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[PATCH] mm: more rmap debugging

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Add more debugging in the rmap code in an attempt to locate to source of
the occasional "mapcount went negative" assertions.

Cc: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Nick Piggin
2006-12-22 01:09:33 -08:00
committed by Linus Torvalds
parent 19900cdee2
commit 7de6b80579
5 changed files with 15 additions and 8 deletions
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mm/filemap_xip.c
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@@ -189,7 +189,7 @@ __xip_unmap (struct address_space * mapping,
/* Nuke the page table entry. */
flush_cache_page(vma, address, pte_pfn(*pte));
pteval = ptep_clear_flush(vma, address, pte);
page_remove_rmap(page);
page_remove_rmap(page, vma);
dec_mm_counter(mm, file_rss);
BUG_ON(pte_dirty(pteval));
pte_unmap_unlock(pte, ptl);