[dm-devel] reinstate path not working

Benjamin Marzinski bmarzins at redhat.com
Mon Jul 6 17:45:15 UTC 2015


On Tue, Jun 30, 2015 at 11:22:37AM +0530, Tejaswini Poluri wrote:
>    Thanks Ben. So should I push the code to the upstream and get an approval?
>    Regards,

Yes. Thanks!

-Ben

>    Tejaswini
>    On Tue, Jun 30, 2015 at 12:50 AM, Benjamin Marzinski
>    <[1]bmarzins at redhat.com> wrote:
> 
>      On Fri, Jun 26, 2015 at 12:21:48PM +0530, Tejaswini Poluri wrote:
>      >    Yes I agree that having the same code in both cli_add_map() and
>      ev_add_map
>      >    is not necessary. Hence I would suggest removing get_refwwid() code
>      from
>      >    ev_add_map as it is not being used by anyone.
>      >
>      >    ev_add_map(param, NULL, vecs) would create the multipath device by
>      using
>      >    the get_refwwid() code and but all the functions above it like
>      >    (dm_get_minor, dm_get_major and dm_mapname) would fail and it
>      wouldn't
>      >    enter any of the other code in ev_add_map like
>      >    1.dm_map_present,
>      >    2.add_map_without_path
>      >    3. sync_map_state
>      >    which are responsible for registering the map and displaying it.
>      >
>      >    So, I think moving the below code from ev_add_map to cli_add_map
>      should be
>      >    a good idea right.
>      >
>      >    r = get_refwwid(dev, DEV_DEVMAP, vecs->pathvec,&refwwid);
>      >    >
>      >    >            if (refwwid) {
>      >    >                    r = coalesce_paths(vecs, NULL, refwwid,0);
>      >    >                    dm_lib_release();
>      >    >            }
>      >    What do u think?
> 
>      I agree. We aren't using the code in ev_add_map, so it's presence there
>      is simply confusing.
> 
>      -Ben
>      >
>      >    Regards,
>      >    Tejaswini
>      >    On Fri, Jun 26, 2015 at 4:32 AM, Benjamin Marzinski
>      >    <[1][2]bmarzins at redhat.com> wrote:
>      >
>      >      On Tue, Jun 23, 2015 at 03:48:26PM +0530, Tejaswini Poluri wrote:
>      >      >    Hi Ben,
>      >      >
>      >      >    This is regarding the add map issue I have been discussing.
>      Posting
>      >      the
>      >      >    issue again to remind.
>      >      >
>      >      >    Case 1 : remove and add map.
>      >      >    root at x86-generic-64:~# multipathd -k'show maps'
>      >      >    name    sysfs uuid
>      >      >    dmpath0 dm-0  1IET_00010001
>      >      >    root at x86-generic-64:~# multipathd -k'remove map dmpath0'
>      >      >    ok
>      >      >    root at x86-generic-64:~# multipathd -k'show maps'
>      >      >    root at x86-generic-64:~# multipathd -k'add map dmpath0'
>      >      >    ok
>      >      >    root at x86-generic-64:~# multipathd -k'show maps'
>      >      >    root at x86-generic-64:~#
>      >      >    Once a map is removed, we are able to add it only using
>      #multipath 
>      >      >    command and not using multipathd tools.
>      >      >
>      >      >    I have fixed the problem with two approaches. I would like
>      you to
>      >      review
>      >      >    the same.
>      >      >    Patch1 : By making 'remove map dmpath0' to remove only the
>      map and
>      >      not the
>      >      >    device. I have added extra functions discard_map and
>      dm_remove_map
>      >      so as
>      >      >    to not interfere with the existing code.
>      >      >
>      >      >    Patch 2: The approach you have suggested.By getting wwid
>      from the
>      >      mapname
>      >      >    and doing coalesce_paths. I have just moved the following
>      code in
>      >      >    ev_add_map to cli_add_map.
>      >
>      >      This is the general idea we'd like to go with.  However, looking
>      at the
>      >      latest upstream code, I don't think you should pull code in from
>      >      ev_add_map() to cli_add_map() like your patch does. cli_add_map()
>      >      already calls ev_add_map(), and ev_add_map() is certainly able to
>      add
>      >      the map if it doesn't already exist.
>      >
>      >      You would just need to call it with
>      >
>      >      ev_add_map(param, NULL, vecs);
>      >
>      >      and ev_add_map() will happily create you a new multipath device. 
>      All
>      >      you need to do is make sure that all the functions that
>      ev_add_map()
>      >      calls with alias can accept a NULL value there.
>      >
>      >      This might not be the best way to go about this, however.  It
>      turns out
>      >      that right now, even though ev_add_map() technically has the
>      ability to
>      >      create new maps, nothing currently uses it, and it really doesn't
>      make
>      >      sense for it to be there. Instead of just copying that code, you
>      could
>      >      pull the map creation code out of ev_add_map() and add it to
>      >      cli_add_map(), for those situations where the requested device
>      doesn't
>      >      already exist.
>      >
>      >      But having the code in both cli_add_map() and ev_add_map() when
>      one
>      >      already calls the other doesn't seem necessary.
>      >
>      >      -Ben
>      >
>      >      >
>      >      >    r = get_refwwid(dev, DEV_DEVMAP, vecs->pathvec,&refwwid);
>      >      >
>      >      >            if (refwwid) {
>      >      >                    r = coalesce_paths(vecs, NULL, refwwid,0);
>      >      >                    dm_lib_release();
>      >      >            }
>      >      >
>      >      >    changed dev to param.
>      >      >
>      >      >    I have tested the same in all 3 versions -0.4.8, 0.4.9 and
>      0.5.0.
>      >      It would
>      >      >    be great if you can review the same so that it doesn't cause
>      any
>      >      extra
>      >      >    side effects.
>      >      >    I guess Patch2 is the way u have suggested me in the
>      previous mail.
>      >      Please
>      >      >    review it and share your views.
>      >      >    Regards,
