linux-kernel - Re: what's the incompatibility between hibernation and hotplug memory

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Date:	Wed, 26 Mar 2008 16:33:07 -0700
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
CC:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Pavel Machek <pavel@....cz>
Subject: Re: what's the incompatibility between hibernation and hotplug memory

Rafael J. Wysocki wrote:
> Generally, we might not be able to handle memory unplugged at a wrong time
> (eg. after we've created the image).
>   

Hot memory unplugging is distinct from memory hotplug.

> Which part of Kconfig says that exactly?
>   

mm/Kconfig:

config MEMORY_HOTPLUG
	bool "Allow for memory hot-add"
	depends on SPARSEMEM || X86_64_ACPI_NUMA
	depends on HOTPLUG && !HIBERNATION && ARCH_ENABLE_MEMORY_HOTPLUG
	depends on (IA64 || X86 || PPC64 || SUPERH)

comment "Memory hotplug is currently incompatible with Software Suspend"
	depends on SPARSEMEM && HOTPLUG && HIBERNATION


    J
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