There is a performance regression of lmbench lat_proc fork result on ia64.
in 2.6.10 I got Process fork+exit:164.8438 microseconds. in 2.6.11-rc2 Process fork+exit:183.8621 microseconds. I believe this regression was caused by the 4-level page tables change. Since most of the kernel time spend in lat_proc fork is copy_page_range in fork path and clear_page_range in the exit path. Now they are 1 level deeper. Though pud and pgd is same on IA64, there is still some overhead introduced I think. Are any other architectures seeing the same sort of results? Zou Nan hai - 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/
