The patch titled
fix invalidate_inode_pages2_range() to not clear ret
has been added to the -mm tree. Its filename is
fix-invalidate_inode_pages2_range-to-not-clear-ret.patch
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The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: fix invalidate_inode_pages2_range() to not clear ret
From: Hisashi Hifumi <[EMAIL PROTECTED]>
DIO invalidates page cache through invalidate_inode_pages2_range().
invalidate_inode_pages2_range() sets ret=-EIO when
invalidate_complete_page2() fails, but this ret is cleared if
do_launder_page() succeed on a page of next index.
In this case, dio is carried out even if invalidate_complete_page2() fails
on some pages.
This can cause inconsistency between memory and blocks on HDD because the
page cache still exists.
Signed-off-by: Hisashi Hifumi <[EMAIL PROTECTED]>
Cc: Badari Pulavarty <[EMAIL PROTECTED]>
Cc: Ken Chen <[EMAIL PROTECTED]>
Cc: Zach Brown <[EMAIL PROTECTED]>
Cc: Nick Piggin <[EMAIL PROTECTED]>
Cc: Trond Myklebust <[EMAIL PROTECTED]>
Cc: "J. Bruce Fields" <[EMAIL PROTECTED]>
Cc: Chuck Lever <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
---
mm/truncate.c | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)
diff -puN mm/truncate.c~fix-invalidate_inode_pages2_range-to-not-clear-ret
mm/truncate.c
--- a/mm/truncate.c~fix-invalidate_inode_pages2_range-to-not-clear-ret
+++ a/mm/truncate.c
@@ -392,6 +392,7 @@ int invalidate_inode_pages2_range(struct
pgoff_t next;
int i;
int ret = 0;
+ int ret2 = 0;
int did_range_unmap = 0;
int wrapped = 0;
@@ -439,9 +440,11 @@ int invalidate_inode_pages2_range(struct
}
}
BUG_ON(page_mapped(page));
- ret = do_launder_page(mapping, page);
- if (ret == 0 && !invalidate_complete_page2(mapping,
page))
- ret = -EIO;
+ ret2 = do_launder_page(mapping, page);
+ if (ret2 == 0 && !invalidate_complete_page2(mapping,
page))
+ ret2 = -EIO;
+ if (ret2 < 0)
+ ret = ret2;
unlock_page(page);
}
pagevec_release(&pvec);
_
Patches currently in -mm which might be from [EMAIL PROTECTED] are
fix-invalidate_inode_pages2_range-to-not-clear-ret.patch
ext3-fdatasync-should-skip-metadata-writeout-when-overwriting.patch
ext4-fdatasync-should-skip-metadata-writeout-when-overwriting.patch
-
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