Re: [RFC V2 PATCH] kernfs: create raw version kernfs_path_len and kernfs_path
From: Thomas Gleixner
Date: Sat Feb 27 2016 - 06:46:27 EST
On Sat, 27 Feb 2016, Tejun Heo wrote:
> On Sat, Feb 27, 2016 at 12:37:23PM +0100, Thomas Gleixner wrote:
> > On Sat, 27 Feb 2016, Tejun Heo wrote:
> > > On Fri, Feb 26, 2016 at 01:47:39PM -0800, Yang Shi wrote:
> > > > Call synchronize_sched() when kernfs_node is updated since tracepoints are
> > > > protected by rcu_read_lock_sched.
> > >
> > > Adding synchronize_sched() to operations which can be triggered from
> > > userland usually turns out to be problematic. If this can't be solved
> > > any other way, I think the right thing to do is replacing the path
> > > with cgroup id as Christoph suggested.
> > Agreed. The path is not that important, right?
> It can be, but we can print out the ino and userland can match that up
> with path if necessary.
Wouldn't be cgroup id the better choice?