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 56EF3E9B269 for ; Tue, 24 Feb 2026 14:15:48 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id E6A6A10E58D; Tue, 24 Feb 2026 14:15:47 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; secure) header.d=linutronix.de header.i=@linutronix.de header.b="O+8vHw3G"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="SmxFH0D4"; dkim-atps=neutral Received: from galois.linutronix.de (Galois.linutronix.de [193.142.43.55]) by gabe.freedesktop.org (Postfix) with ESMTPS id 2156410E300; Tue, 24 Feb 2026 14:15:46 +0000 (UTC) Date: Tue, 24 Feb 2026 15:15:42 +0100 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1771942544; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=dNjYeM6hGv29WKg9kWtLMN+jylLCTcklCbR6s8aADa4=; b=O+8vHw3Gs8uRydlSqYfu9x2XLKlANTrfVM1Q/H2ZyTV0vrs2DFan+nNsqofOL/LmqJLXAM 1yrRFVImChO6kNDkVxwLhXmAusOaNjJk7wFN7OE2S/puHKCYWb+zEK/WbqLbDYBVjPSR7L o1J7QLgzh+I5kObHcEtTkbA7+hLxNxLzKzDH9+4HdqUSDFF/n6r/mYgW+2hMKxtmDcPgub uSyTiNRkalGS0CzzSY6aKt1m6ziaZi61jFYUEnknUNOga0nPq4NwepUacda4KX+MoJzHQK fhjj6XhabvPIWaejFSv/ctdH3rfDO5t4qCdKXX/NPDfaJaXKHUqDwz9hjdV4Xg== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1771942544; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=dNjYeM6hGv29WKg9kWtLMN+jylLCTcklCbR6s8aADa4=; b=SmxFH0D4T4i5DkM1Skr6VX9HCGXcn+1/b1CcRsM9dVfwNt/7OU9p0T4SyCv7c7Skdedqcj Grq9uKXvgF4VRTBg== From: Sebastian Andrzej Siewior To: Maarten Lankhorst Cc: intel-gfx@lists.freedesktop.org, intel-xe@lists.freedesktop.org, linux-rt-devel@lists.linux.dev, dri-devel@lists.freedesktop.org Subject: Re: [i915-rt v6 24/24] FOR-CI: bump MAX_STACK_TRACE_ENTRIES Message-ID: <20260224141542.cDL_xEWb@linutronix.de> References: <20260220083657.28815-26-dev@lankhorst.se> <20260220083657.28815-50-dev@lankhorst.se> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable In-Reply-To: <20260220083657.28815-50-dev@lankhorst.se> 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" On 2026-02-20 09:37:22 [+0100], Maarten Lankhorst wrote: > We're hitting a bug in CI where MAX_STACK_TRACE_ENTRIES is set too low. > My guess is the repeated loading/unloading is creating multiples of the > same entries. As a hack just reset lockdep. This might only be necessary > for CI + PREEMPT_RT. spinlock_t on PREEMPT_RT uses the rtmutex which from lockdep's point of view counts twice: The "logical" lock and the inner wait lock. That makes twice as many locks. I hope it is this and not some accounting error=E2=80=A6 > Signed-off-by: Maarten Lankhorst Sebastian