On Tue, Jan 30, 2007 at 08:57:20PM +0100, Andrea Arcangeli wrote: > Please try yourself, it's simple enough: > > time dd if=/dev/hda of=/dev/null bs=16M count=100 > time dd if=/dev/hda of=/dev/null bs=16M count=100 iflag=sync
sorry, reading won't help much to exercise sync ;). But the direct line is enough to show the effect of I/O pipeline stall. To effectively test sync of course you want to write to a file instead (unless you want to wipe out /dev/hda ;) - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
