From: Mike Kravetz <[email protected]>
This patch fixes two bugs with the way sparsemem interacts with memory add.
They are:
- memory leak if memmap for section already exists
- calling alloc_bootmem_node() after boot
These bugs were discovered and a first cut at the fixes were provided by
Arnd Bergmann <[email protected]> and Joel Schopp <[email protected]>.
Signed-off-by: Mike Kravetz <[email protected]>
Signed-off-by: Joel Schopp <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Arnd Bergmann <[email protected]>
---
mm/sparse.c | 9 ++++++---
1 files changed, 6 insertions(+), 3 deletions(-)
diff -puN mm/sparse.c~sparsemem-interaction-with-memory-add-bug-fixes mm/sparse.c
--- 25/mm/sparse.c~sparsemem-interaction-with-memory-add-bug-fixes Wed Apr 12 14:38:04 2006
+++ 25-akpm/mm/sparse.c Wed Apr 12 14:38:04 2006
@@ -32,7 +32,10 @@ static struct mem_section *sparse_index_
unsigned long array_size = SECTIONS_PER_ROOT *
sizeof(struct mem_section);
- section = alloc_bootmem_node(NODE_DATA(nid), array_size);
+ if (system_state == SYSTEM_RUNNING)
+ section = kmalloc_node(array_size, GFP_KERNEL, nid);
+ else
+ section = alloc_bootmem_node(NODE_DATA(nid), array_size);
if (section)
memset(section, 0, array_size);
@@ -281,9 +284,9 @@ int sparse_add_one_section(struct zone *
ret = sparse_init_one_section(ms, section_nr, memmap);
- if (ret <= 0)
- __kfree_section_memmap(memmap, nr_pages);
out:
pgdat_resize_unlock(pgdat, &flags);
+ if (ret <= 0)
+ __kfree_section_memmap(memmap, nr_pages);
return ret;
}
_
--
-
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