Does this help?
dm-crypt: never use write same
Ciphertext device is not compatible with WRITE SAME,
disable it for all dmcrypt devices.
Signed-off-by: Milan Broz <mb...@redhat.com>
--- a/drivers/md/dm-crypt.c
+++ b/drivers/md/dm-crypt.c
@@ -1844,6 +1844,12 @@ static int crypt_iterate_devices(struct dm_target *ti,
return fn(ti, cc->dev, cc->start, ti->len, data);
}
+static void crypt_io_hints(struct dm_target *ti,
+ struct queue_limits *limits)
+{
+ limits->max_write_same_sectors = 0;
+}
+
static struct target_type crypt_target = {
.name = "crypt",
.version = {1, 11, 0},
@@ -1858,6 +1864,7 @@ static struct target_type crypt_target = {
.message = crypt_message,
.merge = crypt_merge,
.iterate_devices = crypt_iterate_devices,
+ .io_hints = crypt_io_hints,
};
static int __init dm_crypt_init(void)
--
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