From: akpm@linux-foundation.org
From: Nick Piggin <npiggin@suse.de>
To: torvalds@linux-foundation.org
Cc: linux-mm@kvack.org, akpm@linux-foundation.org, npiggin@suse.de
Subject: [patch 6/8] mm: debug check for the fault vs invalidate race
Date: Fri, 18 May 2007 00:37:09 -0700 [thread overview]
Message-ID: <200705180737.l4I7b9K0010770@shell0.pdx.osdl.net> (raw)
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>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
mm/filemap.c | 1 +
1 file changed, 1 insertion(+)
diff -puN mm/filemap.c~mm-debug-check-for-the-fault-vs-invalidate-race mm/filemap.c
--- a/mm/filemap.c~mm-debug-check-for-the-fault-vs-invalidate-race
+++ a/mm/filemap.c
@@ -120,6 +120,7 @@ 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)
_
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reply other threads:[~2007-05-18 7:37 UTC|newest]
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