Messages in this thread | | | Date | Mon, 23 Jun 2008 15:15:12 +0200 | Subject | Re: [RFC -mm 0/6] sysv ipc: scale msgmnb with the number of cpus | From | Solofo.Ramangalahy@bull ... |
| |
Hi Manfred,
This part is more difficult to answer than the other one: > The whole configuration can be done from user space, thus I assumed that > a sysctl.conf value [...] could do the job
Yes, while this is (still) possible, this can become cumbersome with namespaces, hotplug, ...
> (or in the worst case: a dbus/hal daemon that > updates /proc/sys/kernel/msgnmb) [...]
This would probably mean one daemon per ipc namespace. The patches seems lighter.
There has been related discussions regarding kernel space vs. userspace approach in the threads: . "Change in default vm_dirty_ratio" http://lkml.org/lkml/2007/6/18/471 . "[RFC][PATCH 0/6] Automatic kernel tunables (AKT)" http://lkml.org/lkml/2007/1/16/16 (and probably others)
So it seems there is no consensus in doing it either way: kernel or user space.
Humm... now this make me think that you did not change the MSGMNB value when you changed MSGMNI and MSGMAX. Maybe that was on purpose?
-- solofo
| |