Difference between revisions of "Kernel configuration"
(New page: == ACPI sleep == It is a bit tricky to make ACPI sleep and OpenVZ work together. ACPI sleep is enabled by <code>ACPI_SLEEP</code> kernel option. The following dependencies are declared i...) |
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Revision as of 16:37, 21 February 2007
ACPI sleep
It is a bit tricky to make ACPI sleep and OpenVZ work together.
ACPI sleep is enabled by ACPI_SLEEP kernel option. The following dependencies are declared in kernel configs:
ACPI_SLEEP depends on X86 && (!SMP || SUSPEND_SMP) SUSPEND_SMP depends on HOTPLUG_CPU && X86 && PM FAIRSCHED depends on SCHED_VCPU
And SCHED_VCPU is incompatible with HOTPLUG_CPU:
./kernel/cpu.c:#error "CONFIG_HOTPLUG_CPU isn't supported with CONFIG_SCHED_VCPU"
On non-SMP machine, you may disable SMP, this will resolve the conflict.
If you have SMP machine, you can only disable FAIRSCHED and SCHED_VCPU. This will loose isolation between VEs (scheduling will be performed per-task, not per-VE), but it is acceptable solution if your VEs are trusted (and it's hard to imagine untrusted VEs on notebook ;)
