The commit is pushed to "branch-rh9-5.14.0-362.18.1.vz9.40.x-ovz" and will
appear at https://src.openvz.org/scm/ovz/vzkernel.git
after rh9-5.14.0-362.18.1.vz9.40.5
------>
commit 0e74f8997d7d911575667053d71986f444b389f6
Author: Konstantin Khorenko <khore...@virtuozzo.com>
Date: Thu Apr 18 21:31:40 2024 +0300
configs: Disable automatic NUMA balancing by default
In the scope of handling sporadic soft lockups inside big VMs on a VHC
node (TTASK-65390) we have found that automatic kernel NUMA balancing
triggers the problem.
Previously we has already faced problems with kernel NUMA balancing on vz7
https://virtuozzo.atlassian.net/browse/PSBM-49131
and disabled it by default in kernel.
But when rebasing onto RHEL8 we have checked the performance
(https://virtuozzo.atlassian.net/browse/PSBM-126727) and found
that having automatic kernel NUMA balancing enabled helps us a bit, thus
we have enabled it back (enabled == RHEL8/9 default setting).
Now, on vz9 (RHEL9-based kernel) we have faced the problem with sporadic
soft lockups triggered by that automatic kernel NUMA balancing.
We checked once again how automatic kernel NUMA balancing influences on
the performance and found that the results are close, so until we
investigate why memory migration between NUMA nodes takes that enormous
amount of time (in the scope of
https://virtuozzo.atlassian.net/browse/PSBM-156157), let's disable
automatic kernel NUMA balancing by default in vz9 kernel.
https://virtuozzo.atlassian.net/browse/PSBM-156155
https://pmc.acronis.work/browse/TTASK-65390
Signed-off-by: Konstantin Khorenko <khore...@virtuozzo.com>
Feature: mm: performance enhancements
---
.../custom-overrides/generic/CONFIG_NUMA_BALANCING_DEFAULT_ENABLED | 1 +
1 file changed, 1 insertion(+)
diff --git
a/redhat/configs/custom-overrides/generic/CONFIG_NUMA_BALANCING_DEFAULT_ENABLED
b/redhat/configs/custom-overrides/generic/CONFIG_NUMA_BALANCING_DEFAULT_ENABLED
new file mode 100644
index 000000000000..ef4532ae5fda
--- /dev/null
+++
b/redhat/configs/custom-overrides/generic/CONFIG_NUMA_BALANCING_DEFAULT_ENABLED
@@ -0,0 +1 @@
+CONFIG_NUMA_BALANCING_DEFAULT_ENABLED=n
_______________________________________________
Devel mailing list
Devel@openvz.org
https://lists.openvz.org/mailman/listinfo/devel
