On (03/21/18 10:10), Maninder Singh wrote: > (Added cover letter to avoid much text in patch description) > > LZ4 specification defines 2 byte offset length for 64 KB data. > But in case of ZRAM we compress data per page and in most of > architecture PAGE_SIZE is 4KB. So we can decide offset length based > on actual offset value. For this we can reserve 1 bit to decide offset > length (1 byte or 2 byte). 2 byte required only if ofsset is greater than 127, > else 1 byte is enough. So what happens if I compress the data on a system with no dyn offset and then send it over the network to a machine which has dyn offset? Or, say, I have a USB stick with a compression enabled FS, store files on a dyn offset enabled PC and then mount that USB stick on a machine with no dyn offset support. And vice versa. -ss
