Messages in this thread | | | Date | Fri, 30 Nov 2012 14:37:41 +0800 | From | Tang Chen <> | Subject | Re: [Patch v4 00/12] memory-hotplug: hot-remove physical memory |
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Hi Andrew,
On 11/28/2012 03:27 AM, Andrew Morton wrote: >> >> - acpi framework >> https://lkml.org/lkml/2012/10/26/175 > > What's happening with the acpi framework? has it received any feedback > from the ACPI developers?
About ACPI framework, we are trying to do the following.
The memory device can be removed by 2 ways: 1. send eject request by SCI 2. echo 1 >/sys/bus/pci/devices/PNP0C80:XX/eject
In the 1st case, acpi_memory_disable_device() will be called. In the 2nd case, acpi_memory_device_remove() will be called. acpi_memory_device_remove() will also be called when we unbind the memory device from the driver acpi_memhotplug or a driver initialization fails.
acpi_memory_disable_device() has already implemented a code which offlines memory and releases acpi_memory_info struct . But acpi_memory_device_remove() has not implemented it yet.
So the patch prepares the framework for hot removing memory and adds the framework into acpi_memory_device_remove().
All the ACPI related patches have been put into the linux-next branch of the linux-pm.git tree as v3.8 material.Please refer to the following url. https://lkml.org/lkml/2012/11/2/160
So for now, with this patch set, we can do memory hot-remove on x86_64 linux.
I do hope you would merge them before 3.8-rc1, so that we can use this functionality in 3.8.
As we are still testing all memory hotplug related functionalities, I hope we can do the bug fix during 3.8 rc.
Thanks. :)
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