[Kernel-packages] [Bug 1919154] Re: Enable CONFIG_NO_HZ_FULL on supported architectures

Gerald, Using gettimeofday for testing the effects of NO_HZ_FULL on context switch duration may not be measuring anything that changes with regards to NO_HZ_FULL. gettimeofday is implemented via VDSO, and is not an actual system call that requires a context switch. -- You received this bug

[Kernel-packages] [Bug 2036675] [NEW] 5.15.0-85 live migration regression

Public bug reported: Fixes added for LP 2032164 [0] to resolve an issue in live migration have unfortunately introduced a regression, causing a previously working live migration pattern to fail when tested with the 5.15.0-85 kernel from -proposed. Specifically, live migration from a

[Kernel-packages] [Bug 2004262] Re: Intel E810 NICs driver in causing hangs when booting and bonds configured

https://lore.kernel.org/netdev/20230131213703.1347761-2-anthony.l.ngu...@intel.com/T/#u A possible fix for this problem. The patch was posted on intel-wired- lan a couple weeks ago and just hit netdev today. -- You received this bug notification because you are a member of Kernel Packages,

[Kernel-packages] [Bug 1959702] Re: Regression: ip6 ndp broken, host bridge doesn't add vlan guest entry to mdb

Harry, I'm still working to reproduce this, without success. I have set the .autoconf sysctl to 0 (which controls creation of local addresses in response to received Router Advertisements), as well as setting .addr_gen_mode to 1 (to disable SLAAC (fe80::) addresses). In any

[Kernel-packages] [Bug 1907262] Re: raid10: discard leads to corrupted file system

Thimo, Thanks for the update; just to clarify, for your "procedure to recover," are you saying that that procedure will always resolve the damage, or that even after that procedure, there may be corruption? -- You received this bug notification because you are a member of Kernel Packages, which

[Kernel-packages] [Bug 1894780] Re: Oops and hang when starting LVM snapshots on 5.4.0-47

wgrant, you said: That :a-152 is meant to be /sys/kernel/slab/:a-152. Even a working kernel shows some trouble there: $ uname -a Linux 5.4.0-42-generic #46~18.04.1-Ubuntu SMP Fri Jul 10 07:21:24 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux $ ls -l /sys/kernel/slab | grep a-152

[Kernel-packages] [Bug 1834322] Re: Losing port aggregate with 802.3ad port-channel/bonding aggregation on reboot

** Changed in: linux (Ubuntu) Status: In Progress => Fix Released -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1834322 Title: Losing port aggregate with 802.3ad

[Kernel-packages] [Bug 1873537] [NEW] PCIe AER device recovery failed due to logic flaw

Public bug reported: SRU Justification Impact: During PCI Express Downstream Port Containment (DPC) recovery, certain types of failures do not recover due to a logic flaw in pcie_do_recovery(). The upstream git commit log explains the change: PCI/ERR: Update error status after reset_link()

[Kernel-packages] [Bug 1869423] [NEW] Restore kernel control of PCIe DPC via option

Public bug reported: SRU Justification: Impact: Since upstream commit eed85ff4c0da7 (4.16), control of PCIe DPC (Downstream Port Containment) is coupled with control of AER (Advanced Error Reporting), eliminating the option for the kernel to separately manage DPC (which was previously

[Kernel-packages] [Bug 1805693] [NEW] User reports a hang on 18.04 LTS(4.15.18) under a heavy I/O load

Public bug reported: User reports a hang under heavy I/O: The IO hang problem on our cloud is caused by IO hang in block-wbt wbt_wait. The fix commit id is 2887e41b910bb14fd847cf01ab7a5993db989d88. It is a block write buffer throttle queue lock contention and thundering herd issue in

[Kernel-packages] [Bug 1800254] Re: packet socket panic in Trusty 3.13.0-157 and later

** Tags removed: verification-needed-trusty -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1800254 Title: packet socket panic in Trusty 3.13.0-157 and later Status in linux package in

[Kernel-packages] [Bug 1800254] Re: packet socket panic in Trusty 3.13.0-157 and later

Reproducer for ptype_all corruption. Pass ifindex of an administratively down interface on the command line. ** Attachment added: "packet-fry.c" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1800254/+attachment/5206100/+files/packet-fry.c -- You received this bug notification

[Kernel-packages] [Bug 1800254] [NEW] packet socket panic in Trusty 3.13.0-157 and later

