I cannot yet explain this, but after bisecting the config, I can repro
this with pseries_le_defconfig + CONFIG_RCU_SCALE_TEST=m
That's weird to me, and I'll continue to investigate.
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http
Hi,
We do ship an iso for ppc64le for Trusty - I'm not sure whether it does
bare metal/PowerNV or just as an LPAR under PowerVM, but it's probably a
bit moot at this point.
The good news is that as you can see, the artful kernel was released with the
fix.
The Xenial kernel also contains the fix;
Hi Florian,
With that pointer I was able to grab the correct patches from the
release/2.23/master branch and apply them to the Ubuntu Xenial glibc
package. The built package performs correctly and quickly.
Thanks so much - it would have taken me much, much longer to figure out
what was going on w
Public bug reported:
SRU Justification
=
[Impact]
An IBM OpenPower partner reports their system with a bunch of NVMe
drives fails the NVMe init due to some drives taking PCIe EEH errors.
[Fix]
Pick patch db2173198b9513f7add8009f225afa1f1c79bcc6 upstream.
[Testing]
IBM reports
I've checked that the proposed Xenial AWS kernel works - it boots
successfully and uses the deadline scheduler by default on a t2.micro
instance.
Regards,
Daniel
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Hi,
I added this to my netplan-config-tester and it's turned up a couple of
issues with NetworkManager.
1) If a static IPv4 address is specified and link-local: [ipv4] is
specified, there is no link-local address added. The documentation
doesn't make this clear; it only refers to DHCP conflicting
Public bug reported:
SRU Justification
-
[Impact]
A kernel BUG is sometimes observed when using fscache:
[4740718.880898] FS-Cache:
[4740718.880920] FS-Cache: Assertion failed
[4740718.880934] FS-Cache: 0 > 0 is false
[4740718.881001] [ cut here ]-
Hi Steve,
No worries, that sounds fair enough. I will file the bugs as separate
issues in the next few days then.
Regards,
Daniel
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Title:
suppo
** Description changed:
SRU Justification
-
[Impact]
A kernel BUG is sometimes observed when using fscache:
[4740718.880898] FS-Cache:
[4740718.880920] FS-Cache: Assertion failed
[4740718.880934] FS-Cache: 0 > 0 is false
[4740718.881001] --
** Description changed:
+ SRU Justification
+ =
+
+ [Impact]
+
+ * Severe performance hit on many maths-heavy workloads. For example, a
+ user reports linpack performance of 13 Gflops on Trusty and Bionic and
+ 3.9 Gflops on Xenial.
+
+ * Because the impact is so large (>3x) a
aries
dpkg-shlibdeps: warning: symbol _ZN5boost9re_detail13get_mem_blockEv used by
debian/google-compute-engine-oslogin/lib/libnss_google-compute-engine-oslogin-1.3.1.so
found in none of the libraries
** Affects: linux (Ubuntu)
Importance: Critical
Assignee: Daniel Axtens (daxtens)
aries
dpkg-shlibdeps: warning: symbol _ZN5boost9re_detail13get_mem_blockEv used by
debian/google-compute-engine-oslogin/lib/libnss_google-compute-engine-oslogin-1.3.1.so
found in none of the libraries
** Affects: linux (Ubuntu)
Importance: Critical
Assignee: Daniel Axtens (daxtens)
** Tags added: sts
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Title:
Incomplete linking with boost_regex
To manage notifications about this bug go to:
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** Tags added: sts
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Title:
Serious performance degradation of math functions
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Hi,
For Xenial:
daniel_axtens_canonical_com@dja-202158:~$ sudo apt install
google-compute-engine-oslogin=20180905+dfsg1-0ubuntu1~16.04.1
...
Get:1 http://au.archive.ubuntu.com/ubuntu xenial-proposed/universe amd64
google-compute-engine-oslogin amd64 20180905+dfsg1-0ubuntu1~16.04.1 [76.7 kB]
..
Hi,
I haven't found the time to do this yet, sorry. Is it still an issue on
the current Xenial kernel?
