KSM disable code is reimplementing systemctl mask command.
Note only that, but it seems a race is possible where the ksm
services may be starting at the same time as disable_ksm()
is running. I believe the mask command should fix that.
There's an important difference in this new version: we don't
try to start KSM when switching away from the cpu-partitioning
profile. This means KSM will probably remain disabled until
the next reboot.
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Helper state file for cpu-partitioning script was moved to /run/tuned.
Code for flags manipulation has been simplified.
The /run/tuned directory is explicitly cleared upon uninstallation
of Tuned to get rid of all leftovers / helper files before the reboot.
Added STORAGE_PERSISTENT variable pointing to /var/lib/tuned into
functions to be consistent.
Related: rhbz#1497182
Signed-off-by: Jaroslav Škarvada <jskarvad@redhat.com>
KSM is enabled by default when the qemu-kvm-common-rhev package is
installed. We don't want KSM to run in KVM-RT nor cpu-partitioning
hosts, as it can cause spikes or packet drops.
This series disables KSM in those profiles when they are activated.
Likewise, we re-enable KSM when the profile is de-activated in
case it's enabled by default in systemd.
Luiz Capitulino (3):
profiles: functions: add functions to disable/enable KSM
realtime-virtual-host: disable KSM
cpu-partitioning: disable KSM
profiles/cpu-partitioning/script.sh | 2 ++
profiles/functions | 37 ++++++++++++++++++++++++++++++++
profiles/realtime-virtual-host/script.sh | 3 +++
3 files changed, 42 insertions(+)
--
2.9.5
Return-Path: lcapitulino@redhat.com
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From: Luiz Capitulino <lcapitulino@redhat.com>
To: jskarvad@redhat.com
Cc: kvm-rt@redhat.com
Subject: [PATCH 1/3] profiles: functions: add functions to disable/enable KSM
Date: Tue, 3 Oct 2017 15:53:50 -0400
Message-Id: <20171003195352.22910-2-lcapitulino@redhat.com>
In-Reply-To: <20171003195352.22910-1-lcapitulino@redhat.com>
References: <20171003195352.22910-1-lcapitulino@redhat.com>
X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12
They will be used by the next commits.
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
This commit introduces functions to create and delete the
kvm modprobe file used by the realtime profiles.
This is needed because the cpu-partitioning profile wants
the same modprobe file for kvm.
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Upon stop action the script is called the following way:
script.sh stop [$HINT]
$HINT is not used if the stop is result of tuned
shutdown. $HINT is set to "profile_switch" if the stop is
result of profile switch.
Signed-off-by: Jaroslav Škarvada <jskarvad@redhat.com>
E.g.:
$ cat /sys/block/sda/queue/scheduler
noop [deadline] cfq
The 'save_sys' function needs to save 'deadline', not 'noop [deadline] cfq'.
Resolves: rhbz#1251507
Signed-off-by: Jaroslav Škarvada <jskarvad@redhat.com>
Added 'verify' shell function to the 'functions' API. This
function is optional, if defined in the script, it is called
during the verification. It's return code is checked. Function
return code '0' means verification passed, other value means
failure.
Signed-off-by: Jaroslav Škarvada <jskarvad@redhat.com>
Some filesystems that are mounted multiple times cannot
be remounted with different options. The error may
confuse users, thus it is better to silence it.
Signed-off-by: Jaroslav Škarvada <jskarvad@redhat.com>
utils: powertop2tuned changed cmdline options and several minor fixes
tuned: removed accidentaly pushed tuned-2.0/profiles/functions
tuned: some minor modifications