Public bug reported: SRU Justification: Due to changes added as part of c108ac876c02 ("packet: hold bind lock when rebinding to fanout hook"), it is possible for fanout_add to add a packet_type handler via dev_add_pack and then kfree the memory backing the packet_type. This corrupts the

[Kernel-packages] [Bug 1771480] Re: WARNING: CPU: 28 PID: 34085 at /build/linux-90Gc2C/linux-3.13.0/net/core/dev.c:1433 dev_disable_lro+0x87/0x90()

The dev_disable_lro warning is happening due to some logic issues in the features code. The LRO on the VLAN (bond0.200, e.g.) that's being warned about does end up being disabled by a NETDEV_FEAT_CHANGE callback when the underlying bond0's features are updated, so the warning is spurious.

[Kernel-packages] [Bug 1765241] Re: virtio_scsi race can corrupt memory, panic kernel

** Tags removed: verification-needed-xenial ** Tags added: verification-done-xenial -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1765241 Title: virtio_scsi race can corrupt memory,

[Kernel-packages] [Bug 1753662] Re: [i40e] LACP bonding start up race conditions

We've seen a similar-sounding issue in the past, but couldn't get it tracked down to the root cause. Is it possible to enable some instrumentation in the /etc/network/interfaces and obtain some data on a failing occurrence? What we've used in the past is adding something like pre-up echo 'file

[Kernel-packages] [Bug 1753662] Re: [i40e] LACP bonding start up race conditions

I would suggest testing commit de77ecd4ef02ca783f7762e04e92b3d0964be66b Author: Mahesh Bandewar Date: Mon Mar 27 11:37:33 2017 -0700 bonding: improve link-status update in mii-monitoring and commit d94708a553022bf012fa95af10532a134eeb5a52 Author: WANG Cong

[Kernel-packages] [Bug 1765241] Re: virtio_scsi race can corrupt memory, panic kernel

SRU Justification: Impact: This issue can cause system panics of systems using the virtio_scsi driver with the affected Ubuntu kernels. The issue manifests irregularly, as it is timing dependent. Fix: The issue is resolved by adding synchronization between the two code paths that race with

[Kernel-packages] [Bug 1765241] Re: virtio_scsi race can corrupt memory, panic kernel

SRU Justification: Impact: This issue can cause system panics of systems using the virtio_scsi driver with the affected Ubuntu kernels. The issue manifests irregularly, as it is timing dependent. Fix: The issue is resolved by adding synchronization between the two code paths

[Kernel-packages] [Bug 1765241] [NEW] virtio_scsi race can corrupt memory, panic kernel

ts: linux (Ubuntu) Importance: Undecided Assignee: Jay Vosburgh (jvosburgh) Status: Confirmed ** Changed in: linux (Ubuntu) Assignee: (unassigned) => Jay Vosburgh (jvosburgh) ** Changed in: linux (Ubuntu) Status: New => Confirmed -- You received this bug notific

[Kernel-packages] [Bug 1716747] Re: High system load and mouse delays - pipe A vblank wait timed out

Joe, I didn't try anything in between, I went from 4.13.0-16 to -36 and -36 started wigging out again so I backed down to -16. I can try some interim kernels next week when I don't need to do work on the laptop in question. -- You received this bug notification because you are a member of

[Kernel-packages] [Bug 1716747] Re: linux 4.12 - high system load and mouse delays - pipe A vblank wait timed out

Joe, The issue has returned on my X220 tablet; running 4.13-0.36-generic and the fully updated 17.10 user space. Every time it happens the laptop display freezes for about 10 or 15 seconds. A concurrent ssh session is unaffected. [94261.464884] pipe A vblank wait timed out [94261.464948]

[Kernel-packages] [Bug 1716747] Re: linux 4.12 - high system load and mouse delays - pipe A vblank wait timed out

Joe, No, I'm not seeing the issue now; running 4.13.0-16 for the last 10 days or so. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1716747 Title: linux 4.12 - high system load and

[Kernel-packages] [Bug 1716747] Re: linux 4.12 - high system load and mouse delays - pipe A vblank wait timed out

Albert, This is the lspci from my X220 T: -[:00]-+-00.0 Intel Corporation 2nd Generation Core Processor Family DRAM Controller +-02.0 Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller +-16.0 Intel Corporation 6 Series/C200 Series

[Kernel-packages] [Bug 1716747] Re: linux 4.12 - high system load and mouse delays - pipe A vblank wait timed out

