> I'd definitely suggest using NOCOW for any file you are doing O_DIRECT with, > as you should see _much_ better performance that way, and also don't run the > (theoretical) risk of some of the same types of corruption that swapfiles on > BTRFS can cause.
I mounted the filesystem with nodatacow as follows and it didn't help - it still drops to 0 IOPs every couple of seconds. /dev/sdi on /mnt/btrfs type btrfs (rw,nodatacow) -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