Regards,
Daniel
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Title:
linux-generic-hw
** Changed in: glibc (Ubuntu Xenial)
Status: New => Confirmed
** Changed in: glibc (Ubuntu Xenial)
Assignee: (unassigned) => Daniel Axtens (daxtens)
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Hi,
This works on reboot but not so well after the system boots.
Say I have the following file:
network:
version: 2
ethernets:
ens7:
dhcp4: true
match:
macaddress: 52:54:00:b4:02:6e
set-name: myif1
optional: true
If
Public bug reported:
In current Ubuntu kernels, PV blkfront drivers have blk-mq enabled by
default and cannot use the old I/O scheduler.
[Impact]
blk-mq is not as fast as the old request-based scheduler for some workloads on
HDD disks.
[Fix]
Amazon Linux has a commit which reintroduces the requ
** Description changed:
In current Ubuntu kernels, PV blkfront drivers have blk-mq enabled by
default and cannot use the old I/O scheduler.
[Impact]
blk-mq is not as fast as the old request-based scheduler for some workloads
on HDD disks.
[Fix]
Amazon Linux has a commit which re
Public bug reported:
A user reports that using an i40e with intel_iommu=on with the Xenial GA
kernel causes data corruption. Using the Xenial HWE kernel or an out-of-
tree driver more recent than the version shipped with Xenial solves the
issue.
[Impact]
Corrupted data is returned from the networ
** Description changed:
A user reports that using an i40e with intel_iommu=on with the Xenial GA
kernel causes data corruption. Using the Xenial HWE kernel or an out-of-
tree driver more recent than the version shipped with Xenial solves the
issue.
[Impact]
Corrupted data is returne
) finally check using cat /proc/fs/fscache/stats | grep -i pages ;
free -h , cat /proc/meminfo and page-types -r -b lru
to ensure all pages are freed.
[Regression Potential]
Limited to cachefiles.
** Affects: linux (Ubuntu)
Importance: Undecided
Assignee: Daniel Axtens (da
This has been fixed in Cosmic. I have attempted to nominate it for
Xenial and Bionic for backporting.
** Also affects: netplan.io (Ubuntu)
Importance: Undecided
Status: New
** Changed in: netplan.io (Ubuntu)
Status: New => Fix Committed
** Changed in: netplan
Status: Fix
Hi Matt,
I don't think this is documentation-only: it was rendered incorrectly
out to networkd - see my comment #4.
Regards,
Daniel
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Title:
'gr
Hi Michael R,
I tried to apply your patches to test them and support the effort to get
them included in the Bionic kernel, but I'm having some trouble applying
them:
ubuntu@dja-bionic:~/bionic$ git am
../patches/01-powerpc-64s-add-support-for-ori-barrier_nospec.patch
Patch format detection faile
Hi Mauricio,
Thanks for the prompt answer! After a lot of messing around to get a
remote console, I can finally test. It looks like -88 doesn't work. I'm
attaching a dmesg from -88 and -72. I will build and test master-next
next.
Regards,
Daniel
** Attachment added: "dmesg from -88"
https://
** Attachment added: "dmesg from -72"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1863044/+attachment/5329133/+files/dmesg-72
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Title:
Ah, I was just about to tell you that I have just tried master-next at
a59858e18bc8996f8c96d307a33e504b079dc541 ! I think that is the same sha
that ended up being tagged as -89, so I think it provides us with the
same information.
Sadly -89 also doesn't seem to work; dmesg attached.
I don't know
Hi Mauricio,
5.4.0-14 works for me, dmesg attached.
I'll see if an HWE kernel supplied in the bionic repositories also
works, maybe we can use that in the mean time so we don't fall any
further behind on kernel updates while we debug this.
Regards,
Daniel
** Attachment added: "dmesg-5.4.0-14-ge
The 5.3.0 HWE kernel also works, which means we now have a good
workaround while we debug things.
