3.13.11-ckt15 -stable review patch. If anyone has any objections, please let
me know.
------------------
From: Joe Thornber <e...@redhat.com>
commit 1e32134a5a404e80bfb47fad8a94e9bbfcbdacc5 upstream.
If the incoming bio is a WRITE and completely covers a block then we
don't bother to do any copying for a promotion operation. Once this is
done the cache block and origin block will be different, so we need to
set it to 'dirty'.
Signed-off-by: Joe Thornber <e...@redhat.com>
Signed-off-by: Mike Snitzer <snit...@redhat.com>
Signed-off-by: Kamal Mostafa <ka...@canonical.com>
---
drivers/md/dm-cache-target.c | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)
diff --git a/drivers/md/dm-cache-target.c b/drivers/md/dm-cache-target.c
index b943ef1..4a1a491 100644
--- a/drivers/md/dm-cache-target.c
+++ b/drivers/md/dm-cache-target.c
@@ -937,10 +937,14 @@ static void migration_success_post_commit(struct
dm_cache_migration *mg)
}
} else {
- clear_dirty(cache, mg->new_oblock, mg->cblock);
- if (mg->requeue_holder)
+ if (mg->requeue_holder) {
+ clear_dirty(cache, mg->new_oblock, mg->cblock);
cell_defer(cache, mg->new_ocell, true);
- else {
+ } else {
+ /*
+ * The block was promoted via an overwrite, so it's
dirty.
+ */
+ set_dirty(cache, mg->new_oblock, mg->cblock);
bio_endio(mg->new_ocell->holder, 0);
cell_defer(cache, mg->new_ocell, false);
}
--
1.9.1
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