| From | Paul Gortmaker <> | Subject | [34-longterm 102/196] m68k/mm: Set all online nodes in N_NORMAL_MEMORY | Date | Mon, 12 Mar 2012 20:20:15 -0400 |
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From: Michael Schmitz <schmitzmic@googlemail.com>
------------------- This is a commit scheduled for the next v2.6.34 longterm release. If you see a problem with using this for longterm, please comment. -------------------
commit 4aac0b4815ba592052758f4b468f253d383dc9d6 upstream.
For m68k, N_NORMAL_MEMORY represents all nodes that have present memory since it does not support HIGHMEM. This patch sets the bit at the time node_present_pages has been set by free_area_init_node. At the time the node is brought online, the node state would have to be done unconditionally since information about present memory has not yet been recorded.
If N_NORMAL_MEMORY is not accurate, slub may encounter errors since it uses this nodemask to setup per-cache kmem_cache_node data structures.
This pach is an alternative to the one proposed by David Rientjes <rientjes@google.com> attempting to set node state immediately when bringing the node online.
Signed-off-by: Michael Schmitz <schmitz@debian.org> Tested-by: Thorsten Glaser <tg@debian.org> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> --- arch/m68k/mm/motorola.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/arch/m68k/mm/motorola.c b/arch/m68k/mm/motorola.c index 02b7a03..8b3db1c 100644 --- a/arch/m68k/mm/motorola.c +++ b/arch/m68k/mm/motorola.c @@ -300,6 +300,8 @@ void __init paging_init(void) zones_size[ZONE_DMA] = m68k_memory[i].size >> PAGE_SHIFT; free_area_init_node(i, zones_size, m68k_memory[i].addr >> PAGE_SHIFT, NULL); + if (node_present_pages(i)) + node_set_state(i, N_NORMAL_MEMORY); } } -- 1.7.9.3
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