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Re: [RFC][PATCH 0/9] Make containers kernel objects

From Ian Kent <raven@themaw.net>
Newsgroups linux.kernel
Subject Re: [RFC][PATCH 0/9] Make containers kernel objects
Date 2017-05-24 11:20 +0200
Message-ID <tKACt-pV-5@gated-at.bofh.it> (permalink)
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On Wed, 2017-05-24 at 03:26 -0500, Eric W. Biederman wrote:
> 
> So far no one has even bothered to seriously try the one solution that
> is guaranteed to work because it takes a lot of changes to kernel code.
> I believe the last effort snagged on what a pain it is to refactor the
> user mode helper infrastructure.

Yes, that's mostly true in my case although I wouldn't say I haven't looked at
it seriously but equally I haven't got anything towards it yet either, sorry.

I'm likely going to revisit this based on a couple of approaches.

One is just what you describe and I had already been looking at this some time
ago. It seems to me that adding a work queue type that starts and retains a
process until the work queue is destroyed (similar to the way the work queue sub
system starts a fail over thread for use under resource exhaustion) would be a
sensible way to do it.

This doesn't mean I think it's a good idea for reasons I've outlined in the past
but the approach does warrant the effort to work out if it can be used without
problems.

And there's also the request key infrastructure which, as it is now, gets in the
road of verifying results, *sigh*.

Ian

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Thread

[RFC][PATCH 0/9] Make containers kernel objects David Howells <dhowells@redhat.com> - 2017-05-22 18:30 +0200
  [PATCH 8/9] Honour CONTAINER_NEW_EMPTY_FS_NS David Howells <dhowells@redhat.com> - 2017-05-22 18:30 +0200
  [PATCH 3/9] Provide /proc/containers David Howells <dhowells@redhat.com> - 2017-05-22 18:30 +0200
  Re: [RFC][PATCH 0/9] Make containers kernel objects James Bottomley <James.Bottomley@HansenPartnership.com> - 2017-05-22 19:00 +0200
    Re: [RFC][PATCH 0/9] Make containers kernel objects Aleksa Sarai <asarai@suse.de> - 2017-05-22 19:20 +0200
      Re: [RFC][PATCH 0/9] Make containers kernel objects David Howells <dhowells@redhat.com> - 2017-05-23 17:00 +0200
        Re: [RFC][PATCH 0/9] Make containers kernel objects ebiederm@xmission.com (Eric W. Biederman) - 2017-05-23 17:10 +0200
          Re: [RFC][PATCH 0/9] Make containers kernel objects David Howells <dhowells@redhat.com> - 2017-05-23 17:20 +0200
            Re: [RFC][PATCH 0/9] Make containers kernel objects ebiederm@xmission.com (Eric W. Biederman) - 2017-05-23 17:30 +0200
              Re: [RFC][PATCH 0/9] Make containers kernel objects James Bottomley <James.Bottomley@HansenPartnership.com> - 2017-05-23 17:50 +0200
                Re: [RFC][PATCH 0/9] Make containers kernel objects David Howells <dhowells@redhat.com> - 2017-05-23 18:40 +0200
                Re: [RFC][PATCH 0/9] Make containers kernel objects ebiederm@xmission.com (Eric W. Biederman) - 2017-05-24 10:40 +0200
                Re: [RFC][PATCH 0/9] Make containers kernel objects Ian Kent <raven@themaw.net> - 2017-05-24 11:20 +0200
    Re: [RFC][PATCH 0/9] Make containers kernel objects Jessica Frazelle <me@jessfraz.com> - 2017-05-22 19:30 +0200
    Re: [RFC][PATCH 0/9] Make containers kernel objects Jeff Layton <jlayton@redhat.com> - 2017-05-22 20:40 +0200
      Re: [RFC][PATCH 0/9] Make containers kernel objects James Bottomley <James.Bottomley@HansenPartnership.com> - 2017-05-22 21:30 +0200
        Re: [RFC][PATCH 0/9] Make containers kernel objects Jeff Layton <jlayton@redhat.com> - 2017-05-23 00:20 +0200
        Re: [RFC][PATCH 0/9] Make containers kernel objects Ian Kent <raven@themaw.net> - 2017-05-23 12:40 +0200
    Re: [RFC][PATCH 0/9] Make containers kernel objects Ian Kent <raven@themaw.net> - 2017-05-23 11:40 +0200
    Re: [RFC][PATCH 0/9] Make containers kernel objects David Howells <dhowells@redhat.com> - 2017-05-23 16:00 +0200
      Re: [RFC][PATCH 0/9] Make containers kernel objects James Bottomley <James.Bottomley@HansenPartnership.com> - 2017-05-23 17:10 +0200
      Re: [RFC][PATCH 0/9] Make containers kernel objects ebiederm@xmission.com (Eric W. Biederman) - 2017-05-23 17:40 +0200
  Re: [RFC][PATCH 0/9] Make containers kernel objects Jessica Frazelle <me@jessfraz.com> - 2017-05-22 19:20 +0200
    Re: [RFC][PATCH 0/9] Make containers kernel objects David Howells <dhowells@redhat.com> - 2017-05-23 17:20 +0200
  Re: [RFC][PATCH 0/9] Make containers kernel objects ebiederm@xmission.com (Eric W. Biederman) - 2017-05-22 21:20 +0200
    Re: [RFC][PATCH 0/9] Make containers kernel objects Jeff Layton <jlayton@redhat.com> - 2017-05-23 00:30 +0200
      Re: [RFC][PATCH 0/9] Make containers kernel objects ebiederm@xmission.com (Eric W. Biederman) - 2017-05-23 15:10 +0200
        Re: [RFC][PATCH 0/9] Make containers kernel objects Jeff Layton <jlayton@redhat.com> - 2017-05-23 16:30 +0200
        Re: [RFC][PATCH 0/9] Make containers kernel objects Djalal Harouni <tixxdz@gmail.com> - 2017-05-23 16:40 +0200
          Re: [RFC][PATCH 0/9] Make containers kernel objects Colin Walters <walters@verbum.org> - 2017-05-23 17:00 +0200
            Re: [RFC][PATCH 0/9] Make containers kernel objects Colin Walters <walters@verbum.org> - 2017-05-23 17:40 +0200
            Re: [RFC][PATCH 0/9] Make containers kernel objects David Howells <dhowells@redhat.com> - 2017-05-23 17:40 +0200
            Re: [RFC][PATCH 0/9] Make containers kernel objects Jeff Layton <jlayton@redhat.com> - 2017-05-23 17:40 +0200
      Re: [RFC][PATCH 0/9] Make containers kernel objects Djalal Harouni <tixxdz@gmail.com> - 2017-05-23 16:30 +0200
    Re: [RFC][PATCH 0/9] Make containers kernel objects David Howells <dhowells@redhat.com> - 2017-05-23 18:20 +0200
  Re: [RFC][PATCH 0/9] Make containers kernel objects Ian Kent <raven@themaw.net> - 2017-05-23 12:20 +0200
  Re: [RFC][PATCH 0/9] Make containers kernel objects ebiederm@xmission.com (Eric W. Biederman) - 2017-05-23 17:40 +0200

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