The patch titled
memory hotplug: create alloc_bootmem_section()
has been added to the -mm tree. Its filename is
memory-hotplug-create-alloc_bootmem_section.patch
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out what to do about this
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: memory hotplug: create alloc_bootmem_section()
From: Yasunori Goto <y-goto@xxxxxxxxxxxxxx>
alloc_bootmem_section() can a allocate specified section's area. This is used
for usemap to associate a section with a pgdat in a later patch.
Signed-off-by: Yasunori Goto <y-goto@xxxxxxxxxxxxxx>
Cc: Yinghai Lu <yhlu.kernel@xxxxxxxxx>
Cc: Badari Pulavarty <pbadari@xxxxxxxxxx>
Cc: Christoph Lameter <clameter@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/bootmem.h | 2 ++
mm/bootmem.c | 31 +++++++++++++++++++++++++++++++
2 files changed, 33 insertions(+)
diff -puN include/linux/bootmem.h~memory-hotplug-create-alloc_bootmem_section include/linux/bootmem.h
--- a/include/linux/bootmem.h~memory-hotplug-create-alloc_bootmem_section
+++ a/include/linux/bootmem.h
@@ -101,6 +101,8 @@ extern void reserve_bootmem_node(pg_data
extern void free_bootmem_node(pg_data_t *pgdat,
unsigned long addr,
unsigned long size);
+extern void *alloc_bootmem_section(unsigned long size,
+ unsigned long section_nr);
#ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE
#define alloc_bootmem_node(pgdat, x) \
diff -puN mm/bootmem.c~memory-hotplug-create-alloc_bootmem_section mm/bootmem.c
--- a/mm/bootmem.c~memory-hotplug-create-alloc_bootmem_section
+++ a/mm/bootmem.c
@@ -540,6 +540,37 @@ void * __init __alloc_bootmem_node(pg_da
return __alloc_bootmem(size, align, goal);
}
+#ifdef CONFIG_SPARSEMEM
+void * __init alloc_bootmem_section(unsigned long size,
+ unsigned long section_nr)
+{
+ void *ptr;
+ unsigned long limit, goal, start_nr, end_nr, pfn;
+ struct pglist_data *pgdat;
+
+ pfn = section_nr_to_pfn(section_nr);
+ goal = PFN_PHYS(pfn);
+ limit = PFN_PHYS(section_nr_to_pfn(section_nr + 1)) - 1;
+ pgdat = NODE_DATA(early_pfn_to_nid(pfn));
+ ptr = __alloc_bootmem_core(pgdat->bdata, size, SMP_CACHE_BYTES, goal,
+ limit);
+
+ if (!ptr)
+ return NULL;
+
+ start_nr = pfn_to_section_nr(PFN_DOWN(__pa(ptr)));
+ end_nr = pfn_to_section_nr(PFN_DOWN(__pa(ptr) + size));
+ if (start_nr != section_nr || end_nr != section_nr) {
+ printk(KERN_WARNING "alloc_bootmem failed on section %ld.\n",
+ section_nr);
+ free_bootmem_core(pgdat->bdata, __pa(ptr), size);
+ ptr = NULL;
+ }
+
+ return ptr;
+}
+#endif
+
#ifndef ARCH_LOW_ADDRESS_LIMIT
#define ARCH_LOW_ADDRESS_LIMIT 0xffffffffUL
#endif
_
Patches currently in -mm which might be from y-goto@xxxxxxxxxxxxxx are
hotplug-memory-remove-generic-__remove_pages-support.patch
powerpc-hotplug-memory-notifications-for-ppc.patch
powerpc-update-lmb-for-hotplug-memory-add-remove.patch
powerpc-provide-walk_memory_resource-for-ppc.patch
block-fix-memory-hotplug-and-bouncing-in-block-layer.patch
mm-make-mem_map-allocation-continuous-v2.patch
mm-fix-alloc_bootmem_core-to-use-fast-searching-for-all-nodes.patch
mm-offset-align-in-alloc_bootmem.patch
mm-make-reserve_bootmem-can-crossed-the-nodes.patch
memory-hotplug-register-section-node-id-to-free.patch
memory-hotplug-align-memmap-to-page-size.patch
memory-hotplug-create-alloc_bootmem_section.patch
memory-hotplug-allocate-usemap-on-the-section-with-pgdat.patch
memory-hotplug-free-memmaps-allocated-by-bootmem.patch
ipc-scale-msgmni-to-the-amount-of-lowmem.patch
ipc-scale-msgmni-to-the-number-of-ipc-namespaces.patch
ipc-define-the-slab_memory_callback-priority-as-a-constant.patch
ipc-recompute-msgmni-on-memory-add--remove.patch
ipc-invoke-the-ipcns-notifier-chain-as-a-work-item.patch
ipc-recompute-msgmni-on-ipc-namespace-creation-removal.patch
ipc-do-not-recompute-msgmni-anymore-if-explicitly-set-by-user.patch
ipc-re-enable-msgmni-automatic-recomputing-msgmni-if-set-to-negative.patch
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