This bug was fixed in the package linux-azure - 4.18.0-1011.11
---------------
linux-azure (4.18.0-1011.11) cosmic; urgency=medium
* linux-azure: 4.18.0-1011.11 -proposed tracker (LP: #1816081)
* 4.15.0-1037 does not see all PCI devices on GPU VMs (LP: #1816106)
- Revert "PCI: hv: Make sure the bus domain is really unique"
linux-azure (4.18.0-1009.9) cosmic; urgency=medium
* Allow I/O schedulers to be loaded with modprobe in linux-azure
(LP: #1813211)
- [Config] linux-azure: Enable all IO schedulers as modules
* [Hyper-V] srcu: Lock srcu_data structure in srcu_gp_start() (LP: #1802021)
- srcu: Lock srcu_data structure in srcu_gp_start()
* CONFIG_SECURITY_SELINUX_DISABLE should be disabled on 4.15/4.18 Azure
(LP: #1813866)
- [Config]: disable CONFIG_SECURITY_SELINUX_DISABLE
[ Ubuntu: 4.18.0-15.16 ]
* Ubuntu boot failure. 4.18.0-14 boot stalls. (does not boot) (LP: #1814555)
- Revert "drm/i915/ringbuffer: Delay after EMIT_INVALIDATE for gen4/gen5"
* Userspace break as a result of missing patch backport (LP: #1813873)
- tty: Don't hold ldisc lock in tty_reopen() if ldisc present
-- Stefan Bader <stefan.ba...@canonical.com> Fri, 15 Feb 2019 17:16:24
+0100
** Changed in: linux-azure (Ubuntu Cosmic)
Status: Fix Committed => Fix Released
** Changed in: linux-azure (Ubuntu Bionic)
Status: Fix Committed => Fix Released
** CVE added: https://cve.mitre.org/cgi-bin/cvename.cgi?name=2017-5715
** CVE added: https://cve.mitre.org/cgi-bin/cvename.cgi?name=2017-5753
** CVE added: https://cve.mitre.org/cgi-bin/cvename.cgi?name=2017-5754
** CVE added: https://cve.mitre.org/cgi-bin/cvename.cgi?name=2018-14625
** CVE added: https://cve.mitre.org/cgi-bin/cvename.cgi?name=2018-14633
** CVE added: https://cve.mitre.org/cgi-bin/cvename.cgi?name=2018-15471
** CVE added: https://cve.mitre.org/cgi-bin/cvename.cgi?name=2018-16882
** CVE added: https://cve.mitre.org/cgi-bin/cvename.cgi?name=2018-18653
** CVE added: https://cve.mitre.org/cgi-bin/cvename.cgi?name=2018-18710
** CVE added: https://cve.mitre.org/cgi-bin/cvename.cgi?name=2018-18955
** CVE added: https://cve.mitre.org/cgi-bin/cvename.cgi?name=2018-19407
** CVE added: https://cve.mitre.org/cgi-bin/cvename.cgi?name=2018-5391
** CVE added: https://cve.mitre.org/cgi-bin/cvename.cgi?name=2018-6559
** CVE added: https://cve.mitre.org/cgi-bin/cvename.cgi?name=2018-7755
** CVE added: https://cve.mitre.org/cgi-bin/cvename.cgi?name=2018-9363
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https://bugs.launchpad.net/bugs/1813211
Title:
Allow I/O schedulers to be loaded with modprobe in linux-azure
Status in linux-azure package in Ubuntu:
Invalid
Status in linux-azure source package in Bionic:
Fix Released
Status in linux-azure source package in Cosmic:
Fix Released
Bug description:
There was a previous request in bug
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1671203 to limit
the IO scheduler to NOOP in linux-azure. The other schedulers were
turned off and NOOP was made the default.
However with new upstream releases, new schedulers where added and
linux-azure inherited the default config value for them from the
master kernel. That's why there are some IO schedulers built as
modules in the extra package (mq-deadline and kyber-iosched). In order
to use those two modules, one needs to install the -extra package and
modprobe the modules first:
# tail /sys/block/sd*/queue/scheduler
==> /sys/block/sda/queue/scheduler <==
[none]
==> /sys/block/sdb/queue/scheduler <==
[none]
# apt install linux-modules-extra-4.15.0-1036-azure
# modprobe kyber-iosched
# tail /sys/block/sd*/queue/scheduler
==> /sys/block/sda/queue/scheduler <==
[none] kyber
==> /sys/block/sdb/queue/scheduler <==
[none] kyber
# modprobe mq-deadline
# tail /sys/block/sd*/queue/scheduler
==> /sys/block/sda/queue/scheduler <==
[none] kyber mq-deadline
==> /sys/block/sdb/queue/scheduler <==
[none] kyber mq-deadline
The schedulers cfq and deadline have been completely disabled in LP bug
#1671203 so they cannot be added with modprobe.
This is a request to move back the cfq and deadline schedulers along
with the mq-deadline and kyber-iosched schedulers to the main linux-
azure package (in other words, not in the -extra package) and allow
the users to be able to modprobe the schedulers when needed.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux-azure/+bug/1813211/+subscriptions
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