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Title:
qla2xxx no longer detects LUNs with 4.1
** Changed in: linux (Ubuntu)
Assignee: (unassigned) => Daniel Axtens (daxtens)
** Changed in: linux (Ubuntu)
Importance: Undecided => Medium
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** Description changed:
SRU Justification
[Impact]
On the HiSilicon D05 (arm64) board, X crashes when started. [0]
[Fix]
The crash is attributable to the bus ID that the hibmc driver reports for the
hibmc graphics card on the board. In particular, the bus id is missing the
"pci:"
** Description changed:
- The HiSilicon D05 board has some PCI bridges (PCI ID 19e5:1610) that are
- not spec-compliant: they do not set the VGA Enable bit when a VGA card
- is behind the bridge. This breaks Xorg auto-detection. [0]
+ SRU Justification
+
+ [Impact]
+ Xorg autodetection does not w
** Description changed:
SRU Justification
[Impact]
Xorg autodetection does not work on HiSilicon D05 boards.
[Fix]
The HiSilicon D05 board has some PCI bridges (PCI ID 19e5:1610) that are not
spec-compliant: they do not set the VGA Enable bit when a VGA card is behind
the bridge.
Verified in my qemu tcg guest.
** Tags added: verification-done-zesty
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Title:
XDP eBPF programs fail to verify on Zesty ppc64el
To manage notif
Verified the proposed kernel on the D05.
** Tags added: verification-done-zesty
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Title:
hibmc driver does not include "pci:" prefix in bus ID
T
Hi Fred,
I will have a look soon and update you.
Regards,
Daniel
On Mon, Dec 11, 2017 at 6:00 PM, Fred Kimmy
wrote:
> this patch will solve commit #10 bug, please merge this patch.
>
> thank you
>
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> report.
> https
cts Artful, upstream has not landed on a solution yet as far as
I can tell, so lets backport the first proposed small fix.
** Affects: linux (Ubuntu)
Importance: Undecided
Assignee: Daniel Axtens (daxtens)
Status: New
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There is another bug causing an artful regression - opening a new LP for
that: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1738334
** Changed in: linux (Ubuntu Artful)
Status: Incomplete => Fix Released
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Hi Fred,
The artful repository is git://kernel.ubuntu.com/ubuntu/ubuntu-
artful.git
It contains 4417ec7a7c8d ("UBUNTU: SAUCE: PCI: Support hibmc VGA cards
behind a misbehaving HiSilicon bridge")
This was an earlier version of those patches and should allow xorg
autoconfiguration to work.
Regard
Confirmed - the symptom is a kernel splat about "Attempting to execute
userspace memory" triggered by Xorg with LR in ttm_bo_vm_fault - see
attached screenshot (sorry!)
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
** Attachment added: "splat.png"
https://bugs.launchpa
** Description changed:
- ea642c3216cb ("drm/ttm: add io_mem_pfn callback") is incomplete: the
- hisilicon hibmc driver does not contain the callback and so X does not
- start.
+ [SRU Justification]
- Discussion and potential fix at https://lists.freedesktop.org/archives
- /dri-devel/2017-Novem
Hi all,
I think there are two issues at play here, one is the bad pmd one, and
one is the original "huge_memory: mapcount 0 page_mapcount 1".
Perhaps we could break the bad pmd issue out into a different LP bug?
People with the original bug - was anyone able to verify if this
happened on a more
Ryan, I can't get that to work on my systems. What is it that update-
initramfs is supposed to change? I don't see any files in my initramfs
that are generated or read by netplan. Neither do I see netplan itself
in the initramfs!
Mathieu, I thought netplan was supposed to be initramfs friendly by
Ok, so the bit I'm stuck on is how the link files and the netplan
generator are getting pulled into the initramfs then.
ubuntu@btest:~$ sudo update-initramfs -u
update-initramfs: Generating /boot/initrd.img-4.15.0-20-generic
ubuntu@btest:~$ lsinitramfs /boot/initrd.img-4.15.0-20-generic | grep \\
Right. Yes, I can replicate that, thanks heaps!
So to summarise, you can make the rename take effect on boot if you:
1) copy the files from /run/systemd/network -> /etc/systemd/network
2) then update-initramfs -u
This seems pretty far outside of the way that netplan is supposed to work -
indeed
Ok, how does this look?
** Patch added: "link-files-in-run.debdiff"
https://bugs.launchpad.net/netplan/+bug/1770082/+attachment/5139062/+files/link-files-in-run.debdiff
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This is not a full solution. In Xenial this renaming works even if
initramfs has *not* been updated and there is no 70-persistent-net.rules
file in the initial ramdisk. I'm still figuring out why this is, but it
means that even if my patch were applied, there would be a regression in
bionic vs xeni
Hi Ryan,
[Journal Output]
Attached.
