The patch titled
fix-corruption-of-memmap-on-ia64-sparsemem-when-mem_section-is-not-a-power-of-2 fix
has been added to the -mm tree. Its filename is
fix-corruption-of-memmap-on-ia64-sparsemem-when-mem_section-is-not-a-power-of-2-fix.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: fix-corruption-of-memmap-on-ia64-sparsemem-when-mem_section-is-not-a-power-of-2 fix
From: Mel Gorman <mel@xxxxxxxxx>
On (24/07/07 22:01), Andrew Morton didst pronounce:
> On Tue, 13 Mar 2007 10:42:02 +0000 mel@xxxxxxxxx (Mel Gorman) wrote:
>
> > There are problems in the use of SPARSEMEM and pageblock flags that causes
> > problems on ia64.
> >
> > <SNIP>
>
> SuperH allmodconfig blew up:
>
> mm/sparse.c: In function `sparse_init':
> mm/sparse.c:482: error: implicit declaration of function `sparse_early_usemap_alloc'
> mm/sparse.c:482: warning: assignment makes pointer from integer without a cast
> mm/sparse.c: In function `sparse_add_one_section':
> mm/sparse.c:553: error: implicit declaration of function `__kmalloc_section_usemap'
> mm/sparse.c:553: warning: assignment makes pointer from integer without a cast
This error is due to a bad interaction between
generic-virtual-memmap-support-for-sparsemem.patch and
fix-corruption-of-memmap-on-ia64-sparsemem-when-mem_section-is-not-a-power-of-2.patch
. Functions that are needed whether CONFIG_SPARSEMEM_VMEMMAP is set are
not are depending on CONFIG_SPARSEMEM_VMEMMAP . This breaks on arch/sh
for example where SPARSEMEM may be set but not NUMA.
Signed-off-by: Mel Gorman <mel@xxxxxxxxx>
Acked-by: Andy Whitcroft <apw@xxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/sparse.c | 58 +++++++++++++++++++++++++-------------------------
1 file changed, 29 insertions(+), 29 deletions(-)
diff -puN mm/sparse.c~fix-corruption-of-memmap-on-ia64-sparsemem-when-mem_section-is-not-a-power-of-2-fix mm/sparse.c
--- a/mm/sparse.c~fix-corruption-of-memmap-on-ia64-sparsemem-when-mem_section-is-not-a-power-of-2-fix
+++ a/mm/sparse.c
@@ -220,6 +220,35 @@ void *alloc_bootmem_high_node(pg_data_t
return NULL;
}
+static unsigned long usemap_size(void)
+{
+ unsigned long size_bytes;
+ size_bytes = roundup(SECTION_BLOCKFLAGS_BITS, 8) / 8;
+ size_bytes = roundup(size_bytes, sizeof(unsigned long));
+ return size_bytes;
+}
+
+#ifdef CONFIG_MEMORY_HOTPLUG
+static unsigned long *__kmalloc_section_usemap(void)
+{
+ return kmalloc(usemap_size(), GFP_KERNEL);
+}
+#endif /* CONFIG_MEMORY_HOTPLUG */
+
+static unsigned long *sparse_early_usemap_alloc(unsigned long pnum)
+{
+ unsigned long *usemap;
+ struct mem_section *ms = __nr_to_section(pnum);
+ int nid = sparse_early_nid(ms);
+
+ usemap = alloc_bootmem_node(NODE_DATA(nid), usemap_size());
+ if (usemap)
+ return usemap;
+
+ printk(KERN_WARNING "%s: allocation failed\n", __FUNCTION__);
+ return NULL;
+}
+
#ifdef CONFIG_SPARSEMEM_VMEMMAP
/*
* Virtual Memory Map support
@@ -254,35 +283,6 @@ void *alloc_bootmem_high_node(pg_data_t
* require one PTE/TLB per PAGE_SIZE chunk of the virtual memory map.
