From patchwork Fri Oct 23 12:21:28 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Daniel Vetter X-Patchwork-Id: 11852893 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id A434E1580 for ; Fri, 23 Oct 2020 12:22:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7EF3821527 for ; Fri, 23 Oct 2020 12:22:44 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=ffwll.ch header.i=@ffwll.ch header.b="QRe2K4ND" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S463619AbgJWMWn (ORCPT ); Fri, 23 Oct 2020 08:22:43 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37932 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S463616AbgJWMWn (ORCPT ); Fri, 23 Oct 2020 08:22:43 -0400 Received: from mail-wm1-x342.google.com (mail-wm1-x342.google.com [IPv6:2a00:1450:4864:20::342]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C691AC0613D2 for ; Fri, 23 Oct 2020 05:22:42 -0700 (PDT) Received: by mail-wm1-x342.google.com with SMTP id e2so1303797wme.1 for ; Fri, 23 Oct 2020 05:22:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ffwll.ch; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=Oo+WCqNcRY4hz8ARHU44AzglCk3LcvfnVh+Q+d4r9RU=; b=QRe2K4NDzMa3XvVHnklPYEQBWwaTYYKSqPpSchH+IzdO7uoZMOJmLrYKxFyPuFedgt hBGRQ8jSDsXFVPkf4tno5kbL04YE1J5uETPopMp2haTMemX81cxn8GM2SG8tLS8LW1Tq 3bmfMo7wGggEbrwFcrXY/XzlIA2yGcA0FzNrU= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=Oo+WCqNcRY4hz8ARHU44AzglCk3LcvfnVh+Q+d4r9RU=; b=SeHkQeL5rblOSGLIuTUkYviPikB/WDBp+42rzYoRSBV4pYNX5AAn+bBYZ71nyXqjKy yQFTAc807S96rCOSP+4gpJgyKiPeWdtg+HHWLyXxz1iDYPFH6DOCIp1q/FWGgfNR+0bn zjrRwHBwZftmX0ZO5YRNDYWrfLMQMnT/MuKuSpjZd814EqxWC6GxEmNaD5w9mRsmfgwX egWBmVebfjyYviEhePryBNUe2ZJckHmMF7r/LZn0zjW8IRabqBAs2XKtorhgvr3hwCfe qJd7CIpQC8exWBaZnYmpHylW4fe4ALNFIPi1fyJ4sC9lVYW7jNvIkN5a3uIwJ1u1wvhX UlSg== X-Gm-Message-State: AOAM532h3/ipdJZ4Lg5lJ0YUBp9ebfpZ56+U4PbQfQJKKDr3FMfBPFek 3uYfWNXN1T6+gXW0IpLj74Ld9De90R9QaoAn X-Google-Smtp-Source: ABdhPJxmIrYyotlMUykKvZ8yFRoXhmXv4OuqQiJQL/V4ipGjIXJX6Lq0IMzK4dvfWtQS6XzUEHIJNg== X-Received: by 2002:a7b:c401:: with SMTP id k1mr2023294wmi.120.1603455761598; Fri, 23 Oct 2020 05:22:41 -0700 (PDT) Received: from phenom.ffwll.local ([2a02:168:57f4:0:efd0:b9e5:5ae6:c2fa]) by smtp.gmail.com with ESMTPSA id y4sm3056484wrp.74.2020.10.23.05.22.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 23 Oct 2020 05:22:41 -0700 (PDT) From: Daniel Vetter To: DRI Development Cc: Intel Graphics Development , Daniel Vetter , linux-media@vger.kernel.org, linaro-mm-sig@lists.linaro.org, linux-rdma@vger.kernel.org, amd-gfx@lists.freedesktop.org, Chris Wilson , Maarten Lankhorst , =?utf-8?q?Christian_?= =?utf-8?q?K=C3=B6nig?= , Daniel Vetter Subject: [PATCH 17/65] drm/scheduler: use dma-fence annotations in main thread Date: Fri, 23 Oct 2020 14:21:28 +0200 Message-Id: <20201023122216.2373294-17-daniel.vetter@ffwll.ch> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20201023122216.2373294-1-daniel.vetter@ffwll.ch> References: <20201021163242.1458885-1-daniel.vetter@ffwll.ch> <20201023122216.2373294-1-daniel.vetter@ffwll.ch> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org If the scheduler rt thread gets stuck on a mutex that we're holding while waiting for gpu workloads to complete, we have a problem. Add dma-fence annotations so that lockdep can check this for us. I've tried to quite carefully review this, and I think it's at the right spot. But obviosly no expert on drm scheduler. Cc: linux-media@vger.kernel.org Cc: linaro-mm-sig@lists.linaro.org Cc: linux-rdma@vger.kernel.org Cc: amd-gfx@lists.freedesktop.org Cc: intel-gfx@lists.freedesktop.org Cc: Chris Wilson Cc: Maarten Lankhorst Cc: Christian König Signed-off-by: Daniel Vetter --- drivers/gpu/drm/scheduler/sched_main.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/gpu/drm/scheduler/sched_main.c b/drivers/gpu/drm/scheduler/sched_main.c index 9a0d77a68018..f69abc4e70d3 100644 --- a/drivers/gpu/drm/scheduler/sched_main.c +++ b/drivers/gpu/drm/scheduler/sched_main.c @@ -764,9 +764,12 @@ static int drm_sched_main(void *param) { struct drm_gpu_scheduler *sched = (struct drm_gpu_scheduler *)param; int r; + bool fence_cookie; sched_set_fifo_low(current); + fence_cookie = dma_fence_begin_signalling(); + while (!kthread_should_stop()) { struct drm_sched_entity *entity = NULL; struct drm_sched_fence *s_fence; @@ -824,6 +827,9 @@ static int drm_sched_main(void *param) wake_up(&sched->job_scheduled); } + + dma_fence_end_signalling(fence_cookie); + return 0; }