Messages in this thread Patch in this message | | | From | Nick Piggin <> | Subject | [patch 1/6] mm: debug check for the fault vs invalidate race | Date | Wed, 21 Feb 2007 05:49:47 +0100 (CET) |
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Add a bugcheck for Andrea's pagefault vs invalidate race. This is triggerable for both linear and nonlinear pages with a userspace test harness (using direct IO and truncate, respectively).
Signed-off-by: Nick Piggin <npiggin@suse.de>
mm/filemap.c | 2 ++ 1 file changed, 2 insertions(+)
Index: linux-2.6/mm/filemap.c =================================================================== --- linux-2.6.orig/mm/filemap.c +++ linux-2.6/mm/filemap.c @@ -120,6 +120,8 @@ void __remove_from_page_cache(struct pag page->mapping = NULL; mapping->nrpages--; __dec_zone_page_state(page, NR_FILE_PAGES); + + BUG_ON(page_mapped(page)); } void remove_from_page_cache(struct page *page) - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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