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| author | Nick Piggin <npiggin@suse.de> | 2006-03-25 16:20:22 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-03-25 08:43:45 -0800 |
| commit | 315ab19a6d12d6af7b6957090822f3057ab7e80f (patch) | |
| tree | 7d6d51cfbd0f5e3182d4490c077e1d3139eeb9a7 /mm | |
| parent | f081a529f808ed450c22553de7b3275e0ffde9a0 (diff) | |
| download | lwn-315ab19a6d12d6af7b6957090822f3057ab7e80f.tar.gz lwn-315ab19a6d12d6af7b6957090822f3057ab7e80f.zip | |
[PATCH] mm: restore vm_normal_page check
Hugh is rightly concerned that the CONFIG_DEBUG_VM coverage has gone too
far in vm_normal_page, considering that we expect production kernels to be
shipped with the option turned off, and that the code has been under some
large changes recently.
Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/memory.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/mm/memory.c b/mm/memory.c index 80c3fb370f91..e347e106ca3a 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -395,12 +395,16 @@ struct page *vm_normal_page(struct vm_area_struct *vma, unsigned long addr, pte_ return NULL; } -#ifdef CONFIG_DEBUG_VM + /* + * Add some anal sanity checks for now. Eventually, + * we should just do "return pfn_to_page(pfn)", but + * in the meantime we check that we get a valid pfn, + * and that the resulting page looks ok. + */ if (unlikely(!pfn_valid(pfn))) { print_bad_pte(vma, pte, addr); return NULL; } -#endif /* * NOTE! We still have PageReserved() pages in the page |