lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

x86: Export srat physical topology

Browse Source 
This is the counterpart to "x86: export k8 physical topology" for
SRAT. It is not as invasive because the acpi code already seperates
node setup into detection and registration steps, with the
exception of registering e820 active regions in
acpi_numa_memory_affinity_init().  This is now moved to
acpi_scan_nodes() if NUMA emulation is disabled or deferred.

acpi_numa_init() now returns a value which specifies whether an
underlying SRAT was located.  If so, that topology can be used by
the emulation code to interleave emulated nodes over physical nodes
or to register the nodes for ACPI.

acpi_get_nodes() may now be used to export the srat physical
topology of the machine for NUMA emulation.

Signed-off-by: David Rientjes <rientjes@google.com>
Cc: Andreas Herrmann <andreas.herrmann3@amd.com>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Balbir Singh <balbir@linux.vnet.ibm.com>
Cc: Ankita Garg <ankita@in.ibm.com>
Cc: Len Brown <len.brown@intel.com>
LKML-Reference: <alpine.DEB.1.00.0909251518580.14754@chino.kir.corp.google.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
David Rientjes
2009-09-25 15:20:04 -07:00
committed by Ingo Molnar
parent 8ee2debce3
commit 8716273cae
5 changed files with 33 additions and 15 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
arch/x86/kernel/setup.c
View File

@@ -938,11 +938,12 @@ void __init setup_arch(char **cmdline_p)
/*
* Parse SRAT to discover nodes.
*/
acpi_numa_init();
acpi = acpi_numa_init();
#endif
#ifdef CONFIG_K8_NUMA
k8 = !k8_numa_init(0, max_pfn);
if (!acpi)
k8 = !k8_numa_init(0, max_pfn);
#endif
initmem_init(0, max_pfn, acpi, k8);