The patch titled
mm: debug check for the fault vs invalidate race
has been added to the -mm tree. Its filename is
mm-debug-check-for-the-fault-vs-invalidate-race.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: mm: debug check for the fault vs invalidate race
From: Nick Piggin <npiggin@xxxxxxx>
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@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/filemap.c | 2 ++
1 file changed, 2 insertions(+)
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 +120,8 @@ 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)
_
Patches currently in -mm which might be from npiggin@xxxxxxx are
origin.patch
mm-remove-gcc-workaround.patch
mm-more-rmap-checking.patch
mm-make-read_cache_page-synchronous.patch
fs-buffer-dont-pageuptodate-without-page-locked.patch
mm-debug-check-for-the-fault-vs-invalidate-race.patch
mm-simplify-filemap_nopage.patch
mm-fix-fault-vs-invalidate-race-for-linear-mappings.patch
mm-merge-populate-and-nopage-into-fault-fixes-nonlinear.patch
mm-merge-nopfn-into-fault.patch
mm-remove-legacy-cruft.patch
exec-fix-remove_arg_zero.patch
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