scan'208";a="306474406" Received: from orsmga006.jf.intel.com ([10.7.209.51]) by fmsmga103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 19 Oct 2022 10:33:39 -0700 X-IronPort-AV: E=McAfee;i="6500,9779,10505"; a="607204754" X-IronPort-AV: E=Sophos;i="5.95,196,1661842800"; d="scan'208";a="607204754" Received: from mjmcener-mobl1.amr.corp.intel.com (HELO localhost.localdomain) ([10.213.233.40]) by orsmga006-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 19 Oct 2022 10:33:36 -0700 From: Tvrtko Ursulin To: Intel-gfx@lists.freedesktop.org Cc: cgroups@vger.kernel.org, linux-kernel@vger.kernel.org, Tejun Heo , Johannes Weiner , Zefan Li , Dave Airlie , Daniel Vetter , Rob Clark , =?UTF-8?q?St=C3=A9phane=20Marchesin?= , "T . J . Mercier" , Kenny.Ho@amd.com, =?UTF-8?q?Christian=20K=C3=B6nig?= , Brian Welty , Tvrtko Ursulin Subject: [RFC 06/17] drm: Only track clients which are providing drm_cgroup_ops Date: Wed, 19 Oct 2022 18:32:43 +0100 Message-Id: <20221019173254.3361334-7-tvrtko.ursulin@linux.intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20221019173254.3361334-1-tvrtko.ursulin@linux.intel.com> References: <20221019173254.3361334-1-tvrtko.ursulin@linux.intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" From: Tvrtko Ursulin To reduce the number of tracking going on, especially with drivers which will not support any sort of control from the drm cgroup controller side, lets express the funcionality as opt-in and use the presence of drm_cgroup_ops as activation criteria. Signed-off-by: Tvrtko Ursulin --- drivers/gpu/drm/drm_cgroup.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/gpu/drm/drm_cgroup.c b/drivers/gpu/drm/drm_cgroup.c index 0fbb88f08cef..7ed9c7150cae 100644 --- a/drivers/gpu/drm/drm_cgroup.c +++ b/drivers/gpu/drm/drm_cgroup.c @@ -16,6 +16,9 @@ void drm_clients_close(struct drm_file *file_priv) =20 lockdep_assert_held(&dev->filelist_mutex); =20 + if (!dev->driver->cg_ops) + return; + clients =3D xa_load(&drm_pid_clients, pid); list_del_rcu(&file_priv->clink); if (atomic_dec_and_test(&clients->num)) { @@ -40,6 +43,9 @@ int drm_clients_open(struct drm_file *file_priv) =20 lockdep_assert_held(&dev->filelist_mutex); =20 + if (!dev->driver->cg_ops) + return 0; + clients =3D xa_load(&drm_pid_clients, pid); if (!clients) { clients =3D kmalloc(sizeof(*clients), GFP_KERNEL); --=20 2.34.1