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Re: [PATCH 7/8] cgroup: mount cgroupns-root when inside non-init cgroupns

From Tejun Heo <tj@kernel.org>
Newsgroups linux.kernel
Subject Re: [PATCH 7/8] cgroup: mount cgroupns-root when inside non-init cgroupns
Date 2015-11-30 16:10 +0100
Message-ID <qAyfv-5eb-19@gated-at.bofh.it> (permalink)
References <qvy6u-3b3-3@gated-at.bofh.it> <qvy6t-3b3-1@gated-at.bofh.it> <qypq1-2Eg-9@gated-at.bofh.it> <qzjBT-6SA-5@gated-at.bofh.it>
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Hello, Serge.

On Thu, Nov 26, 2015 at 11:17:45PM -0600, Serge E. Hallyn wrote:
> > Wouldn't it be simpler to walk dentry from kernfs root than
> > duplicating dentry instantiation?
> 
> Sorry I don't think I'm following.  Are you suggesting walking the
> kn->parent chain backward and doing d_lookup() at each point starting
> with sb->s_root?

Yeah, something like that.  I wonder whether there are already code
paths doing that.  What we need is a straight path walk.  I could be
wrong but it shouldn't be that complex and if it works out we can
avoid introducing another instantiation / lookup path.

Thanks.

-- 
tejun
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Thread

[PATCH 7/8] cgroup: mount cgroupns-root when inside non-init cgroupns serge@hallyn.com - 2015-11-16 21:00 +0100
  Re: [PATCH 7/8] cgroup: mount cgroupns-root when inside non-init  cgroupns Tejun Heo <tj@kernel.org> - 2015-11-24 18:20 +0100
    Re: [PATCH 7/8] cgroup: mount cgroupns-root when inside non-init  cgroupns "Serge E. Hallyn" <serge.hallyn@ubuntu.com> - 2015-11-25 07:10 +0100
      Re: [PATCH 7/8] cgroup: mount cgroupns-root when inside non-init  cgroupns Tejun Heo <tj@kernel.org> - 2015-11-25 20:20 +0100
        Re: [PATCH 7/8] cgroup: mount cgroupns-root when inside non-init  cgroupns Tejun Heo <tj@kernel.org> - 2015-11-25 21:00 +0100
        Re: [PATCH 7/8] cgroup: mount cgroupns-root when inside non-init  cgroupns Serge Hallyn <serge.hallyn@ubuntu.com> - 2015-11-25 21:00 +0100
    Re: [PATCH 7/8] cgroup: mount cgroupns-root when inside non-init  cgroupns "Serge E. Hallyn" <serge.hallyn@ubuntu.com> - 2015-11-27 06:20 +0100
      Re: [PATCH 7/8] cgroup: mount cgroupns-root when inside non-init  cgroupns Tejun Heo <tj@kernel.org> - 2015-11-30 16:10 +0100
        Re: [PATCH 7/8] cgroup: mount cgroupns-root when inside non-init  cgroupns "Serge E. Hallyn" <serge.hallyn@ubuntu.com> - 2015-12-01 05:10 +0100
          Re: [PATCH 7/8] cgroup: mount cgroupns-root when inside non-init  cgroupns Tejun Heo <tj@kernel.org> - 2015-12-01 17:50 +0100
            Re: [PATCH 7/8] cgroup: mount cgroupns-root when inside non-init  cgroupns "Serge E. Hallyn" <serge.hallyn@ubuntu.com> - 2015-12-01 23:00 +0100
              Re: [PATCH 7/8] cgroup: mount cgroupns-root when inside non-init  cgroupns Tejun Heo <tj@kernel.org> - 2015-12-02 18:00 +0100
                Re: [PATCH 7/8] cgroup: mount cgroupns-root when inside non-init  cgroupns Tejun Heo <tj@kernel.org> - 2015-12-02 18:10 +0100
                Re: [PATCH 7/8] cgroup: mount cgroupns-root when inside non-init  cgroupns "Serge E. Hallyn" <serge.hallyn@ubuntu.com> - 2015-12-03 23:50 +0100
                Re: [PATCH 7/8] cgroup: mount cgroupns-root when inside non-init  cgroupns Tejun Heo <tj@kernel.org> - 2015-12-07 16:40 +0100
                Re: [PATCH 7/8] cgroup: mount cgroupns-root when inside non-init  cgroupns Serge Hallyn <serge.hallyn@ubuntu.com> - 2015-12-07 17:00 +0100
                Re: [PATCH 7/8] cgroup: mount cgroupns-root when inside non-init  cgroupns "Serge E. Hallyn" <serge.hallyn@ubuntu.com> - 2015-12-02 18:10 +0100
              Re: [PATCH 7/8] cgroup: mount cgroupns-root when inside non-init  cgroupns "Serge E. Hallyn" <serge.hallyn@ubuntu.com> - 2015-12-02 18:00 +0100
              Re: [PATCH 7/8] cgroup: mount cgroupns-root when inside non-init  cgroupns Tejun Heo <tj@kernel.org> - 2015-12-02 18:00 +0100

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