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

[KAMEZAWA Hiroyuki]

On Tue, 16 Oct 2007 22:38:18 -0700 (PDT)
David Rientjes <rientjes at 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

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