On Mon, 2008-05-12 at 23:37 -0700, menage@google.com wrote:
> plain text document attachment (cgroup_write_string.patch)
> This patch adds a write_string() method for cgroups control files. The
> semantics are that a buffer is copied from userspace to kernelspace
> and the handler function invoked on that buffer.  Any control group
> locking is done after the copy from userspace has occurred. The buffer
> is guaranteed to be nul-terminated, and no longer than max_write_len
> (defaulting to 64 bytes if unspecified). Later patches will convert
> existing raw file write handlers in control group subsystems to use
> this method.
> 
> Signed-off-by: Paul Menage <menage@google.com>

I haven't looked at this very thoroughly but I think the goal of this
patch is good. Can't this patch and the conversions precede your locking
changes?

Cheers,
	-Matt Helsley

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