I want to use larger time slices when the ram starts to get full to try to reduce the time spent swapping the pages in and out. I added the following to the scheduler in linux 2.6.9 and I can't figure out why it's not working. There were two different sysinfo() functions I found and this is what I think is confusing me. The site http://linux.about.com/library/cmd/blcmdl2_intro.htm says it's a system call and requires me to add stuff like: static int errno; _syscall1(int, sysinfo, struct sysinfo *, info); I think that version of it is used from programs other that the kernel so none the examples of it that I found show how it would be used from inside the kernel. The second version, I found in a source navigator http://lxr.linux.no/source/kernel/timer.c?v=2.6.10#L1234 and is saying it should work a different way. Another thing is I'm struggling to figure out what's wrong when it crashes during booting. When it does give me any info it's all just about the registers and the stack and I can't make any sense of it. #include <linux/syscalls.h> #define MIN_TIMESLICE scaleSlices * max(5 * HZ / 1000, 1) #define DEF_TIMESLICE scaleSlices * (100 * HZ / 1000) int scaleSlices = 1; /* There were two functions for filling in a sysinfo structure. This was apparantly needed for the one I tried first. I don't know if sys_sysinfo needs it.*/ static int errno; _syscall1(int, sysinfo, struct sysinfo *, info); struct sysinfo s_info; /* Flag for large time slices. * So that the swap_tuner() doesn't keep enlarging the time slices */ static int largerTSs = 0; /* This is in the middle of a function I added further down. The function is called right at the start of schedule() but this is the only line that makes it crash. It caused an opps the first time I tried to boot it and then it started looping some message repeatively last time. */ sys_sysinfo(&s_info); ---------------------------------------------------------------- This message was sent using IMP, the Internet Messaging Program. -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
