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 1140BD12D5F for ; Wed, 3 Dec 2025 13:36:18 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id CBD8A10E7E2; Wed, 3 Dec 2025 13:36:17 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="HDR5n6w3"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.8]) by gabe.freedesktop.org (Postfix) with ESMTPS id 6A72410E123; Wed, 3 Dec 2025 13:36:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1764768976; x=1796304976; h=from:to:cc:subject:in-reply-to:references:date: message-id:mime-version; bh=D4wpFHPA+FGGUzUx1VmzoaeL9TkCmQVcOmbY0jYZGiM=; b=HDR5n6w3PxqHrqWzl2eMRVDlgqUABvJLOEbloR/cnCQy58Ai5iG+du+A Wy/bLEkmHwySBNDI1KehRmEdx6uD+DNhbrYQvSR2G/7SfPoYT8vtH1jTF zdK0PTTdoXT6QfJhdwJyia2T8JdSE65rV2e0tGnJb+a32AJrM1P7XaUMf gT1t4iVh1N94+Sn9hUzSGuuhtnqXhCHo9n2bWaNhNnuTOXhBuCd/Sm/0b H96eENI4i4giXAz+k/U75tRjx438Wiw9IwaBvFQmF5Op/u6cI6fazAPFX H8bcc/ZRe3rLk29IExowyqB/iH3VcceME4+/hgT68kvuZdfUS/vC5bO/w A==; X-CSE-ConnectionGUID: UNAiyBGLT5az4DTLbSsiIQ== X-CSE-MsgGUID: kyCkoBE/RZqpqmcvfj8Gvg== X-IronPort-AV: E=McAfee;i="6800,10657,11631"; a="84353553" X-IronPort-AV: E=Sophos;i="6.20,246,1758610800"; d="scan'208";a="84353553" Received: from orviesa007.jf.intel.com ([10.64.159.147]) by fmvoesa102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 03 Dec 2025 05:36:16 -0800 X-CSE-ConnectionGUID: ZSt/L78JTma6XSExcNMW/A== X-CSE-MsgGUID: 72Zg5L9nQfmljVMQepAE/g== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.20,246,1758610800"; d="scan'208";a="194707155" Received: from mjarzebo-mobl1.ger.corp.intel.com (HELO localhost) ([10.245.246.226]) by orviesa007-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 03 Dec 2025 05:36:12 -0800 From: Jani Nikula To: "Borah, Chaitanya Kumar" , brauner@kernel.org Cc: "intel-gfx@lists.freedesktop.org" , "intel-xe@lists.freedesktop.org" , "Saarinen, Jani" , "Kurmi, Suresh Kumar" , Thorsten Leemhuis , Ville =?utf-8?B?U3lyasOkbMOk?= , "Rafael J. Wysocki" , Pavel Machek , linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: BISECTED REGRESSION on v6.18 (was: REGRESSION on drm-tip) In-Reply-To: Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo References: <03c013c0-be12-42ab-91d1-f87395c890e3@intel.com> Date: Wed, 03 Dec 2025 15:36:09 +0200 Message-ID: <51f6228d8bb6df524995b5ad4c49cbdfcbafb952@intel.com> MIME-Version: 1.0 Content-Type: text/plain X-BeenThere: intel-xe@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel Xe graphics driver List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-xe-bounces@lists.freedesktop.org Sender: "Intel-xe" On Wed, 03 Dec 2025, Jani Nikula wrote: > On Thu, 27 Nov 2025, "Borah, Chaitanya Kumar" wrote: >> Hello Christian, >> >> This is Chaitanya (again!). >> >> This mail is regarding another regression we are seeing in our CI >> runs[1] on drm-tip (with both xe and i915). > > Referring to drm-tip is downplaying the problem. The bisected regression > is in v6.18 release. It's breaking suspend/resume across a lot of > platforms on two drivers, i915 and xe. > > a3f8f8662771 ("power: always freeze efivarfs") > > As far as regressions go, it's pretty bad. Please prioritize. Added some missing Cc's. > > > BR, > Jani. > > > >> >> ````````````````````````````````````````````````````````````````````````````````` >> <4> [157.687644] ------------[ cut here ]------------ >> <4> [157.687768] WARNING: CPU: 5 PID: 2277 at kernel/freezer.c:139 >> __set_task_frozen+0x7f/0xb0 >> ... >> <4> [157.687923] PKRU: 55555554 >> <4> [157.687924] Call Trace: >> <4> [157.687925] >> <4> [157.687926] ? __pfx___set_task_frozen+0x10/0x10 >> <4> [157.687929] task_call_func+0x6d/0x120 >> <4> [157.687932] ? cgroup_freezing+0x89/0x200 >> <4> [157.687937] freeze_task+0x98/0x100 >> <4> [157.687940] try_to_freeze_tasks+0xd2/0x440 >> <4> [157.687946] freeze_processes+0x56/0xd0 >> <4> [157.687948] hibernate+0x129/0x4a0 >> <4> [157.687951] state_store+0xd3/0xe0 >> <4> [157.687954] kobj_attr_store+0x12/0x40 >> <4> [157.687959] sysfs_kf_write+0x4d/0x80 >> <4> [157.687963] kernfs_fop_write_iter+0x188/0x240 >> <4> [157.687967] vfs_write+0x283/0x540 >> <4> [157.687969] ? free_to_partial_list+0x46d/0x640 >> <4> [157.687976] ksys_write+0x6f/0xf0 >> <4> [157.687980] __x64_sys_write+0x19/0x30 >> <4> [157.687982] x64_sys_call+0x79/0x26a0 >> <4> [157.687984] do_syscall_64+0x93/0xd60 >> <4> [157.687987] ? putname+0x65/0x90 >> <4> [157.687990] ? kmem_cache_free+0x553/0x680 >> <4> [157.687995] ? putname+0x65/0x90 >> <4> [157.687997] ? putname+0x65/0x90 >> <4> [157.687999] ? do_sys_openat2+0x8b/0xd0 >> <4> [157.688003] ? __x64_sys_openat+0x54/0xa0 >> <4> [157.688007] ? do_syscall_64+0x1b7/0xd60 >> <4> [157.688009] ? __fput+0x1bf/0x2f0 >> <4> [157.688012] ? fput_close_sync+0x3d/0xa0 >> <4> [157.688015] ? __x64_sys_close+0x3e/0x90 >> <4> [157.688017] ? do_syscall_64+0x1b7/0xd60 >> <4> [157.688019] ? putname+0x65/0x90 >> <4> [157.688021] ? putname+0x65/0x90 >> <4> [157.688023] ? do_sys_openat2+0x8b/0xd0 >> <4> [157.688024] ? __fput+0x1bf/0x2f0 >> <4> [157.688028] ? __x64_sys_openat+0x54/0xa0 >> <4> [157.688032] ? do_syscall_64+0x1b7/0xd60 >> <4> [157.688034] ? do_syscall_64+0x1b7/0xd60 >> <4> [157.688036] ? irqentry_exit+0x77/0xb0 >> <4> [157.688038] ? exc_page_fault+0xbd/0x2c0 >> <4> [157.688042] entry_SYSCALL_64_after_hwframe+0x76/0x7e >> <4> [157.688044] RIP: 0033:0x72523c91c574 >> ````````````````````````````````````````````````````````````````````````````````` >> Details log can be found in [2]. >> >> After bisecting the tree, the following patch [3] seems to be the first >> "bad" commit >> >> ````````````````````````````````````````````````````````````````````````````````````````````````````````` >> commit a3f8f8662771285511ae26c4c8d3ba1cd22159b9 >> Author: Christian Brauner >> Date: Wed Nov 5 14:39:45 2025 +0100 >> >> power: always freeze efivarfs >> ````````````````````````````````````````````````````````````````````````````````````````````````````````` >> >> We also verified that if we revert the patch the issue is not seen. >> >> Could you please check why the patch causes this regression and provide >> a fix if necessary? >> >> Thank you. >> >> Regards >> >> Chaitanya >> >> [1] >> https://intel-gfx-ci.01.org/tree/drm-tip/index.html?testfilter=suspend >> [2] >> https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_17595/shard-mtlp-6/igt@gem_exec_suspend@basic-s4-devices.html >> [3] >> https://gitlab.com/freedesktop-mirror/drm-tip/-/commit/a3f8f8662771285511ae26c4c8d3ba1cd22159b9 -- Jani Nikula, Intel