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| author | Jan Kiszka <jan.kiszka@web.de> | 2006-07-14 00:23:56 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-07-14 21:53:51 -0700 |
| commit | 8757d5fa6b75e8ea906baf0309d49b980e7f9bc9 (patch) | |
| tree | ec3c1a505b5254133cd453c922beb8db226d03e6 | |
| parent | e322fedf0c59938716cdfbafbe364a170919aa1a (diff) | |
| download | op-kernel-dev-8757d5fa6b75e8ea906baf0309d49b980e7f9bc9.zip op-kernel-dev-8757d5fa6b75e8ea906baf0309d49b980e7f9bc9.tar.gz | |
[PATCH] mm: fix oom roll-back of __vmalloc_area_node
__vunmap must not rely on area->nr_pages when picking the release methode
for area->pages. It may be too small when __vmalloc_area_node failed early
due to lacking memory. Instead, use a flag in vmstruct to differentiate.
Signed-off-by: Jan Kiszka <jan.kiszka@web.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| -rw-r--r-- | include/linux/vmalloc.h | 1 | ||||
| -rw-r--r-- | mm/vmalloc.c | 7 |
2 files changed, 5 insertions, 3 deletions
diff --git a/include/linux/vmalloc.h b/include/linux/vmalloc.h index f6024ab..71b6363 100644 --- a/include/linux/vmalloc.h +++ b/include/linux/vmalloc.h @@ -11,6 +11,7 @@ struct vm_area_struct; #define VM_ALLOC 0x00000002 /* vmalloc() */ #define VM_MAP 0x00000004 /* vmap()ed pages */ #define VM_USERMAP 0x00000008 /* suitable for remap_vmalloc_range */ +#define VM_VPAGES 0x00000010 /* buffer for pages was vmalloc'ed */ /* bits [20..32] reserved for arch specific ioremap internals */ /* diff --git a/mm/vmalloc.c b/mm/vmalloc.c index 7b45079..266162d 100644 --- a/mm/vmalloc.c +++ b/mm/vmalloc.c @@ -340,7 +340,7 @@ void __vunmap(void *addr, int deallocate_pages) __free_page(area->pages[i]); } - if (area->nr_pages > PAGE_SIZE/sizeof(struct page *)) + if (area->flags & VM_VPAGES) vfree(area->pages); else kfree(area->pages); @@ -427,9 +427,10 @@ void *__vmalloc_area_node(struct vm_struct *area, gfp_t gfp_mask, area->nr_pages = nr_pages; /* Please note that the recursion is strictly bounded. */ - if (array_size > PAGE_SIZE) + if (array_size > PAGE_SIZE) { pages = __vmalloc_node(array_size, gfp_mask, PAGE_KERNEL, node); - else + area->flags |= VM_VPAGES; + } else pages = kmalloc_node(array_size, (gfp_mask & ~__GFP_HIGHMEM), node); area->pages = pages; if (!area->pages) { |
