@Dann, my bad. the installer kernel is from older 16.04 release, that
was before this commit. I don't see this issue with latest installer
kernel.
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@Radha If you are still seeing this bug, can you attach a console log?
Here's the commit that was added in xenial to address this:
commit 51b7d7350e526bde77f458fb23481e7c5d312d91
Author: David Daney
Date: Tue May 24 12:55:54 2016 +0800
UBUNTU: SAUCE: tty: vt: Fix soft lockup in fbcon curs
What is the exact commit that went into to fix this?
I am looking at drivers/video/console/fbcon.c at
"https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/xenial/";
and I don't see the fix here.
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Bugs, which
This bug was fixed in the package linux - 4.4.0-28.47
---
linux (4.4.0-28.47) xenial; urgency=low
[ Luis Henriques ]
* Release Tracking Bug
- LP: #1595874
* Linux netfilter local privilege escalation issues (LP: #1595350)
- netfilter: x_tables: don't move to non-existe
This bug was fixed in the package linux - 4.4.0-25.44
---
linux (4.4.0-25.44) xenial; urgency=low
[ Kamal Mostafa ]
* Release Tracking Bug
- LP: #1591289
* Xenial update to v4.4.13 stable release (LP: #1590455)
- MIPS64: R6: R2 emulation bugfix
- MIPS: math-emu: Fi
I rebuilt d-i against the kernel in proposed and booted it a couple of
times. I have not reproduced this issue, so marking it verified.
~ # uname -a
Linux cvm3 4.4.0-25-generic #44-Ubuntu SMP Fri Jun 10 18:15:04 UTC 2016 aarch64
GNU/Linux
~ # dmesg | grep -i soft
[ 0.00] Kernel command line:
This bug is awaiting verification that the kernel in -proposed solves
the problem. Please test the kernel and update this bug with the
results. If the problem is solved, change the tag 'verification-needed-
xenial' to 'verification-done-xenial'.
If verification is not done by 5 working days from t
** Also affects: linux (Ubuntu Xenial)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu Xenial)
Status: New => Fix Committed
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Upstream thread: https://lists.freedesktop.org/archives/dri-
devel/2016-May/107693.html
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Title:
ThunderX: soft lockup in cursor_timer_handler()
On Tue, May 17, 2016 at 12:12 PM, Ming Lei wrote:
> On Mon, May 16, 2016 at 5:25 PM, Ming Lei wrote:
>> On Fri, May 13, 2016 at 7:22 AM, dann frazier
>> wrote:
>>> I used ftrace to do some duration measuring of the timer function
>>> fb_flashcursor(). I noticed several places where this timer ta
On Mon, May 16, 2016 at 5:25 PM, Ming Lei wrote:
> On Fri, May 13, 2016 at 7:22 AM, dann frazier
> wrote:
>> I used ftrace to do some duration measuring of the timer function
>> fb_flashcursor(). I noticed several places where this timer takes around
>> 98 ms to complete. This time seems to be du
** Summary changed:
- ThunderX: soft lockup in cursor_timer_handler() Edit
+ ThunderX: soft lockup in cursor_timer_handler()
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Title:
ThunderX: s
On Fri, May 13, 2016 at 7:22 AM, dann frazier
wrote:
> I used ftrace to do some duration measuring of the timer function
> fb_flashcursor(). I noticed several places where this timer takes around
> 98 ms to complete. This time seems to be due to multiple calls to
> __memcpy_toio() in ast_dirty_upd
I used ftrace to do some duration measuring of the timer function
fb_flashcursor(). I noticed several places where this timer takes around
98 ms to complete. This time seems to be due to multiple calls to
__memcpy_toio() in ast_dirty_update():
for (i = y; i <= y2; i++) {
/*
I captured a perf data file, starting just before the NMI kicked in - in
this case, it again occurred on CPU 11. I found that CPU 11 had spent a
lot of its time in cursor_timer_handler():
- 16.92% swapper [kernel.kallsyms] [k] _raw_spin_unlock_irqrestore
▒
- _raw_spin_unl
I created a perf timechart (attached) to see if that would illuminate
the problem. This is taken from the installer environment for the first
30s.
