Messages in this thread Patch in this message | | | From | Reza Arbab <> | Subject | [PATCH v3 4/5] powerpc/mm: restore top-down allocation when using movable_node | Date | Sun, 25 Sep 2016 13:36:55 -0500 |
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At boot, the movable_node option sets bottom-up memblock allocation.
This reduces the chance that, in the window before movable memory has been identified, an allocation for the kernel might come from a movable node. By going bottom-up, early allocations will most likely come from the same node as the kernel image, which is necessarily in a nonmovable node.
Then, once any known hotplug memory has been marked, allocation can be reset back to top-down. On x86, this is done in numa_init(). This patch does the same on power, in numa initmem_init().
Signed-off-by: Reza Arbab <arbab@linux.vnet.ibm.com> --- arch/powerpc/mm/numa.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/arch/powerpc/mm/numa.c b/arch/powerpc/mm/numa.c index d7ac419..fdf1e69 100644 --- a/arch/powerpc/mm/numa.c +++ b/arch/powerpc/mm/numa.c @@ -945,6 +945,9 @@ void __init initmem_init(void) max_low_pfn = memblock_end_of_DRAM() >> PAGE_SHIFT; max_pfn = max_low_pfn; + /* bottom-up allocation may have been set by movable_node */ + memblock_set_bottom_up(false); + if (parse_numa_properties()) setup_nonnuma(); else -- 1.8.3.1
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