Public bug reported:
Brief summary:
The linux-ec2 kernel erroneously adds in the freed initrd memory to the total
memory allocated to the vm which makes the output of 'free' misleading. For
example, if you create a domU with 256MB of RAM and the initrd is 9MB in size,
your instance will show
Done with the git bisect. It's somewhere in the late days of 3.17 and
early days of 3.18. Here's the RHBZ with the patch:
https://bugzilla.redhat.com/show_bug.cgi?id=1188439#c25
I'm hoping someone with more knowledge than me around this part of the
kernel can make sense of it. If I pull the
I'll be firing up a kernel bisect this weekend to see if I can find the
issue. From multiple reports (incuding some in the RHBZ[1]), 3.16 works
and 3.17 has issues. 3.18 and 3.19-rc7 have no improvements.
[1] https://bugzilla.redhat.com/show_bug.cgi?id=1188439
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Mario --
So 3.18 didn't have any touchpad freeze or tapping issues? I've tested
3.18.3 and 3.18.5 on Fedora and they have the freezes. I'm wondering if
something broke between 3.18.0 and 3.18.3. Do you have any additional
details on that 3.18 kernel you tested? Perhaps the git hash?
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You
I tested David's rt288.patch above on 3.19-rc7 and it had no effect on
the audio problem. I tried it with and without reverting the i2c IRQ
patch that fixed the touchpad.
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FWIW, this issue happens for me on the same hardware on Fedora. Already
tried kernels 3.17.4, 3.18.3, and 3.18.5. Blacklisting i2c_hid doesn't
have an effect on the touchpad freeze-ups that Jared noted.
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I'm building with those new SoC patches now. My first couple of builds
didn't work out and I discovered that my .config didn't have modules
enabled for some of those SoC audio codecs. I'll hopefully know
something more soon.
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@Andon-2 -- I wish I had better news. :/
Long story short, I was able to build a 3.19-ish kernel with some
additional ASoC patches earlier this week and the card showed up on the
I2S bus with full input/output capabilities. However, whenever I played
sounds, I never heard anything. PulseAudio
My testing was done on Xen virtual machines, KVM virtual machines, and
bare metal.
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https://bugs.launchpad.net/bugs/1638695
Title:
Python 2.7.12 performance regression
To manage
Public bug reported:
This is apparently fixed in systemd 231:
https://lists.freedesktop.org/archives/systemd-
devel/2016-August/037385.html
When systemd tries to put a VLAN interface into a bridge on Xenial, it
fails:
# journalctl --boot -u systemd-networkd
Jan 15 09:16:46 hydrogen
Thanks for confirming that, Matthias. Testing with GCC 4.8 seemed to
yield (mostly) better results. I put the data into a Google Sheet:
https://goo.gl/9gW82j
Out of the 10 pyperformance tests:
* 3 tests were actually faster with python compiled w/gcc-4.8
* 4 tests were slightly slower
Public bug reported:
I work on the OpenStack-Ansible project and we've noticed that testing
jobs on 16.04 take quite a bit longer to complete than on 14.04. They
complete within an hour on 14.04 but they normally take 90 minutes or
more on 16.04. We use the same version of Ansible with both
Hello Matthias,
I'm sorry for the confusion there. What I meant is that I compiled
2.7.12 on 14.04 and found that it had the same performance as 2.7.6
(from the default Ubuntu python package) on 14.04. I also loaded
Xenial's kernel on the 14.04 installation and found no performance
difference
I can try that. Just to be clear, you're suggesting to do the
following:
1) Install gcc-4.8 on 16.04
2) Compile 2.7.12 with gcc-4.8 on 16.04
3) Re-run tests
Did I get that right?
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Thanks for the deep dive, Elvis! :) Is it possible to adjust some of
these settings in the Ubuntu packages, or is just the way it will be
going forward?
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There's a discussion here possibly about the same problem:
https://patchwork.ozlabs.org/patch/801533/
And they referred to this patch:
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-
stable.git/commit/?id=242d3a49a2a1a71d8eb9f953db1bcaa9d698ce00
The changes look like they
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