[Devel] Re: [ckrm-tech] [RFC][PATCH 3/7] UBC: ub context and inheritance

[Chandra Seetharaman]

On Mon, 2006-08-21 at 14:32 +0400, Kirill Korotaev wrote:
> Chandra Seetharaman wrote:
> > On Wed, 2006-08-16 at 19:38 +0400, Kirill Korotaev wrote:
> > 
> >>Contains code responsible for setting UB on task,
> >>it's inheriting and setting host context in interrupts.
> >>
> >>Task references three beancounters:
> >>  1. exec_ub  current context. all resources are
> >>              charged to this beancounter.
> >>  2. task_ub  beancounter to which task_struct is
> >>              charged itself.
> > 
> > 
> > I do not see why task_ub is needed ? i do not see it being used
> > anywhere.
> it is used to charge task itself. will be heavily used in next patch set
> adding "numproc" UBC parameter.

Well, from your other responses it sounded like you are including
code/data structure/functionality only when they are used. So, I wasn't
clear if this is missed out on cleanup or really part of UBC.

Besides, if this is needed only for a specific controller, shouldn't the
controller worry about maintaining it ?

> 
> >>  3. fork_sub beancounter which is inherited by
> >>              task's children on fork
> > 
> > 
> >>From other emails it looks like renaming fork/exec to be real/effective
> > will be easier to understand.
> there is no "real". exec_ub is effective indeed,
> but fork_sub is the one to inherit on fork().

IMO, fork_cb/exec_cb doesn't convey the real meaning of the usage.
> 
> Kirill
> 
> 
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    Chandra Seetharaman               | Be careful what you choose....
              - sekharan at us.ibm.com   |      .......you may get it.
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