Re: Inquiry: Should we remove "isolcpus= kernel boot option? (may have realtime uses)

[Max Krasnyansky <maxk@qualcomm.com>]

Paul Jackson wrote:
> Andi wrote:
>> I occasionally recommended it to people because it was much easier
>> to explain than replacing init.
> 
> Definitely ... I'd do the same in such cases.
> 

btw I'm putting together a set of scripts that I call "syspart" (for "system
partitioning") which creates cpusets, sets up IRQ affinity, etc at boot. We
can make your init replacement a part of that package. You could then tell
people to
1. Install syspart rpm
2. Change boot opts to "init=/sbin/syspart par0_cpus=0-3 par0_mems=0-2 par0_init"

The thing will then create /dev/cpuset/par0 with cpus0-3 and mems0-2 and put
/sbin/init into that cpuset.

With the exception of the #1 it's as easy to explain as "isolcpus=".

Paul, I beleive you mentioned a while ago that the tools you guys use for this
aren't open source. Has that changed ? If not I'll write my own. I have all
the scripts ready to go but as you pointed out it has to be a standalone
statically linked binary.

Thanx
Max