On Fri, Jun 19, 2015 at 04:06:49PM +0000, Luca Porzio (lporzio) wrote: > This performance impact comes from the existing MMC SW driver solution where each IO request marked with REQ_META is handled as a "Reliable Write" operation. > Pretty much as a as a FUA write access, a "Reliable write" means that the data will be written to the non-volatile memory. > Due to the fact that every REQ_META is immediately bypassing the internal cache of eMMC device, write performance is affected significantly. > > Please advise how critical is to send REQ_META as "Reliable Write"? Not at all. > Can REQ_META be sent as a regular Write operation? Yes, and it should. The MMC driver is doing something completely dumb here. -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in
