28 Sep
2005
28 Sep
'05
10:04 p.m.
On 9/28/05, Peder Hedlund <peder(a)musikhuset.org> wrote:
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
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