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[23.128.96.18]) by mx.google.com with ESMTP id i27si3926647ejb.63.2020.05.21.12.12.22; Thu, 21 May 2020 12:12:45 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=pass header.i=@nvidia.com header.s=n1 header.b=iiOwP15g; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=nvidia.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730105AbgEUTLC (ORCPT + 99 others); Thu, 21 May 2020 15:11:02 -0400 Received: from hqnvemgate24.nvidia.com ([216.228.121.143]:13876 "EHLO hqnvemgate24.nvidia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729856AbgEUTLC (ORCPT ); Thu, 21 May 2020 15:11:02 -0400 Received: from hqpgpgate102.nvidia.com (Not Verified[216.228.121.13]) by hqnvemgate24.nvidia.com (using TLS: TLSv1.2, DES-CBC3-SHA) id ; Thu, 21 May 2020 12:08:37 -0700 Received: from hqmail.nvidia.com ([172.20.161.6]) by hqpgpgate102.nvidia.com (PGP Universal service); Thu, 21 May 2020 12:11:02 -0700 X-PGP-Universal: processed; by hqpgpgate102.nvidia.com on Thu, 21 May 2020 12:11:02 -0700 Received: from [10.2.48.182] (10.124.1.5) by HQMAIL107.nvidia.com (172.20.187.13) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Thu, 21 May 2020 19:11:01 +0000 Subject: Re: [PATCH 0/4] mm/gup, drm/i915: refactor gup_fast, convert to pin_user_pages() To: Chris Wilson , Andrew Morton CC: Souptick Joarder , Matthew Wilcox , Jani Nikula , Joonas Lahtinen , Rodrigo Vivi , David Airlie , Daniel Vetter , Tvrtko Ursulin , Matthew Auld , , , LKML , References: <20200519002124.2025955-1-jhubbard@nvidia.com> <159008745422.32320.5724805750977048669@build.alporthouse.com> X-Nvconfidentiality: public From: John Hubbard Message-ID: Date: Thu, 21 May 2020 12:11:00 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.8.0 MIME-Version: 1.0 In-Reply-To: <159008745422.32320.5724805750977048669@build.alporthouse.com> X-Originating-IP: [10.124.1.5] X-ClientProxiedBy: HQMAIL105.nvidia.com (172.20.187.12) To HQMAIL107.nvidia.com (172.20.187.13) Content-Type: text/plain; charset="utf-8"; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nvidia.com; s=n1; t=1590088117; bh=aBRert5zTUjO3CDnuWETRlzl2UkyVdUVUVTCJIf9+7M=; h=X-PGP-Universal:Subject:To:CC:References:X-Nvconfidentiality:From: Message-ID:Date:User-Agent:MIME-Version:In-Reply-To: X-Originating-IP:X-ClientProxiedBy:Content-Type:Content-Language: Content-Transfer-Encoding; b=iiOwP15g5WTdYZsrZXzHQiwkXMR7CF90OctL3JsApwPFGvyE44Gcmf7EM1pO3ECnc OJzF6eau+CefBy6Ad////MwpNwmH4SJPVKtl0VEe+76F45oxwAKJtzJ8P+M48rzcrt Glhwp/ft/bEKWBo8jTcnZFpeUmktlboEh18+FRG9SXBq3i13BoPfkoZth1DvQUXbxq /76ilrAZ0PCTX/QC+7qUQWS5gD0kas/fTD2u8V5E87L1Hk8YABJQXUAGBV8O3IeCND cs6Co7+1vU4sf+4mQ4YJUyMLVkUyLmHFiWoYZFchzbFik7uZTSQfBmjBPVZcb+sE0m qssa/GT7C0RCg== Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2020-05-21 11:57, Chris Wilson wrote: > Quoting John Hubbard (2020-05-19 01:21:20) >> This needs to go through Andrew's -mm tree, due to adding a new gup.c >> routine. However, I would really love to have some testing from the >> drm/i915 folks, because I haven't been able to run-time test that part >> of it. > > CI hit > > <4> [185.667750] WARNING: CPU: 0 PID: 1387 at mm/gup.c:2699 internal_get_user_pages_fast+0x63a/0xac0 > <4> [185.667752] Modules linked in: vgem snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic i915 mei_hdcp x86_pkg_temp_thermal coretemp snd_hda_intel snd_intel_dspcfg crct10dif_pclmul snd_hda_codec crc32_pclmul snd_hwdep snd_hda_core ghash_clmulni_intel cdc_ether usbnet mii snd_pcm e1000e mei_me ptp pps_core mei intel_lpss_pci prime_numbers > <4> [185.667774] CPU: 0 PID: 1387 Comm: gem_userptr_bli Tainted: G U 5.7.0-rc5-CI-Patchwork_17704+ #1 > <4> [185.667777] Hardware name: Intel Corporation Ice Lake Client Platform/IceLake U DDR4 SODIMM PD RVP, BIOS ICLSFWR1.R00.3234.A01.1906141750 06/14/2019 > <4> [185.667782] RIP: 0010:internal_get_user_pages_fast+0x63a/0xac0 > <4> [185.667785] Code: 24 40 08 48 39 5c 24 38 49 89 df 0f 85 74 fc ff ff 48 83 44 24 50 08 48 39 5c 24 58 49 89 dc 0f 85 e0 fb ff ff e9 14 fe ff ff <0f> 0b b8 ea ff ff ff e9 36 fb ff ff 4c 89 e8 48 21 e8 48 39 e8 0f > <4> [185.667789] RSP: 0018:ffffc90001133c38 EFLAGS: 00010206 > <4> [185.667792] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff8884999ee800 > <4> [185.667795] RDX: 00000000000c0001 RSI: 0000000000000100 RDI: 00007f419e774000 > <4> [185.667798] RBP: ffff888453dbf040 R08: 0000000000000000 R09: 0000000000000001 > <4> [185.667800] R10: 0000000000000000 R11: 0000000000000000 R12: ffff888453dbf380 > <4> [185.667803] R13: ffff8884999ee800 R14: ffff888453dbf3e8 R15: 0000000000000040 > <4> [185.667806] FS: 00007f419e875e40(0000) GS:ffff88849fe00000(0000) knlGS:0000000000000000 > <4> [185.667808] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > <4> [185.667811] CR2: 00007f419e873000 CR3: 0000000458bd2004 CR4: 0000000000760ef0 > <4> [185.667814] PKRU: 55555554 > <4> [185.667816] Call Trace: > <4> [185.667912] ? i915_gem_userptr_get_pages+0x1c6/0x290 [i915] > <4> [185.667918] ? mark_held_locks+0x49/0x70 > <4> [185.667998] ? i915_gem_userptr_get_pages+0x1c6/0x290 [i915] > <4> [185.668073] ? i915_gem_userptr_get_pages+0x1c6/0x290 [i915] > > and then panicked, across a range of systems. > -Chris > Thanks for this report! I'm looking into it now. thanks, -- John Hubbard NVIDIA