I'm running Centos 6.8 with 3.18.41-20.el6.x86_64 Xen kernel. Due to this problem (e1000e Detected Hardware Unit Hang) I updated my grub.conf appending arg
pcie_aspm=off to the default kernel, but I can't reboot this hypervisor at the moment. I would like to set the variable at runtime if possible.
This is my current status:
# cat /sys/module/pcie_aspm/parameters/policy [default] performance powersave
Is it possible to
echo off > /sys/module/pcie_aspm/parameters/policy in order to achieve the same result? I think it doesn't make sense because off basically disables the function. What's the best option then? Would performance be a good workaround for my case? (see Centos6 ASPM guide)