From mboxrd@z Thu Jan 1 00:00:00 1970 From: bugzilla-daemon@freedesktop.org Subject: [Bug 107065] "BUG: unable to handle kernel paging request at 0000000000002000" in amdgpu_vm_cpu_set_ptes at amdgpu_vm.c:921 Date: Mon, 02 Jul 2018 03:11:27 +0000 Message-ID: References: Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============0320341546==" Return-path: Received: from culpepper.freedesktop.org (culpepper.freedesktop.org [131.252.210.165]) by gabe.freedesktop.org (Postfix) with ESMTP id C44146E133 for ; Mon, 2 Jul 2018 03:11:27 +0000 (UTC) In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" To: dri-devel@lists.freedesktop.org List-Id: dri-devel@lists.freedesktop.org --===============0320341546== Content-Type: multipart/alternative; boundary="15305010870.bE5D080bd.5479" Content-Transfer-Encoding: 7bit --15305010870.bE5D080bd.5479 Date: Mon, 2 Jul 2018 03:11:27 +0000 MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://bugs.freedesktop.org/ Auto-Submitted: auto-generated https://bugs.freedesktop.org/show_bug.cgi?id=3D107065 --- Comment #10 from Andrey Grodzovsky --- Created attachment 140418 --> https://bugs.freedesktop.org/attachment.cgi?id=3D140418&action=3Dedit drm/amdgpu: Verify root PD is mapped into kernel address space. dwagner, please try this patch. Fixes the issue for me and I observed no suspend/resume issues. Christian, please take a look at the patch, problem was that in amdgpu_vm_update_directories the parent BO didn't have a kernel mapping and= so later inside amdgpu_vm_cpu_set_ptes=20 pe +=3D (unsigned long)amdgpu_bo_kptr(bo); would equal to 0000000000002000= since=20 parent amdgpu_bo_kptr woudld return NULL. The parent was the root PD.=20 This was still working in 67b8d5c Linus Torvalds 7 weeks ago Linux 4.17-rc5 (tag: v4.17-rc5) but I wasn't able to exactly pinpoint which cha= nge broke it. I am not sure my fix is the right one so please advise. --=20 You are receiving this mail because: You are the assignee for the bug.= --15305010870.bE5D080bd.5479 Date: Mon, 2 Jul 2018 03:11:27 +0000 MIME-Version: 1.0 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://bugs.freedesktop.org/ Auto-Submitted: auto-generated

Comme= nt # 10 on bug 10706= 5 from Andrey Grodzovsky 
Created attachment 140418 [details] [review]
drm/amdgpu: Verify root PD is mapped into kernel address space.

dwagner, please try this patch. Fixes the issue for me and I observed no
suspend/resume issues.

Christian, please take a look at the patch, problem was that in
amdgpu_vm_update_directories the parent BO didn't have a kernel mapping and=
 so
later inside amdgpu_vm_cpu_set_ptes=20
pe +=3D (unsigned long)amdgpu_bo_kptr(bo); would equal to  0000000000002000=
 since=20
parent amdgpu_bo_kptr woudld return NULL. The parent was the root PD.=20

This was still working in 67b8d5c Linus Torvalds      7 weeks ago    Linux
4.17-rc5   (tag: v4.17-rc5) but I wasn't able to exactly pinpoint which cha=
nge
broke it. I am not sure my fix is the right one so please advise.

You are receiving this mail because:
  • You are the assignee for the bug.
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