On 10/03/2012 05:52 PM, Yasuaki Ishimatsu wrote: > We are trying to implement a physical memory hot removing function as > following thread. > > https://lkml.org/lkml/2012/9/5/201 > > But there is not enough review to merge into linux kernel. > > I think there are following blockades. > 1. no physical memory hot removable system Which kind of special machine support physical memory hot-remove now? > 2. huge patch-set > > If you have a KVM system, we can get rid of 1st blockade. Because > applying following patch, we can create memory hot removable system > on KVM guest. > > http://lists.gnu.org/archive/html/qemu-devel/2012-07/msg01389.html > > 2nd blockade is own problem. So we try to divide huge patch into > a small patch in each function as follows: > > - bug fix > - acpi framework > - kernel core > > We had already sent bug fix patches. > https://lkml.org/lkml/2012/9/27/39 > https://lkml.org/lkml/2012/10/2/83 > > The patch-set implements a framework for hot removing memory. > > 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. > > 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 intoacpi_memory_device_remove(). And it prepares > remove_memory(). But the function does nothing because we cannot > support memory hot remove. > > -- > To unsubscribe, send a message with 'unsubscribe linux-mm' in > the body to majordomo@xxxxxxxxx. For more info on Linux MM, > see: http://www.linux-mm.org/ . > Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a> > -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
