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 E9F82C3600B for ; Thu, 27 Mar 2025 10:41:08 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 90D6F10E2C2; Thu, 27 Mar 2025 10:41:08 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.b="gXJ0SesR"; dkim-atps=neutral Received: from nyc.source.kernel.org (nyc.source.kernel.org [147.75.193.91]) by gabe.freedesktop.org (Postfix) with ESMTPS id 859BA10E2C2 for ; Thu, 27 Mar 2025 10:41:07 +0000 (UTC) Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by nyc.source.kernel.org (Postfix) with ESMTP id 6F8EBA42504; Thu, 27 Mar 2025 10:35:34 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7E7FFC4CEDD; Thu, 27 Mar 2025 10:41:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1743072063; bh=Ezoe49kR7+OTzs5Hu3HjQWUKC5r7LalD1FQSkG40hI0=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=gXJ0SesR6wUH4598bnHQ4Ur78SiVbJfRciil3jI953+nAb4Wnh3eJLJy4F/P2Hync 5K0d05eliuk9rIvVoojlzmTCF9zhNTTxnnhJ7dRX/F2na+imaA4BGiPKPObQFgs5+u GkcM3nlweZsZabZ5DWHnqht7mEMuz8ri5mg40+GMRgDfxmE5zCvsPteFnMtTUy85DE cREaUCUdPx7LrM+3SDxnRy97zQBESYIIq4qAI6cC1ZGErpki/l4m5mohbUOFpmNcHN Bs9I6pJ7quPYXjYXjp+Swh4ES6mDY/niq1vojGp7rFrYrn6Hh4e3ASkD5MZ0ppfZFP c4FiAdHIjjikw== Date: Thu, 27 Mar 2025 11:40:58 +0100 From: Ingo Molnar To: Linus Torvalds Cc: Bert Karwatzki , Christian =?iso-8859-1?Q?K=F6nig?= , Balbir Singh , Kees Cook , Bjorn Helgaas , Peter Zijlstra , Andy Lutomirski , Alex Deucher , linux-kernel@vger.kernel.org, amd-gfx@lists.freedesktop.org Subject: Re: commit 7ffb791423c7 breaks steam game Message-ID: References: <20250325101424.4478-1-spasswolf@web.de> <64945196-f05f-478e-a2b5-f0bd58345136@amd.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-BeenThere: amd-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Discussion list for AMD gfx List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: amd-gfx-bounces@lists.freedesktop.org Sender: "amd-gfx" * Linus Torvalds wrote: > On Wed, 26 Mar 2025 at 15:00, Bert Karwatzki wrote: > > > > As Balbir Singh found out this memory comes from amdkfd > > (kgd2kfd_init_zone_device()) with CONFIG_HSA_AMD_SVM=y. The memory gets placed > > by devm_request_free_mem_region() which places the memory at the end of the > > physical address space (DIRECT_MAP_PHYSMEM_END). DIRECT_MAP_PHYSMEM_END changes > > when using nokaslr and so the memory shifts. > > So I just want to say that having followed the thread as a spectator, > big kudos to everybody involved in this thing. Particularly to you, > Bart, for all your debugging and testing, and to Balbir for following > up and figuring it out. > > Because this was a strange one. I'd like to second that praise - Bert went above and beyond what could be expected from or even hoped from someone who reports a regression that broke his machine. Also, Balbir diligently followed down the regression to a root cause that was far away from his original code of interest. It was nice to lurk in this thread. Thanks, Ingo