[Reproducer]
uvt-kvm create xenial-test release=xenial arch=amd64
virsh edit xenial-test # change network interface pci slot: s/0x03/0x10/
virsh destroy xenial-test
virsh start xenial-test
uvt-kvm ssh xenial-test
dmesg|grep rename
[2.790623] virtio_net virt
> Note, that uvt-kvm is going to use cloud-init; how are you making
> sure that cloud-init isn't doing the rename itself?
I instrumented the kernel. I added a call to dump_stack() in the
function that does interface renaming: dev_change_name() in
net/core/dev.c. That showed that the process that s
Opened https://github.com/systemd/systemd/issues/9006
** Bug watch added: github.com/systemd/systemd/issues #9006
https://github.com/systemd/systemd/issues/9006
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I have tested this with the kernel bpf self-test, and it passes.
** Tags removed: verification-needed-xenial
** Tags added: verification-done-xenial
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Hi,
I am the support engineer on the Canonical side who has been working on
this with IBM Support on your behalf. Apologies for the confusion. I
will contact our kernel team now and get this clarified for you as soon
as I can.
Now, I can't speak for the kernel team or make any commitments on thei
Hi,
As well as Po-Hsu's comment above, I also have this internal update from
the kernel team:
As this is also a security fix, don't stress too much. If things
could be verified for at least for one of the kernels until next week
that is better than nothing. We are rather unlikely rip out fixe
Hi,
Thanks for the Xenial test!
The kernel team process is that patches will always be committed from
the most recent kernel first and then back to older kernels, so that no-
one ends up with a regression if they upgrade to a more recent kernel.
So if it is applied to Xenial it will be applied to
Fantastic!
If I understand correctly, that is sufficient for verification-done-
artful, so I am changing that over for you.
The one remaining kernel is Trusty 3.13. I am guessing your module
doesn't compile for that? If it doesn't, there probably isn't much point
on booting with just a virtual et
Public bug reported:
[Availability]
python-distro and python3-distro are available in universe and are
architecture independent.
[Rationale]
python3-distro is an upcoming build dependency of Azure's
WALinuxAgent, which we support in main.
This change is being made in advance of Python 3.7, whi
Public bug reported:
If I do netplan try, press ^C during the wait, and try to type, my
characters are not echoed to the terminal.
(This is similar to what powersj found in https://asciinema.org/a/176782
but different in that instead of Enter it's ^C that triggers it.)
I think you'll need to tra
Public bug reported:
I have an ethernet device, with an MTU of 1500:
ubuntu@netplan:~$ ip l
...
3: ens8: mtu 1500 qdisc noop state DOWN group default
qlen 1000
link/ether 52:54:00:f9:e9:dd brd ff:ff:ff:ff:ff:ff
I try the following config, 1-mtu.yaml:
network:
version: 2
ethernets:
Oh, this is with 0.36.1:
ubuntu@netplan:~$ apt list netplan.io
Listing... Done
netplan.io/bionic,now 0.36.1 amd64 [installed,automatic]
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Title:
Public bug reported:
Attempting to start a KVM guest with more than 1TB of RAM fails.
It looks like we might need some extra patches:
https://lists.gnu.org/archive/html/qemu-discuss/2017-12/msg5.html
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: qemu-system-x86 1:2.11+dfsg-1ubuntu7
P
(I'm not trying to start this on my laptop, so ignore the uploaded
files. They're just what apport-bug decided to include.)
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Title:
Cannot start
** Also affects: qemu
Importance: Undecided
Status: New
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Title:
Cannot start a guest with more than 1TB of RAM
To manage notifications
Hi Christian,
Sorry, I should have been a *lot* more clear.
I wanted to file the bug so that we have somewhere to figure out what needs
to be done and track the progress - trying to avoid it becoming something
we vaguely know about but don't ever do anything about.
Thanks so much for your analys
It should work if you match by MAC address. It's a messy interaction with
udev, as I understand it. Could you try matching by MAC and seeing if that
works?