*/
-static unsigned long usemap_size(void)
-{
- unsigned long size_bytes;
- size_bytes = roundup(SECTION_BLOCKFLAGS_BITS, 8) / 8;
- size_bytes = roundup(size_bytes, sizeof(unsigned long));
- return size_bytes;
-}
-
-#ifdef CONFIG_MEMORY_HOTPLUG
-static unsigned long *__kmalloc_section_usemap(void)
-{
- return kmalloc(usemap_size(), GFP_KERNEL);
-}
-#endif /* CONFIG_MEMORY_HOTPLUG */
-
-static unsigned long *sparse_early_usemap_alloc(unsigned long pnum)
-{
- unsigned long *usemap;
- struct mem_section *ms = __nr_to_section(pnum);
- int nid = sparse_early_nid(ms);
-
- usemap = alloc_bootmem_node(NODE_DATA(nid), usemap_size());
- if (usemap)
- return usemap;
-
- printk(KERN_WARNING "%s: allocation failed\n", __FUNCTION__);
- return NULL;
-}
-
/*
* Allocate a block of memory to be used to back the virtual memory map
* or to back the page tables that are used to create the mapping.
_
Patches currently in -mm which might be from mel@xxxxxxxxx are
allow-nodes-to-exist-that-only-contain-zone_movable.patch
sparsemem-clean-up-spelling-error-in-comments.patch
sparsemem-record-when-a-section-has-a-valid-mem_map.patch
generic-virtual-memmap-support-for-sparsemem.patch
x86_64-sparsemem_vmemmap-2m-page-size-support.patch
ia64-sparsemem_vmemmap-16k-page-size-support.patch
sparc64-sparsemem_vmemmap-support.patch
ppc64-sparsemem_vmemmap-support.patch
add-a-bitmap-that-is-used-to-track-flags-affecting-a-block-of-pages.patch
split-the-free-lists-for-movable-and-unmovable-allocations.patch
choose-pages-from-the-per-cpu-list-based-on-migration-type.patch
add-a-configure-option-to-group-pages-by-mobility.patch
drain-per-cpu-lists-when-high-order-allocations-fail.patch
move-free-pages-between-lists-on-steal.patch
group-short-lived-and-reclaimable-kernel-allocations.patch
group-high-order-atomic-allocations.patch
do-not-group-pages-by-mobility-type-on-low-memory-systems.patch
bias-the-placement-of-kernel-pages-at-lower-pfns.patch
be-more-agressive-about-stealing-when-migrate_reclaimable-allocations-fallback.patch
fix-corruption-of-memmap-on-ia64-sparsemem-when-mem_section-is-not-a-power-of-2.patch
fix-corruption-of-memmap-on-ia64-sparsemem-when-mem_section-is-not-a-power-of-2-fix.patch
bias-the-location-of-pages-freed-for-min_free_kbytes-in-the-same-max_order_nr_pages-blocks.patch
remove-page_group_by_mobility.patch
dont-group-high-order-atomic-allocations.patch
fix-calculation-in-move_freepages_block-for-counting-pages.patch
breakout-page_order-to-internalh-to-avoid-special-knowledge-of-the-buddy-allocator.patch
do-not-depend-on-max_order-when-grouping-pages-by-mobility.patch
print-out-statistics-in-relation-to-fragmentation-avoidance-to-proc-pagetypeinfo.patch
have-kswapd-keep-a-minimum-order-free-other-than-order-0.patch
only-check-absolute-watermarks-for-alloc_high-and-alloc_harder-allocations.patch
slub-slab-validation-move-tracking-information-alloc-outside-of-melstuff.patch
ext2-reservations.patch
add-__gfp_movable-for-callers-to-flag-allocations-from-high-memory-that-may-be-migrated-swap-prefetch.patch
rename-gfp_high_movable-to-gfp_highuser_movable-prefetch.patch
page-owner-tracking-leak-detector.patch
add-debugging-aid-for-memory-initialisation-problems.patch
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