Bisect result:
cab4604d2bb86315c120630af75a5f012e476596 is the first bad commit
commit cab4604d2bb86315c120630af75a5f012e476596
Author: Boris Ostrovsky <boris.ostrov...@oracle.com>
Date: Fri Mar 18 10:11:07 2016 -0400
xen/events: Mask a moving irq
BugLink: http://bugs.launchpad.net/bugs/1571034
commit ff1e22e7a638a0782f54f81a6c9cb139aca2da35 upstream.
Moving an unmasked irq may result in irq handler being invoked on both
source and target CPUs.
With 2-level this can happen as follows:
On source CPU:
evtchn_2l_handle_events() ->
generic_handle_irq() ->
handle_edge_irq() ->
eoi_pirq():
irq_move_irq(data);
/***** WE ARE HERE *****/
if (VALID_EVTCHN(evtchn))
clear_evtchn(evtchn);
If at this moment target processor is handling an unrelated event in
evtchn_2l_handle_events()'s loop it may pick up our event since target's
cpu_evtchn_mask claims that this event belongs to it *and* the event is
unmasked and still pending. At the same time, source CPU will continue
executing its own handle_edge_irq().
With FIFO interrupt the scenario is similar: irq_move_irq() may result
in a EVTCHNOP_unmask hypercall which, in turn, may make the event
pending on the target CPU.
We can avoid this situation by moving and clearing the event while
keeping event masked.
Signed-off-by: Boris Ostrovsky <boris.ostrov...@oracle.com>
Signed-off-by: David Vrabel <david.vra...@citrix.com>
Signed-off-by: Kamal Mostafa <ka...@canonical.com>
:040000 040000 dcaea6af1e798cf41920479a8ef000f9ecd9edb2
de7990a681d7a717184418adb9a2399fe1f7d0fc M drivers
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https://bugs.launchpad.net/bugs/1593621
Title:
Kernel panic after migration between XenServer 6.5 hosts
Status in linux package in Ubuntu:
Confirmed
Bug description:
Problem: after live migration from one XenServer 6.5 server to another
XenServer 6.5 the Ubuntu VM crashes (see attached screenshot).
Affected verions (at least):
1. Ubuntu 14.04 (3.19.0-61-generic)
2. Ubuntu 16.04 (4.4.0-24-generic)
Not affected versions:
1.Ubuntu 14.04 (3.19.0-49-generic)
The issue is not dependent on installed XenServer updates.
---
AlsaDevices:
total 0
crw-rw---- 1 root audio 116, 1 Jun 16 11:23 seq
crw-rw---- 1 root audio 116, 33 Jun 16 11:23 timer
AplayDevices: Error: [Errno 2] No such file or directory
ApportVersion: 2.14.1-0ubuntu3.21
Architecture: amd64
ArecordDevices: Error: [Errno 2] No such file or directory
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq',
'/dev/snd/timer'] failed with exit code 1:
CRDA: Error: [Errno 2] No such file or directory
CurrentDmesg: [ 69.046113] nf_conntrack version 0.5.0 (7868 buckets, 31472
max)
DistroRelease: Ubuntu 14.04
HibernationDevice: RESUME=UUID=250f9548-2a14-41c1-bc6e-63199d6e9236
InstallationDate: Installed on 2016-02-02 (136 days ago)
InstallationMedia: Ubuntu-Server 14.04.3 LTS "Trusty Tahr" - Beta amd64
(20150805)
IwConfig:
lo no wireless extensions.
eth1 no wireless extensions.
eth0 no wireless extensions.
Lsusb:
Bus 001 Device 002: ID 0627:0001 Adomax Technology Co., Ltd
Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
MachineType: Xen HVM domU
Package: linux (not installed)
PciMultimedia:
ProcFB: 0 EFI VGA
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-61-generic
root=UUID=5a4cba3d-3be6-4a07-9c55-d5ea7b52585e ro ipv6.disable=1 net.ifnames=0
biosdevname=0
ProcVersionSignature: Ubuntu 3.19.0-61.69~14.04.1-generic 3.19.8-ckt21
RelatedPackageVersions:
linux-restricted-modules-3.19.0-61-generic N/A
linux-backports-modules-3.19.0-61-generic N/A
linux-firmware 1.127.22
RfKill: Error: [Errno 2] No such file or directory
Tags: trusty
Uname: Linux 3.19.0-61-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups:
WifiSyslog:
_MarkForUpload: True
dmi.bios.date: 05/11/2016
dmi.bios.vendor: Xen
dmi.bios.version: 4.4.1-xs125381
dmi.chassis.type: 1
dmi.chassis.vendor: Xen
dmi.modalias:
dmi:bvnXen:bvr4.4.1-xs125381:bd05/11/2016:svnXen:pnHVMdomU:pvr4.4.1-xs125381:cvnXen:ct1:cvr:
dmi.product.name: HVM domU
dmi.product.version: 4.4.1-xs125381
dmi.sys.vendor: Xen
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