Re: [RFC][PATCH 4/7] UBC: syscalls (user interface)

From: Rohit Seth
Date: Thu Aug 17 2006 - 13:04:02 EST

On Thu, 2006-08-17 at 16:04 +0400, Kirill Korotaev wrote:
> >>Add the following system calls for UB management:
> >> 1. sys_getluid - get current UB id
> >> 2. sys_setluid - changes exec_ and fork_ UBs on current
> >> 3. sys_setublimit - set limits for resources consumtions
> >>
> >
> >
> > Why not have another system call for getting the current limits?
> will add sys_getublimit().
> > But as I said in previous mail, configfs seems like a better choice for
> > user interface. That way user has to go to one place to read/write
> > limits, see the current usage and other stats.
> Check another email about interfaces. I have arguments against it :/

...and I'm still not convinced that syscall is the right approach.

> > I think there should be a check here for seeing if the new limits are
> > lower than the current usage of a resource. If so then take appropriate
> > action.
> any idea what exact action to add here?
> Looks like can be added when needed, agree?

When you have the support of user memory, then operations like flush the
extra pages belonging to the container to disk seems reasonable.


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