Kindly find the attachment of our new order as discussed with our
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The security state after overwrite completion is expected to remain the
same as before overwrite. Current implementation assumed that overwrite
would remove the security state and therefore removing the keys. Update
so security keys are not removed.
Dave Jiang <dave.jiang(a)intel.com>
ndctl/util/keys.c | 3 ---
1 file changed, 3 deletions(-)
diff --git a/ndctl/util/keys.c b/ndctl/util/keys.c
index c1f2e843..f315802c 100644
@@ -650,8 +650,5 @@ int ndctl_dimm_overwrite_key(struct ndctl_dimm *dimm)
if (rc < 0)
- if (key > 0)
- return discard_key(dimm);
The radix tree would rewind the index in an iterator to the lowest index
of a multi-slot entry. The XArray iterators instead leave the index
unchanged, but I overlooked that when converting DAX from the radix tree
to the XArray. Adjust the index that we use for flushing to the start
of the PMD range.
Fixes: c1901cd33cf4 "page cache: Convert find_get_entries_tag to XArray"
Reported-by: Piotr Balcer <piotr.balcer(a)intel.com>
Tested-by: Dan Williams <dan.j.williams(a)intel.com>
Signed-off-by: Matthew Wilcox <willy(a)infradead.org>
fs/dax.c | 19 +++++++++----------
1 file changed, 9 insertions(+), 10 deletions(-)
diff --git a/fs/dax.c b/fs/dax.c
index 6959837cc465..4116cd9f55dd 100644
@@ -843,9 +843,8 @@ static void dax_entry_mkclean(struct address_space *mapping, pgoff_t index,
static int dax_writeback_one(struct xa_state *xas, struct dax_device *dax_dev,
struct address_space *mapping, void *entry)
- unsigned long pfn;
+ unsigned long pfn, index, count;
long ret = 0;
- size_t size;
* A page got tagged dirty in DAX mapping? Something is seriously
@@ -894,17 +893,18 @@ static int dax_writeback_one(struct xa_state *xas, struct dax_device *dax_dev,
- * Even if dax_writeback_mapping_range() was given a wbc->range_start
- * in the middle of a PMD, the 'index' we are given will be aligned to
- * the start index of the PMD, as will the pfn we pull from 'entry'.
+ * If dax_writeback_mapping_range() was given a wbc->range_start
+ * in the middle of a PMD, the 'index' we use needs to be
+ * aligned to the start of the PMD.
* This allows us to flush for PMD_SIZE and not have to worry about
* partial PMD writebacks.
pfn = dax_to_pfn(entry);
- size = PAGE_SIZE << dax_entry_order(entry);
+ count = 1UL << dax_entry_order(entry);
+ index = xas->xa_index & ~(count - 1);
- dax_entry_mkclean(mapping, xas->xa_index, pfn);
- dax_flush(dax_dev, page_address(pfn_to_page(pfn)), size);
+ dax_entry_mkclean(mapping, index, pfn);
+ dax_flush(dax_dev, page_address(pfn_to_page(pfn)), count * PAGE_SIZE);
* After we have flushed the cache, we can clear the dirty tag. There
* cannot be new dirty data in the pfn after the flush has completed as
@@ -917,8 +917,7 @@ static int dax_writeback_one(struct xa_state *xas, struct dax_device *dax_dev,
dax_wake_entry(xas, entry, false);
- trace_dax_writeback_one(mapping->host, xas->xa_index,
- size >> PAGE_SHIFT);
+ trace_dax_writeback_one(mapping->host, xas->xa_index, count);
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