[ILUG] kacpid and CPU usage

[Conor Wynne]

On Tue, 2004-09-07 at 20:29, Bryan O'Donoghue wrote:
> As it stands, kacpid is consuming roughly 96% of my CPU time as I type 
> this email.
> 
> There is a noticable lag, when typing, thankfully the nice priority is 
> -10 not -19, so my system is still quasi functional.
> 
> I posted to the ACPI mailing list, to no avail. I don't think the dmesg 
> given would be of any real help in any case.
> 
> For clarity.. nothing seems to have oopsed... but, the kacpid is 
> absolutely eating it's way through my CPU bandwidth... I've been 
> noticing a lag on and off.. and was assuming it was just a lack of ram + 
> too many things happening at once, on the workstation (Slackware current)
> 
> I've tried updating to 2.6.9-rc1 and 2.6.9-rc1-mm3, in the hopes of 
> fixing the problem and playing with reiser4 on a spare software raid 
> array in my workstation, however, irrespective of whether or not the 
> ACPI issue is fixed ( a quick google shows at least one other guy with a 
> Dell of some sort had this problem two months ago or so), fact is 
> 2.6.9-rc1* seems to have some sort of problem with piping between 
> process and consequently things like man and ssh just don't work.. also, 
> I was running mm3 for a while, before it started not letting me spawn 
> any more processes, claiming I had too many open files..... so I haven't 
> be able to confirm if upversioning helps this problem, since it takes 
> about a day, for this problem to manifest itself on 2.6.8.1
> 
> Right now I'm running an vanilla 2.6.8.1, but, aside from rebuilding 
> 2.6.8.1, sans ACPI, I was wondering if anybody else out there in the 
> ether had found and resolved this problem?
> 
> It doesn't happen in the 2.4.26 that gets shipped with Slackware 10.. 
> and it probably doesn't happen the the 2.6.7 in testing in Slackware.. 
> however.. it might and I already have six different zimages in /boot.
> 
> Any ideas?

Sounds like a kernel bug (try searching bugzilla), but I dont use acpi
so dunno. 
Try booting the kernel without acpi support.

Its just a bootloader option "noapci" and that should do it. No need to
recompile the kernel.

Conor (not in the pub)