* [Bug 106456] [regression][bisected] Mutex deadlock in nouveau (nv50_display.c)
@ 2018-05-09 20:24 bugzilla-daemon
2018-05-09 20:26 ` bugzilla-daemon
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0 siblings, 4 replies; 5+ messages in thread
From: bugzilla-daemon @ 2018-05-09 20:24 UTC (permalink / raw)
To: dri-devel
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https://bugs.freedesktop.org/show_bug.cgi?id=106456
Bug ID: 106456
Summary: [regression][bisected] Mutex deadlock in nouveau
(nv50_display.c)
Product: DRI
Version: DRI git
Hardware: x86-64 (AMD64)
OS: Linux (All)
Status: NEW
Severity: major
Priority: medium
Component: DRM/other
Assignee: dri-devel@lists.freedesktop.org
Reporter: john@jlindgren.net
Since linux 4.14, the nouveau driver deadlocks at boot.
Downstream report:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1763189?comments=all
The culprit is this commit:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=af2405af07d168e2905f2ac9494d3a804a549f0f
In short, drm_fb_helper_add_one_connector() and
drm_fb_helper_remove_one_connector() were incompatibly changed to add locking
of a mutex that previously the caller was expected to lock. The i915 and
radeon drivers were updated to no longer lock the mutex, but nouveau was not
updated.
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* [Bug 106456] [regression][bisected] Mutex deadlock in nouveau (nv50_display.c)
2018-05-09 20:24 [Bug 106456] [regression][bisected] Mutex deadlock in nouveau (nv50_display.c) bugzilla-daemon
@ 2018-05-09 20:26 ` bugzilla-daemon
2018-05-09 22:12 ` bugzilla-daemon
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3 siblings, 0 replies; 5+ messages in thread
From: bugzilla-daemon @ 2018-05-09 20:26 UTC (permalink / raw)
To: dri-devel
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https://bugs.freedesktop.org/show_bug.cgi?id=106456
--- Comment #1 from John Lindgren <john@jlindgren.net> ---
Created attachment 139452
--> https://bugs.freedesktop.org/attachment.cgi?id=139452&action=edit
Fix mutex deadlock in nouveau driver
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* [Bug 106456] [regression][bisected] Mutex deadlock in nouveau (nv50_display.c)
2018-05-09 20:24 [Bug 106456] [regression][bisected] Mutex deadlock in nouveau (nv50_display.c) bugzilla-daemon
2018-05-09 20:26 ` bugzilla-daemon
@ 2018-05-09 22:12 ` bugzilla-daemon
2018-05-09 23:05 ` bugzilla-daemon
2018-05-12 13:29 ` bugzilla-daemon
3 siblings, 0 replies; 5+ messages in thread
From: bugzilla-daemon @ 2018-05-09 22:12 UTC (permalink / raw)
To: dri-devel
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https://bugs.freedesktop.org/show_bug.cgi?id=106456
--- Comment #2 from Ilia Mirkin <imirkin@alum.mit.edu> ---
Fixed by this?
https://github.com/skeggsb/nouveau/commit/f84973838226b8a599bce64376665ec8f0087629
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* [Bug 106456] [regression][bisected] Mutex deadlock in nouveau (nv50_display.c)
2018-05-09 20:24 [Bug 106456] [regression][bisected] Mutex deadlock in nouveau (nv50_display.c) bugzilla-daemon
2018-05-09 20:26 ` bugzilla-daemon
2018-05-09 22:12 ` bugzilla-daemon
@ 2018-05-09 23:05 ` bugzilla-daemon
2018-05-12 13:29 ` bugzilla-daemon
3 siblings, 0 replies; 5+ messages in thread
From: bugzilla-daemon @ 2018-05-09 23:05 UTC (permalink / raw)
To: dri-devel
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https://bugs.freedesktop.org/show_bug.cgi?id=106456
--- Comment #3 from John Lindgren <john@jlindgren.net> ---
Yes, that looks like the same fix.
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* [Bug 106456] [regression][bisected] Mutex deadlock in nouveau (nv50_display.c)
2018-05-09 20:24 [Bug 106456] [regression][bisected] Mutex deadlock in nouveau (nv50_display.c) bugzilla-daemon
` (2 preceding siblings ...)
2018-05-09 23:05 ` bugzilla-daemon
@ 2018-05-12 13:29 ` bugzilla-daemon
3 siblings, 0 replies; 5+ messages in thread
From: bugzilla-daemon @ 2018-05-12 13:29 UTC (permalink / raw)
To: dri-devel
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https://bugs.freedesktop.org/show_bug.cgi?id=106456
Ilia Mirkin <imirkin@alum.mit.edu> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #4 from Ilia Mirkin <imirkin@alum.mit.edu> ---
This is now in mainline:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=352672db857290ab5b0e2b6a99c414f92bee024c
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2018-05-09 20:24 [Bug 106456] [regression][bisected] Mutex deadlock in nouveau (nv50_display.c) bugzilla-daemon
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