Just a comment that I have observed this bug as well, on an X220 T. The test kernel from comment #11 also appears to resolve the problem (so far). I do not have any external USB controllers attached, though, so I'm not sure what the failure path was. -- You received this bug notification

[Kernel-packages] [Bug 1700834] Re: Intel i40e PF reset under load

** Tags removed: verification-needed-xenial ** Tags added: verification-done-xenial -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1700834 Title: Intel i40e PF reset under load Status

[Kernel-packages] [Bug 1709032] Re: Creating conntrack entry failure with kernel 4.4.0-89

The panic appears to be fixed upstream via: commit 9c3f3794926a997b1cab6c42480ff300efa2d162 Author: Liping Zhang Date: Sat Mar 25 16:35:29 2017 +0800 netfilter: nf_ct_ext: fix possible panic after nf_ct_extend_unregister If one cpu is doing

[Kernel-packages] [Bug 1697053] Re: Missing IOTLB flush causes DMAR errors with SR-IOV

proposed kernel tested by customer ** Tags removed: verification-needed-trusty ** Tags added: verification-done-trusty -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1697053 Title:

[Kernel-packages] [Bug 1700834] Re: Intel i40e PF reset under load

** Changed in: linux (Ubuntu) Status: Incomplete => Confirmed -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1700834 Title: Intel i40e PF reset under load Status in linux

[Kernel-packages] [Bug 1700834] [NEW] Intel i40e PF reset under load

Importance: Undecided Assignee: Jay Vosburgh (jvosburgh) Status: New ** Changed in: linux (Ubuntu) Assignee: (unassigned) => Jay Vosburgh (jvosburgh) -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux i

[Kernel-packages] [Bug 1697053] Re: Missing IOTLB flush causes DMAR errors with SR-IOV

** Changed in: linux (Ubuntu) Status: In Progress => Confirmed -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1697053 Title: Missing IOTLB flush causes DMAR errors with SR-IOV

[Kernel-packages] [Bug 1697053] [NEW] Missing IOTLB flush causes DMAR errors with SR-IOV

it resolves the issue. ** Affects: linux (Ubuntu) Importance: Undecided Assignee: Jay Vosburgh (jvosburgh) Status: New ** Changed in: linux (Ubuntu) Assignee: (unassigned) => Jay Vosburgh (jvosburgh) -- You received this bug notification because you are a member of

[Kernel-packages] [Bug 1687512] Re: Kernel panics on Xenial when using cgroups and strict CFS limits

Customer has verified that 4.4.0-79-generic resolves the issue in their environment that would previously panic. ** Tags removed: verification-needed-xenial ** Tags added: verification-done-xenial -- You received this bug notification because you are a member of Kernel Packages, which is

[Kernel-packages] [Bug 1683947] Re: ubuntu 4.8 kernel, virtio_net error causes NAT packets to be lost

Jason, I work for Canonical; the issue came up with one of our customers. FWIW, I debugged the issue by first using kprobes and ftrace on the kernel of a running instance to trace the packet path through the kernel. Once it seemed that the affected packets were not being dropped somewhere on

[Kernel-packages] [Bug 1683947] Re: ubuntu 4.8 kernel, virtio_net error causes NAT packets to be lost

** Changed in: linux (Ubuntu) Status: Incomplete => Confirmed -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1683947 Title: ubuntu 4.8 kernel, virtio_net error causes NAT packets

[Kernel-packages] [Bug 1683947] [NEW] ubuntu 4.8 kernel, virtio_net error causes NAT packets to be lost

test by resettting the test client instance and watch for serial output: % gcloud compute instances reset nat-client --zone us-central1-a Wait a minute or so for new boot, then check the serial-port-output as above. ** Affects: linux (Ubuntu) Importance: Undecided Assignee: Jay

[Kernel-packages] [Bug 1658491] Re: VLAN SR-IOV regression for IXGBE driver

This issue may be fixed by this upstream commit: commit f60439bc21e3337429838e477903214f5bd8277f Author: Alexander Duyck Date: Thu Aug 11 14:51:56 2016 -0700 ixgbe: Force VLNCTRL.VFE to be set in all VMDq paths When I was adding the code for enabling

[Kernel-packages] [Bug 1652348] Re: initrd dhcp fails / ignores valid response

without major rework to utilize one packet socket per interface. ** Tags removed: kernel-key ** Package changed: linux (Ubuntu) => klibc (Ubuntu) ** Changed in: klibc (Ubuntu) Status: Triaged => Confirmed ** Changed in: klibc (Ubuntu) Assignee: (unassigned) => Jay Vosburgh (

