On Thu, 2006-11-02 at 12:08 +0300, Pavel Emelianov wrote:
> [snip]
>
> > I think that having a "tasks" file and a "threads" file in each
> > container directory would be a clean way to handle it:
> >
> > "tasks" : read/write complete process members
> > "threads" : read/write individual thread members
>
> I've just thought of it.
>
> Beancounter may have more than 409 tasks, while configfs
> doesn't allow attributes to store more than PAGE_SIZE bytes
> on read. So how would you fill so many tasks in one page?
To be clear that's a limitation of configfs as an interface. In the
Resource Groups code, for example, there is no hard limitation on length
of the underlying list. This is why we're talking about a filesystem
interface and not necessarily a configfs interface.
> I like the idea of writing pids/tids to these files, but
> printing them back is not that easy.
That depends on how you do it. For instance, if you don't have an
explicit list of tasks in the group (rough cost: 1 list head per task)
then yes, it could be difficult.
Cheers,
-Matt Helsley
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