On Tue, May 29, 2007 at 01:11:41PM +0200, Geert Uytterhoeven wrote: > > This looks very inefficient. Just set sg_tablesize of your driver > > to 1 to avoid getting mutiple segments. > > The disadvantage of setting sg_tablesize = 1 is that the driver will get small > requests (PAGE_SIZE) most of the time, which is very bad for performance.
If you set .clustering = 1 in your host template you will frequently get larger requests. For any sane hypervisor or hardware the copy should be worth than that. Then again a sane hardware or hypervisor would support SG requests.. - 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/
