On 9/28/05, Peder Hedlund <peder@xxxxxxxxxxxxxx> wrote: > > You can try each one (I think) by adding a boot time option to grub.conf > > elevator=deadline > > or > > elevator=cfq > > or you can change the running scheduler w/o rebooting by doing > echo deadline > /sys/block/hda/queue/scheduler > > For latency, I'd run the latest 2.6.13 (it's .2 now). > 2.6.12 had some bugs in its rlimits code that's fixed in 13. > Also make sure you have the patched PAM and an adusted > /etc/security/limits.conf to make proper use of rlimits. > > - Peder > Peder, Interesting. Thanks. This method allows you to change the scheduler for an individual drive. I presume that my method changes the default scheduler for everything, but I have not tested that. One thing that seems to not exist in ck-sources that I used successfully in one of the kernels I ran that has Ingo's stuff in it was the ability to set certain ISRs to threaded or non-threaded operation. I used to echo a 1 or 0 to /proc/irq/5/hdsp (or something like that) and this would make the ISR threaded or non-threaded. Soes naythign like this exist in ck-sources? Thanks, Mark
