On Fri 14-03-14 10:11:43, Tejun Heo wrote: > > Also, could you please help me do understand how can I guarantee > > integrity in case of block device with big volatile > > cache and filesystem, which does not support REQ_FLUSH/FUA? > > If a device has a volatile cache but doesn't support flush, it can't > guarantee integrity. There's no way for its user to determine or > force whether certain data is on non-volatile media. It's an > inherently broken device. I think his problem was that the device does support REQ_FLUSH/FUA but the filesystem on top of it doesn't issue it properly. That's a filesystem problem so fix the filesystem... :) Which one is it? Honza -- Jan Kara <jack@xxxxxxx> SUSE Labs, CR -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
