From mboxrd@z Thu Jan 1 00:00:00 1970 From: bugzilla-daemon@freedesktop.org Subject: [Bug 100306] System randomly freezes or crashes to the login screen, glitches until rebooted Date: Sat, 05 Aug 2017 13:31:44 +0000 Message-ID: References: Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============1356441762==" Return-path: Received: from culpepper.freedesktop.org (culpepper.freedesktop.org [131.252.210.165]) by gabe.freedesktop.org (Postfix) with ESMTP id 0A1006E45B for ; Sat, 5 Aug 2017 13:31:44 +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 --===============1356441762== Content-Type: multipart/alternative; boundary="15019399030.ce4fC.14137"; charset="UTF-8" --15019399030.ce4fC.14137 Date: Sat, 5 Aug 2017 13:31:43 +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=3D100306 --- Comment #37 from MirceaKitsune -= -- I briefly discussed the above log (output of "dmesg -w") on IRC with someone who seemed to have an understanding of the issue. They pointed out something important which I thought to highlight: The problem appears to start from 'radeon_vm_bo_invalidate' and is most lik= ely a GPU locking bug. Looking at the stack trace I can see it, alongside expli= cit mentions of spin lock / CPU soft lockup / stall on CPU. I've also noticed a potentially important message, which although marked as a warning seems to point to a line of source code from the radeon driver: [58857.640890] WARNING: CPU: 3 PID: 2549 at ../drivers/gpu/drm/radeon/radeon_object.c:84 radeon_ttm_bo_destroy+0xec/0xf0 [radeon] --=20 You are receiving this mail because: You are the assignee for the bug.= --15019399030.ce4fC.14137 Date: Sat, 5 Aug 2017 13:31:43 +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 # 37 on bug 10030= 6 from MirceaKitsune 
I briefly discussed the above log (output of "dmesg -w&qu=
ot;) on IRC with someone
who seemed to have an understanding of the issue. They pointed out something
important which I thought to highlight:

The problem appears to start from 'radeon_vm_bo_invalidate' and is most lik=
ely
a GPU locking bug. Looking at the stack trace I can see it, alongside expli=
cit
mentions of spin lock / CPU soft lockup / stall on CPU. I've also noticed a
potentially important message, which although marked as a warning seems to
point to a line of source code from the radeon driver:

[58857.640890] WARNING: CPU: 3 PID: 2549 at
../drivers/gpu/drm/radeon/radeon_object.c:84 radeon_ttm_bo_destroy+0xec/0xf0
[radeon]

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