Or else all interrupts will get bound to (v)CPU 0. This doesn't cause issues on small boxes, but boxes with a non-trivial amount of CPUs can struggle without interrupts being balanced across available vCPUs, as the number of vCPUs offered to dom0 matches the number of physical CPUs.
For example sabro boxes (Xeon Silver 4114 x 2 sockets) would sometimes report timeouts which seem to be solved by using irqbalance in dom0. irqbalance is also available on Arm, so install unconditionally. Reported-by: Jan Beulich <[email protected]> Signed-off-by: Roger Pau Monné <[email protected]> --- ts-host-install | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/ts-host-install b/ts-host-install index 276c6af8..f79a1beb 100755 --- a/ts-host-install +++ b/ts-host-install @@ -139,7 +139,7 @@ END target_cmd_root($ho, "chmod 2775 /root"); - target_install_packages($ho, qw(ed)); + target_install_packages($ho, qw(ed irqbalance)); if ($ho->{Arch} =~ m/^(?:i386|amd64)$/) { # We don't necessarily know the CPU vendor, but the Debian # packaged microcode doesn't mind us installing both. -- 2.35.1
