On Fri, 18 Feb 2005 12:27:36 -0600 (CST), Satish Balay <balay@xxxxxxxxxxx> wrote: > > I guess the rawhide kernel has extra checks/debugging turned on - > which can slow things down. > > Any idea what these are? Taking a quick gander through my /boot/config-2.6.10-1.1143_FC4... # # Kernel hacking # CONFIG_DEBUG_KERNEL=y CONFIG_MAGIC_SYSRQ=y # CONFIG_SCHEDSTATS is not set CONFIG_DEBUG_SLAB=y CONFIG_DEBUG_SPINLOCK=y CONFIG_DEBUG_SPINLOCK_SLEEP=y # CONFIG_DEBUG_KOBJECT is not set CONFIG_DEBUG_HIGHMEM=y CONFIG_DEBUG_BUGVERBOSE=y CONFIG_DEBUG_INFO=y # CONFIG_DEBUG_FS is not set # CONFIG_FRAME_POINTER is not set CONFIG_EARLY_PRINTK=y CONFIG_DEBUG_STACKOVERFLOW=y CONFIG_KPROBES=y CONFIG_DEBUG_STACK_USAGE=y CONFIG_DEBUG_PAGEALLOC=y CONFIG_4KSTACKS=y Probably just set all the CONFIG_DEBUG*=y there to =n. I'm not sure which would affect speed the most, but I'd guess disabling CONFIG_DEBUG_SLAB will cut down most of the extraneous memory usage (if that's as noticeable for you as it is for me on my 256 MB machine). The more debugs you keep on, though, the more chance you have of being able to usefully report any problems... (cc:ing you because I'm not sure I have my subscription set up to allow posting from this address) --wes