[Kernel-packages] [Bug 1652348] Re: initrd dhcp fails / ignores valid response

I have reproduced the described issue locally using the instructions from comment 35; will start looking into the cause. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1652348 Title:

[Kernel-packages] [Bug 1652348] Re: initrd dhcp fails / ignores valid response

Just a note that I'm setting up to try the reproduction instructions from comment #35 -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1652348 Title: initrd dhcp fails / ignores valid

[Kernel-packages] [Bug 1584092] Re: Docker misconfigured when using non-default overlay/underlay netmask size

I haven't tested this patch, but fanctl had the same issue, and I believe the fix is that the subnet math has to be "overlay_width + ( 32 - underlay_width )", not "overlay_width + underlay_width". Patch attached. ** Patch removed: "fanatic patch"

[Kernel-packages] [Bug 1584092] Re: Docker misconfigured when using non-default overlay/underlay netmask size

I haven't tested this patch, but fanctl had the same issue, and I believe the fix is that the subnet math has to be "overlay_width + ( 32 - underlay_width )", not "overlay_width + underlay_width". Patch attached. ** Patch added: "fanatic.patch"

[Kernel-packages] [Bug 1584092] Re: Docker misconfigured when using non-default overlay/underlay netmask size

I haven't tested this patch, but fanctl had the same issue, and I believe the fix is that the subnet math has to be "overlay_width + ( 32 - underlay_width )", not "overlay_width + underlay_width". Patch attached. ** Patch added: "fanatic patch"

[Kernel-packages] [Bug 1463911] Re: IPV6 fragmentation and mtu issue

** Tags removed: verification-needed-trusty verification-needed-vivid ** Tags added: verification-done-trusty verification-done-vivid -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1463911

[Kernel-packages] [Bug 1463911] Re: IPV6 fragmentation and mtu issue

The Wily kernel (4.2) already contains the fixes for this bug. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1463911 Title: IPV6 fragmentation and mtu issue Status in neutron:

[Kernel-packages] [Bug 1463911] Re: IPV6 fragmentation and mtu issue

Yes, the patch has been committed for the next Ubuntu kernel releases. I have no information on a Centos patch; you would need to file a bug against Centos or RHEL. No patch to Neutron is required. -- You received this bug notification because you are a member of Kernel Packages, which is

[Kernel-packages] [Bug 1508706] Re: Networking hangs on azure using hv_netvsc; bisected

SRU Justification: Impact: Bug causes easily reproducible freeze of networking on affected systems when under moderate to high network load. Ordinary benchmark tools such as iperf induce the problem without difficulty. Affected systems are virtual machine instances running on Azure,

[Kernel-packages] [Bug 1508706] Re: Networking hangs on azure using hv_netvsc; bisected

We are testing this patch immediately (overnight US time) and will report our results as soon as they are available -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1508706 Title:

[Kernel-packages] [Bug 1463911] Re: IPV6 fragmentation and mtu issue

The equivalent testing to comment #20 was also performed on the 3.13 and 3.16 kernels, additionally, a customer separately validated the 3.13 and 3.16 patches in their environment. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in

[Kernel-packages] [Bug 1463911] Re: IPV6 fragmentation and mtu issue

Test methodology performed on 3.19 kernel with patch applied: Host A: fd01:::1/64 direct connect to host C ip addr add fd01:::1/64 dev eth0 Host B: fd01:::2/64 direct connect to host C ip addr add fd01:::2/64 dev eth0 host C: direct connect interfaces for Hosts A & B bridged

[Kernel-packages] [Bug 1508706] Re: Networking hangs on azure using hv_netvsc; bisected

I have tested the patch referenced in comment #5 and it appears to resolve the network hang. I first built and tested the Ubuntu LTS 3.19.0-31.36~14.04.1 kernel and reproduced the issue using the methodology described in the original bug description. This is commit commit

[Kernel-packages] [Bug 1463911] Re: IPV6 fragmentation and mtu issue

** Patch added: "Backport patch for trusty 3.13" https://bugs.launchpad.net/nova/+bug/1463911/+attachment/4520982/+files/ubuntu-trusty-3.13-sru.patch -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu.

[Kernel-packages] [Bug 1463911] Re: IPV6 fragmentation and mtu issue

** Patch added: "Backport patch for trusty 3.16" https://bugs.launchpad.net/nova/+bug/1463911/+attachment/4520983/+files/ubuntu-trusty-3.16-sru.patch -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu.

