Messages in this thread Patch in this message | | | Date | Sat, 12 Oct 2013 14:09:41 +0800 | From | Zhang Yanfei <> | Subject | [PATCH part2 v2 8/8] x86, numa, acpi, memory-hotplug: Make movable_node have higher priority |
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From: Tang Chen <tangchen@cn.fujitsu.com>
If users specify the original movablecore=nn@ss boot option, the kernel will arrange [ss, ss+nn) as ZONE_MOVABLE. The kernelcore=nn@ss boot option is similar except it specifies ZONE_NORMAL ranges.
Now, if users specify "movable_node" in kernel commandline, the kernel will arrange hotpluggable memory in SRAT as ZONE_MOVABLE. And if users do this, all the other movablecore=nn@ss and kernelcore=nn@ss options should be ignored.
For those who don't want this, just specify nothing. The kernel will act as before.
Signed-off-by: Tang Chen <tangchen@cn.fujitsu.com> Signed-off-by: Zhang Yanfei <zhangyanfei@cn.fujitsu.com> Reviewed-by: Wanpeng Li <liwanp@linux.vnet.ibm.com> --- mm/page_alloc.c | 28 ++++++++++++++++++++++++++-- 1 files changed, 26 insertions(+), 2 deletions(-)
diff --git a/mm/page_alloc.c b/mm/page_alloc.c index dd886fa..768ea0e 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -5021,9 +5021,33 @@ static void __init find_zone_movable_pfns_for_nodes(void) nodemask_t saved_node_state = node_states[N_MEMORY]; unsigned long totalpages = early_calculate_totalpages(); int usable_nodes = nodes_weight(node_states[N_MEMORY]); + struct memblock_type *type = &memblock.memory; + + /* Need to find movable_zone earlier when movable_node is specified. */ + find_usable_zone_for_movable(); + + /* + * If movable_node is specified, ignore kernelcore and movablecore + * options. + */ + if (movable_node_is_enabled()) { + for (i = 0; i < type->cnt; i++) { + if (!memblock_is_hotpluggable(&type->regions[i])) + continue; + + nid = type->regions[i].nid; + + usable_startpfn = PFN_DOWN(type->regions[i].base); + zone_movable_pfn[nid] = zone_movable_pfn[nid] ? + min(usable_startpfn, zone_movable_pfn[nid]) : + usable_startpfn; + } + + goto out2; + } /* - * If movablecore was specified, calculate what size of + * If movablecore=nn[KMG] was specified, calculate what size of * kernelcore that corresponds so that memory usable for * any allocation type is evenly spread. If both kernelcore * and movablecore are specified, then the value of kernelcore @@ -5049,7 +5073,6 @@ static void __init find_zone_movable_pfns_for_nodes(void) goto out; /* usable_startpfn is the lowest possible pfn ZONE_MOVABLE can be at */ - find_usable_zone_for_movable(); usable_startpfn = arch_zone_lowest_possible_pfn[movable_zone]; restart: @@ -5140,6 +5163,7 @@ restart: if (usable_nodes && required_kernelcore > usable_nodes) goto restart; +out2: /* Align start of ZONE_MOVABLE on all nids to MAX_ORDER_NR_PAGES */ for (nid = 0; nid < MAX_NUMNODES; nid++) zone_movable_pfn[nid] = -- 1.7.1
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