Re: [PATCH] memory cgroup enhancements [1/5] force_empty for memory cgroup

KAMEZAWA Hiroyuki
2007-10-17T05:50:09Z

On Tue, 16 Oct 2007 22:38:18 -0700 (PDT)
David Rientjes <rientjes@google.com> wrote:
> > Thanks,
>
> You mean make it write-only? Typically it would be as easy as only
> specifying a mode of S_IWUSR so that it can only be written to, the
> S_IFREG is already provided by cgroup_add_file().
>
> Unfortunately, cgroups do not appear to allow that. It hardcodes
> the permissions of 0644 | S_IFREG into the cgroup_create_file() call from
> cgroup_add_file(), which is a bug. Cgroup files should be able to be
> marked as read-only or write-only depending on their semantics.
>
> So until that bug gets fixed and you're allowed to pass your own file
> modes to cgroup_add_files(), you'll have to provide the read function.
>
Hmm. it seems I have to read current cgroup code more.
Thank you for advice.

Regards,
-Kame