From: Yinghai Lu Date: Tue, 19 Feb 2008 11:20:09 +0000 (-0800) Subject: x86: get mp_bus_to_node early X-Git-Tag: v2.6.26-rc1~369^2~7 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=871d5f8dd0f7647f03facd4cb79485938d1b61ab;p=pandora-kernel.git x86: get mp_bus_to_node early Currently, on an amd k8 system with multi ht chains, the numa_node of pci devices under /sys/devices/pci0000:80/* is always 0, even if that chain is on node 1 or 2 or 3. Workaround: pcibus_to_node(bus) is used when we want to get the node that pci_device is on. In struct device, we already have numa_node member, and we could use dev_to_node()/set_dev_node() to get and set numa_node in the device. set_dev_node is called in pci_device_add() with pcibus_to_node(bus), and pcibus_to_node uses bus->sysdata for nodeid. The problem is when pci_add_device is called, bus->sysdata is not assigned correct nodeid yet. The result is that numa_node will always be 0. pcibios_scan_root and pci_scan_root could take sysdata. So we need to get mp_bus_to_node mapping before these two are called, and thus get_mp_bus_to_node could get correct node for sysdata in root bus. In scanning of the root bus, all child busses will take parent bus sysdata. So all pci_device->dev.numa_node will be assigned correctly and automatically. Later we could use dev_to_node(&pci_dev->dev) to get numa_node, and we could also could make other bus specific device get the correct numa_node too. This is an updated version of pci_sysdata and Jeff's pci_domain patch. [ mingo@elte.hu: build fix ] Signed-off-by: Yinghai Lu Signed-off-by: Ingo Molnar Signed-off-by: Thomas Gleixner --- Reading git-diff-tree failed