In this boot, the soft lockup occurred on CPU 11:
[ 32.815351] NMI watchdog: BUG: soft lockup - CPU#11 stuck for 22s!
[swapper/11:0]
This blocked
** Changed in: linux (Ubuntu)
Importance: Undecided => Medium
** Tags added: kernel-da-key
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Title:
ThunderX: soft lockup in cursor_timer_hand
I think AMI UEFI has the aspeed vga driver but Cavium UEFI doesn't. so
this might be causing issues ?
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Title:
ThunderX: soft lockup in cursor_tim
fyi, I've found that removing the ast kernel module from the di initrd
seems to avoid the issue.
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Title:
ThunderX: soft lockup in cursor_timer_ha
I tried PXE based install (just booting till the installer does network
init) multiple times with Cavium UEFI and did not see this issue, but as
soon as I tried AMI UEFI first time the "NMI softlockup ..." appeared
after sometime while still in opening screen of "debian-installer".
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On Tue, May 3, 2016 at 1:14 PM, Radha Mohan Chintakuntla
wrote:
> Ming,
> The "-I" option of tcpdump is monitoring mode typically applicable only to
> wifi interfaces. So even if you run it on Thunder's NIC interfaces it will
> return saying that this is not supported.
>
Even without the '-I',
Ming,
The "-I" option of tcpdump is monitoring mode typically applicable only to wifi
interfaces. So even if you run it on Thunder's NIC interfaces it will return
saying that this is not supported.
And BTW, what is eth7 ?
>From 16.04 release all interfaces are coming up as "enP2x"
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On Tue, May 3, 2016 at 10:35 AM, dann frazier
wrote:
> On Fri, Apr 29, 2016 at 2:06 AM, Ming Lei <1574...@bugs.launchpad.net> wrote:
>> It can be triggered 100% by running 'tcpdump -I ethX'.
>
> Thanks Ming. I let that run for a few hours, but was unable to
> reproduce. Are you seeing the same tra
On Fri, Apr 29, 2016 at 2:06 AM, Ming Lei <1574...@bugs.launchpad.net> wrote:
> It can be triggered 100% by running 'tcpdump -I ethX'.
Thanks Ming. I let that run for a few hours, but was unable to
reproduce. Are you seeing the same traceback along w the softlockup
msg?
-dann
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It can be triggered 100% by running 'tcpdump -I ethX'.
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Title:
ThunderX: soft lockup in cursor_timer_handler() Edit
To manage notifications abou
I have been able to reproduce a soft lockup using a pure upstream kernel
(post-4.5 git, after the thunderx pcie drivers were merged) and the d-i
initrd mentioned above. I've attached a log of one of those boots.
I used the Ubuntu config with the following exceptions:
CONFIG_DRM=y and CONFIG_DRM_A
Note that, while I haven't been able to reproduce this by booting into
Ubuntu from disk, I can easily reproduce it by booting d-i from disk -
specifically, the linux and initrd.gz here:
http://ports.ubuntu.com/ubuntu-ports/dists/xenial/main/installer-
arm64/20101020ubuntu451/images/netboot/ubuntu-
The traceback isn't always the same - here it was stuck in mod_timer():
[ 180.912269] NMI watchdog: BUG: soft lockup - CPU#9 stuck for 22s!
[swapper/9:0]
[ 180.912293] Modules linked in: hid_generic(E) usbhid(E) hid(E)
usb_storage(E) mdio_thunder(E) nicvf(E) ast(E) i2c_algo_bit(E)
drm_kms_hel
** Attachment added: "screenshot of vga console"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1574814/+attachment/4646973/+files/Screenshot%20from%202016-04-25%2013-03-44.png
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