On Tue, Jun 05, 2012 at 03:05:40PM +0900, Minchan Kim wrote: > > Let's throw it away until the author send us data. > > > > I guess it's hard to make such workload to prove it's useful normally. > But we can't make sure there isn't such workload in the world. > So I hope listen VOC. At least, Mel might require it. > I'm playing a lot of catch-up at the moment after being out for a few days so sorry for my silence on this and other threads. My initial support for this patch was based on an artifical load but one I felt was plausible to trigger if CMA was being used. In a normal workload I thought it might be possible to hit if a large process exited freeing a lot of pagetable pages from MIGRATE_UNMOVABLE blocks at the same time but that is a little unlikely and a test case would also look very artifical. Hence, I believe that if you require a real workload to demonstrate the benefit of the patch that it will be very difficult to find. The primary decision is if CMA needs this or not. I was under the impression that it was a help for CMA allocation success rates but I may be mistaken. -- Mel Gorman SUSE Labs -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>