[Kernel-packages] [Bug 1463911] Re: IPV6 fragmentation and mtu issue

SRU Justification: Impact: This bug causes issues when ip6tables modules are loaded with IPv6 fragmented packets traversing a bridge. The extant conntrack processing will reassemble the IPv6 fragments for netfilter processing, but is incapable of re-fragmenting these datagrams for

[Kernel-packages] [Bug 1463911] Re: IPV6 fragmentation and mtu issue

** Patch added: "Backport patch for vivid 3.19" https://bugs.launchpad.net/nova/+bug/1463911/+attachment/4520984/+files/ubuntu-vivid-sru.patch -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu.

[Kernel-packages] [Bug 1508706] Re: Networking hangs on azure using hv_netvsc; bisected

Yes, it did, although it seemed to be easier to reproduce with vxlan configured. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1508706 Title: Networking hangs on azure using hv_netvsc;

[Kernel-packages] [Bug 1508706] [NEW] Networking hangs on azure using hv_netvsc; bisected

Public bug reported: Running Ubuntu instances on azure, testing basic networking between two instances. This involves configuring VXLAN between the two instances and running iperf and rsync of the kernel tree between the instances, e.g., ip link add vxlan0 type vxlan id 999 local 10.88.0.12

[Kernel-packages] [Bug 1463911] Re: IPV6 fragmentation and mtu issue

The original patch had an error in it; I believe I've found it and once I verify that and clean it up a bit I"ll attach it to the bug. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu.

[Kernel-packages] [Bug 1502238] Re: bridge does not forward neighbor solicitation packets

I set up a similar configuration locally, and I see the bridge correctly forwarding the IPv6 NS packets. The ping functions as expected. I have different network cards, and used IPv6 ULA addresses (fc00:1234::/64) but I'm not sure how that would affect the bridge forwarding decision. I'm also

[Kernel-packages] [Bug 1497812] Re: i40e bug: non physical MAC outbound frames appear as copied back inbound (mirrored)

Just looking at the log, it might be this: commit fa11cb3d16a9b9b296a2b811a49faf1356240348 Author: Anjali Singhai Jain Date: Wed May 27 12:06:14 2015 -0400 i40e: Make sure to be in VEB mode if SRIOV is enabled at probe If SRIOV is enabled we need to be

[Kernel-packages] [Bug 1463911] Re: IPV6 fragmentation and mtu issue

I have done a backport of commit efb6de9b4ba0092b2c55f6a52d16294a8a698edd Author: Bernhard Thaler Date: Sat May 30 15:30:16 2015 +0200 netfilter: bridge: forward IPv6 fragmented packets to the trusty 3.13 kernel. This necessitated pulling in some bits from

[Kernel-packages] [Bug 1442828] [NEW] change for LP 1425376 breaks systemd After=network-online.target

Public bug reported: The change to ifup@.service done as part of LP 1425376 appears to break the ordering of units marked as After=network-online.target. In my specific case, a new service script with After=network-online.target is erroneously run concurrently with dhclient. As the new

[Kernel-packages] [Bug 1409123] [NEW] hw csum failure in encapsulated network topolgies

17e96834fd35997ca7cdfbf15413bcd5a36ad448 Author: Govindarajulu Varadarajan _gov...@gmx.com Date: Thu Dec 18 15:58:42 2014 +0530 enic: fix rx skb checksum commit 2c26d34bbcc0b3f30385d5587aa232289e2eed8e Author: Jay Vosburgh jay.vosbu...@canonical.com Date: Fri Dec 19 15:32:00 2014 -0800 net/core: Handle csum

[Kernel-packages] [Bug 1233175] Re: Kernel panic : mempolicy potential use-after-free on server running mongodb

** Changed in: linux (Ubuntu) Assignee: (unassigned) = Jay Vosburgh (jvosburgh) ** Changed in: linux (Ubuntu Precise) Assignee: (unassigned) = Jay Vosburgh (jvosburgh) -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux

[Kernel-packages] [Bug 1344323] [NEW] Trusty kernel network performance regression

Public bug reported: SRU Justification: Impact: Reduced TCP/IP receive performance for network devices that do not split packet headers into skb linear area (e.g., mlx4). The trusty kernel has incorporated commit eff44f9cc9a02aad53d568d3ae5020b6792ae4f6 Author: Jerry Chu hk...@google.com