Hi Zhang, > ping. > > Anyone can help merge this patch? or any other solutions? + /* If the logical block size is different, forbid write same */ + if (t->logical_block_size != b->logical_block_size && + t->max_write_same_sectors != UINT_MAX) + t->max_write_same_sectors = 0; + else + t->max_write_same_sectors = min(t->max_write_same_sectors, + b->max_write_same_sectors); + I am not particularly keen on this UINT_MAX magic. I would prefer to have the stacking driver default for lbs be set to 0 so the stacking function could avoid special-casing the first iteration. But I am not sure whether that would break any assumptions in DM/MD wrt. the logical block size being non-zero prior to calling the stacking function. Mike? Any comments? If we stick with the UINT_MAX check, the comment should at least point out why it's there. -- Martin K. Petersen Oracle Linux Engineering