We should definitely document it better.
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Glad that helped. I'm confused as to why cloud-init doesn't add the mac
addresses - it does in my VMs. Let's ask them; I'll add them to the bug.
** Description changed:
+ == cloud-init query ==
+
+ Cloud-init isn't adding MAC addresses in the match stanza for various
+ network interfaces in /et
ock
** Changed in: linux (Ubuntu)
Assignee: Dragan S. (dragan-s) => Daniel Axtens (daxtens)
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Title:
user space process hung in 'D' st
** Description changed:
+ === systemd issue ===
+
+ Renaming devices doesn't seem to work.
+
+ If I create /etc/systemd/network/10-network.link with:
+
+ [Match]
+ MACAddress=52:54:00:c1:c9:bb
+
+ [Link]
+ Name=myiface3
+
+ I expect this to cause the device with that MAC address to be named t
** Summary changed:
- set-name doesn't work on boot, only with netplan apply
+ systemd-networkd not renaming devices on boot
** Description changed:
=== systemd issue ===
Renaming devices doesn't seem to work.
If I disable all other network configuration and create
/etc/systemd/net
Both the original cloudy report and my test use a VM. The issue seems to
happen for both virtio and emulated e1000 network hardware.
What happens differently with a VM?
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Ryan: I removed /etc/netplan/50-cloud-init.yaml and rebooted repeatedly and
I've never seen it regenerated.
I also don't see anything in /run/netplan or /run/systemd/network that has
been autogenerated.
I haven't touched anything else generated by cloud-init. When would
cloud-init regenerate a ne
Hi Andy,
This is a known issue - after giving backends a chance to bring up network
interfaces, netplan apply will iterate over interfaces that are still down,
unbind them from their driver and rebind them. This can cause renaming of
the interface.
In general, adding "set-name: ens7" to your YAML
The embargo has expired so I'm making this public now.
** Description changed:
Hi,
Recently you would have been notified about CVE-2019-18660 via email to
the linux-distros private mailing list. In short, it is a bug in the
Spectre v2 class affecting powerpc.
We have developed so
rstood and backports with minimal effort.
** Affects: cachefilesd (Ubuntu)
Importance: Undecided
Assignee: Daniel Axtens (daxtens)
Status: Confirmed
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It turns out the package uses the cdbs system rather than quilt, so
providing a debdiff is a bit tricky. Here's the patch that I applied,
the result is at
https://launchpad.net/~daxtens/+archive/ubuntu/builder/+build/16226405
and it works on my test system, and I am asking the original reporter to
The full .diff.tar.gz is attached.
** Attachment added: "cachefilesd_0.10.5-1ubuntu1.diff.gz"
https://bugs.launchpad.net/ubuntu/+source/cachefilesd/+bug/1810372/+attachment/5227284/+files/cachefilesd_0.10.5-1ubuntu1.diff.gz
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Hi,
I tested this on a real ppc64le machine:
root@1325f5985861:/# python3 -c "import math; print(math.exp(-1))"
0.36787944117144233
root@1325f5985861:/# uname -a
Linux 1325f5985861 5.4.0-21-generic #25+lp1866909v202004031128-Ubuntu SMP Fri
Apr 3 18:38:30 UTC 202 ppc64le ppc64le ppc64le GNU/Linu
Oof, sorry! It's not clear to me from the bug report and subsequent
comments - is it just Bionic that's affected, or is it also Cosmic?
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Title:
s
Never mind, I can reproduce on Cosmic.
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Title:
systemd-networkd core dumps in bionic-proposed
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OK, so with the magic of debug symbols and gdb on Cosmic:
(gdb) run
...
ens8: Gained IPv6LL
Assertion 'link->state == LINK_STATE_SETTING_ADDRESSES' failed at
../src/network/networkd-link.c:803, function link_enter_set_routes(). Aborting.
...
(gdb) up
#3 0x5566b194 in link_enter_set_route
Hi Seth,
I've pushed them to https://github.com/libarchive/libarchive/pull/1105
Thanks for walking me through the Ubuntu process.
