From patchwork Fri Jan 22 11:21:12 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chris Wilson X-Patchwork-Id: 12039007 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8A509C433E0 for ; Fri, 22 Jan 2021 11:21:23 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id C865A235DD for ; Fri, 22 Jan 2021 11:21:21 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C865A235DD Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=chris-wilson.co.uk Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=intel-gfx-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 3EBDE6E1B1; Fri, 22 Jan 2021 11:21:21 +0000 (UTC) Received: from fireflyinternet.com (unknown [77.68.26.236]) by gabe.freedesktop.org (Postfix) with ESMTPS id 1E6B96E1B1 for ; Fri, 22 Jan 2021 11:21:19 +0000 (UTC) X-Default-Received-SPF: pass (skip=forwardok (res=PASS)) x-ip-name=78.156.65.138; Received: from build.alporthouse.com (unverified [78.156.65.138]) by fireflyinternet.com (Firefly Internet (M1)) with ESMTP id 23669935-1500050 for multiple; Fri, 22 Jan 2021 11:21:12 +0000 From: Chris Wilson To: intel-gfx@lists.freedesktop.org Date: Fri, 22 Jan 2021 11:21:12 +0000 Message-Id: <20210122112112.6589-1-chris@chris-wilson.co.uk> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH] drm/i915/gt: Move the defer_request waiter active assertion 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: , Cc: Chris Wilson Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" In defer_request() we start with the request we just unsubmitted (that should be the active request on the gpu) and then defer all of its waiters. No waiter should be ahead of the active request, so none should be marked as active. That assert failed. Of particular note this machine was undergoing persistent GPU result due to underlying HW issues, so that may be a clue. A request is also marked as active when it is retired, regardless of current queue status, and so this assertion failure may be a result of the queue being completed by the reset and then subsequently processed by the tasklet. We can filter out retired requests here by doing the assertion check after the is-ready check (active is a subset of being ready). Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/2978 Signed-off-by: Chris Wilson --- drivers/gpu/drm/i915/gt/intel_execlists_submission.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/gt/intel_execlists_submission.c b/drivers/gpu/drm/i915/gt/intel_execlists_submission.c index 3e680bfa9d13..0eafa37c03e7 100644 --- a/drivers/gpu/drm/i915/gt/intel_execlists_submission.c +++ b/drivers/gpu/drm/i915/gt/intel_execlists_submission.c @@ -1063,7 +1063,6 @@ static void defer_request(struct i915_request *rq, struct list_head * const pl) __i915_request_has_started(w) && !__i915_request_is_complete(rq)); - GEM_BUG_ON(i915_request_is_active(w)); if (!i915_request_is_ready(w)) continue; @@ -1071,6 +1070,7 @@ static void defer_request(struct i915_request *rq, struct list_head * const pl) continue; GEM_BUG_ON(rq_prio(w) > rq_prio(rq)); + GEM_BUG_ON(i915_request_is_active(w)); list_move_tail(&w->sched.link, &list); }