On 2/6/06, Bill Bitner <[EMAIL PROTECTED]> wrote: > There is mention of it and a pointer to more information on the Linux > pages. Did you not see section "Consider using the Linux Fixed I/O Buffer > featu
Good. I had indeed overlooked that. My apologies. I'm happy to see also MDC being advertised as medication. It's worth to realize that even when the data is not in MDC there still is a benefit because when the I/O is eligable for MDC, CP drives the I/O directly as a cache miss into pages above the bar and then copies to a guest page above the bar. This trick even works when you set the limits for MDC fairly low (I think I have even seen it work with 0M 0M). There's CPU cost for copying that page, but it's far less than paging it. Rob -- Rob van der Heij rvdheij @ gmail.com Velocity Software, Inc