Regards,
Daniel
** Information type changed from Private Security to Public Security
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(as with the other test cases, it's in plain text, convert it back with
xxd -r aclcrasher.txt aclcrasher)
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Title:
Memory corruption in RAR decode
Here's a test case for the NULL pointer dereference in ACL handling.
** Attachment added: "aclcrasher.txt"
https://bugs.launchpad.net/ubuntu/+source/libarchive/+bug/1794909/+attachment/5221005/+files/aclcrasher.txt
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This is the warc infinite loop test case. Unlike the other files, it's
*not* encoded, and I use ./bsdtar -Oxf warcloop.warc to see the looping
behaviour.
** Attachment added: "warcloop.warc"
https://bugs.launchpad.net/ubuntu/+source/libarchive/+bug/1794909/+attachment/5221006/+files/warcloop.w
I think I have discovered the cause: https://lore.kernel.org/linux-
block/87h8e9ii2l@linkitivity.dja.id.au/
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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** Tags removed: verification-needed-xenial
** Tags added: verification-done-xenial
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Title:
Infinite busy-loop trying to cull when cache space is
User has verified the Xenial version. I have verified the Trusty
version.
Regards,
Daniel
** Tags removed: verification-needed-trusty
** Tags added: verification-done-trusty
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Hi,
Thanks Eric.
I specifically tested the version from Trusty: 0.10.5-1ubuntu0.14.04.1.
I tested it by enabling cachefilesd and using dd to get the disk to
about 95% full.
With 0.10.5-1, starting cachefilesd with a full disk caused the process
to spin at 100% cpu usage. With the version from p
Hi,
I have a patch which I believe fixes your issue:
https://www.spinics.net/lists/linux-bcache/msg06997.html
It looks like it will go in to the 5.1 kernel, and I will propose it for
backporting to earlier Ubuntu kernels.
Regards,
Daniel
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Public bug reported:
Hi,
I just upgraded to cosmic and have hit the issue described in debian bug
#9065955 - https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=906955 -
mbsync won't connect to e.g. gmail because of SSL errors.
I downloaded 1.3.0-2 from Debian and it works. Would it be possible to
The OpenPower partner reports that their system is fixed with this
kernel.
** Tags removed: verification-needed-bionic
** Tags added: verification-done-bionic
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ues - it moves from a surprising behaviour to a less
surprising behaviour, but it's worth pointing out.
** Affects: systemd (Ubuntu)
Importance: Undecided
Assignee: Daniel Axtens (daxtens)
Status: In Progress
** Changed in: systemd (Ubuntu)
Status: Confirmed => In
** Tags added: sts
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https://bugs.launchpad.net/bugs/1812760
Title:
networkd: [Route] PreferredSource not working in *.network files
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The user has verified that the -proposed kernel resolves their issue.
Regards,
Daniel
** Tags removed: verification-needed-xenial
** Tags added: verification-done-xenial
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** Changed in: nplan (Ubuntu)
Assignee: Daniel Axtens (daxtens) => (unassigned)
** Changed in: nplan (Ubuntu)
Status: In Progress => Confirmed
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** Description changed:
+ SRU Justification
+ =
+
+ [Impact]
+
+ Some users see panics like the following when performing fstrim on a
+ bcached volume:
+
+ [ 529.803060] BUG: unable to handle kernel NULL pointer dereference at
0008
+ [ 530.183928] #PF error: [norm
I've figured out how to work around this. It's all documented at
http://djanotes.blogspot.com/2018/04/anonymous-bridges-in-netplan.html.
In short, I tell systemd-networkd directly to bring up the bridge. To do
this, in addition to the rest of the configuration in netplan, I create
/etc/systemd/net
Public bug reported:
The kdump/crashdump kernel is panicing during boot on Bionic.
1) Install the daily Bionic server or desktop ISO
2) apt install linux-crashdump, say yes to kdump being enabled
3) Reboot so as to boot with the correct kernel parameter
4) Run:
root@bionic-server:~# echo 1 >
** Changed in: linux (Ubuntu)
Assignee: Daniel Axtens (daxtens) => (unassigned)
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https://bugs.launchpad.net/bugs/1783246
Title:
Cephfs + fscache: unable to handle kernel N
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