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acpi,memory-hotplug : implement 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 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(). The last version of this patchset is here: https://lkml.org/lkml/2012/10/26/175 Note: patch1-2 are in pm tree now. And there is a bug in patch1, so I resend them. The commit in pm tree is: patch1: 85fcb3758c10e063a2a30dfad75017097999deed patch2: d0fbb400b6f3a6191bdc5024f8733b2e2b86338f Changes from v3 to v4: 1. patch1: unlock list_lock when removing memory fails. 2. patch2: just rebase them 3. patch3-7: these patches are in -mm tree, and they conflict with this patchset, so Adrew Morton drop them from -mm tree. I rebase and merge them into this patchset. Wen Congyang (6): acpi,memory-hotplug: introduce a mutex lock to protect the list in acpi_memory_device acpi_memhotplug.c: fix memory leak when memory device is unbound from the module acpi_memhotplug acpi_memhotplug.c: free memory device if acpi_memory_enable_device() failed acpi_memhotplug.c: don't allow to eject the memory device if it is being used acpi_memhotplug.c: bind the memory device when the driver is being loaded acpi_memhotplug.c: auto bind the memory device which is hotplugged before the driver is loaded Yasuaki Ishimatsu (1): acpi,memory-hotplug : add memory offline code to acpi_memory_device_remove() drivers/acpi/acpi_memhotplug.c | 168 ++++++++++++++++++++++++++++++++--------- 1 file changed, 133 insertions(+), 35 deletions(-) -- 1.8.0 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ |
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