If we discard already discarded blocks, we do not need to write discard filler to the metadata, because it is already there.
Signed-off-by: Mikulas Patocka <[email protected]> Index: linux-2.6/drivers/md/dm-integrity.c =================================================================== --- linux-2.6.orig/drivers/md/dm-integrity.c +++ linux-2.6/drivers/md/dm-integrity.c @@ -1429,8 +1429,10 @@ static int dm_integrity_rw_tag(struct dm if (op == TAG_READ) { memcpy(tag, dp, to_copy); } else if (op == TAG_WRITE) { - memcpy(dp, tag, to_copy); - dm_bufio_mark_partial_buffer_dirty(b, *metadata_offset, *metadata_offset + to_copy); + if (memcmp(dp, tag, to_copy)) { + memcpy(dp, tag, to_copy); + dm_bufio_mark_partial_buffer_dirty(b, *metadata_offset, *metadata_offset + to_copy); + } } else { /* e.g.: op == TAG_CMP */ -- dm-devel mailing list [email protected] https://listman.redhat.com/mailman/listinfo/dm-devel
