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authorTejun Heo <tj@kernel.org>2011-05-02 14:18:53 +0200
committerTejun Heo <tj@kernel.org>2011-05-02 14:18:53 +0200
commitb0d310801a4c1f95b44357e4ebc22a9903e3bf3d (patch)
tree4a61939f1254967b88cfee59e6c3b450f70368c7 /arch/x86/mm/numa_32.c
parente6df595b37c7c033ef7400b4fdd382a2dc4f4131 (diff)
downloadop-kernel-dev-b0d310801a4c1f95b44357e4ebc22a9903e3bf3d.zip
op-kernel-dev-b0d310801a4c1f95b44357e4ebc22a9903e3bf3d.tar.gz
x86-32, NUMA: implement temporary NUMA init shims
To help transition to common NUMA init, implement temporary 32bit shims for numa_add_memblk() and numa_set_distance(). numa_add_memblk() registers the memblk and adjusts node_start/end_pfn[]. numa_set_distance() is noop. These shims will allow using 64bit NUMA init functions on 32bit and gradual transition to common NUMA init path. For detailed description, please read description of commits which make use of the shim functions. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: David Rientjes <rientjes@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: "H. Peter Anvin" <hpa@zytor.com>
Diffstat (limited to 'arch/x86/mm/numa_32.c')
-rw-r--r--arch/x86/mm/numa_32.c34
1 files changed, 34 insertions, 0 deletions
diff --git a/arch/x86/mm/numa_32.c b/arch/x86/mm/numa_32.c
index abf1247..d0369a5 100644
--- a/arch/x86/mm/numa_32.c
+++ b/arch/x86/mm/numa_32.c
@@ -414,3 +414,37 @@ int memory_add_physaddr_to_nid(u64 addr)
EXPORT_SYMBOL_GPL(memory_add_physaddr_to_nid);
#endif
+/* temporary shim, will go away soon */
+int __init numa_add_memblk(int nid, u64 start, u64 end)
+{
+ unsigned long start_pfn = start >> PAGE_SHIFT;
+ unsigned long end_pfn = end >> PAGE_SHIFT;
+
+ printk(KERN_DEBUG "nid %d start_pfn %08lx end_pfn %08lx\n",
+ nid, start_pfn, end_pfn);
+
+ if (start >= (u64)max_pfn << PAGE_SHIFT) {
+ printk(KERN_INFO "Ignoring SRAT pfns: %08lx - %08lx\n",
+ start_pfn, end_pfn);
+ return 0;
+ }
+
+ node_set_online(nid);
+ memblock_x86_register_active_regions(nid, start_pfn,
+ min(end_pfn, max_pfn));
+
+ if (!node_has_online_mem(nid)) {
+ node_start_pfn[nid] = start_pfn;
+ node_end_pfn[nid] = end_pfn;
+ } else {
+ node_start_pfn[nid] = min(node_start_pfn[nid], start_pfn);
+ node_end_pfn[nid] = max(node_end_pfn[nid], end_pfn);
+ }
+ return 0;
+}
+
+/* temporary shim, will go away soon */
+void __init numa_set_distance(int from, int to, int distance)
+{
+ /* nada */
+}
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