>      >      >    Tejaswini
>      >      >    On Fri, Jun 12, 2015 at 2:21 AM, Benjamin Marzinski
>      >      >    <[1][2][3]bmarzins at redhat.com> wrote:
>      >      >
>      >      >      On Wed, Jun 10, 2015 at 11:46:51AM +0530, Tejaswini Poluri
>      wrote:
>      >      >      >       
>      >      >      >    >    We are testing multipathd tools with all the
>      possible
>      >      options
>      >      >      and the
>      >      >      >    >    following fails.
>      >      >      >    >
>      >      >      >    >    Case 1 : remove and add map.
>      >      >      >    >    root at x86-generic-64:~# multipathd -k'show maps'
>      >      >      >    >    name    sysfs uuid
>      >      >      >    >    dmpath0 dm-0  1IET_00010001
>      >      >      >    >    root at x86-generic-64:~# multipathd -k'remove map
>      >      dmpath0'
>      >      >      >    >    ok
>      >      >      >    >    root at x86-generic-64:~# multipathd -k'show maps'
>      >      >      >    >    root at x86-generic-64:~# multipathd -k'add map
>      dmpath0'
>      >      >      >    >    ok
>      >      >      >    >    root at x86-generic-64:~# multipathd -k'show maps'
>      >      >      >    >    root at x86-generic-64:~#
>      >      >      >    >    Once a map is removed, we are able to add it
>      only using
>      >      >      #multipath 
>      >      >      >    >    command and not using multipathd tools.
>      >      >      >
>      >      >      >    It is working the way it was designed, but possibly
>      it would
>      >      make
>      >      >      sense
>      >      >      >    to change the design.
>      >      >      >
>      >      >      >    You have mentioned that it would make sense to change
>      the
>      >      design to
>      >      >      add
>      >      >      >    map. Are there plans to change the design ?
>      >      >      >    I am trying to understand the code flow to change the
>      >      design. Can
>      >      >      you
>      >      >      >    guide me if we should stop removing the device from
>      in the
>      >      remove
>      >      >      map code
>      >      >      >    flow or start adding the device and the map in the
>      add map
>      >      code
>      >      >      flow.
>      >      >      >
>      >      >      >     have tried to understand the remove map code flow of
>      >      multipathd in
>      >      >      0.4.8
>      >      >      >    code.
>      >      >
>      >      >      I think that we want multipath to actually remove the map
>      >      (instead of
>      >      >      just not monitoring it) when you call "remove map <map>".
>      We just
>      >      want
>      >      >      "add map <map>" to try to create the map if it doesn't
>      exist.  To
>      >      do
>      >      >      that, you would need to first firgure out what WWID is
>      associated
>      >      with
>      >      >      <map>. Presumably, <map> could either be an alias, wwid,
>      or even
>      >      the
>      >      >      name of a path in the map. Once you found the map, you
>      would have
>      >      to
>      >      >      call the code to create the map.
>      >      >
>      >      >      Also, to answer your IRC question, no the 0.4.8 code is
>      not still
>      >      being
>      >      >      developed upstream.  All upstream patches only go against
>      the
>      >      current
>      >      >      head. There are no other upstream branches.
>      >      >
>      >      >      -Ben
>      >      >      >
>      >      >      >    ev_remove_map (char * devname, struct vectors * vecs)
>      >      >      >
>      >      >      >              flush_map(mpp, vecs);
>      >      >      >
>      >      >      >                           dm_flush_map(mpp->alias,
>      >      DEFAULT_TARGET);
>      >      >      >
>      >      >      >                                     if
>      >      (!dm_map_present(mapname))
>      >      >      >
>      >      >      >                                            return 0;
>      >      >      >
>      >      >      >           if (dm_type(mapname, type) <= 0)
>      >      >      >
>      >      >      >                   return 1;
>      >      >      >
>      >      >      >           if (dm_remove_partmaps(mapname))
>      >      >      >
>      >      >      >                   return 1;
>      >      >      >
>      >      >      >           if (dm_get_opencount(mapname)) {
>      >      >      >
>      >      >      >                   condlog(2, "%s: map in use", mapname);
>      >      >      >
>      >      >      >                   return 1;
>      >      >      >
>      >      >      >           }      
>      >      >      >
>      >      >      >           r = dm_simplecmd(DM_DEVICE_REMOVE, mapname);
>      >      >      >
>      >      >      >           if (r) {
>      >      >      >
>      >      >      >                   condlog(4, "multipath map %s removed",
>      >      mapname);
>      >      >      >
>      >      >      >                                                  return
>      0;
>      >      >      >
>      >      >      >                                           }
>      >      >      >
>      >      >      >     
>      >      >      >
>      >      >      >                            orphan_paths(vecs->pathvec,
>      mpp);
>      >      >      >
>      >      >      >                            remove_map(mpp, vecs,
>      >      stop_waiter_thread,
>      >      >      1);
>      >      >      >
>      >      >      >    Is removing this below line, the right step to stop
>      removing
>      >      the
>      >      >      device ?
>      >      >      >    r = dm_simplecmd(DM_DEVICE_REMOVE, mapname);
>      >      >      >
>      >      >      >    Regards,
>      >      >      >
>      >      >      >    Tejaswini
>      >      >      >
>      >      >      >    On Mon, Jun 8, 2015 at 11:15 AM, Tejaswini Poluri
>      >      >      >    <[1][2][3][4]tejaswinipoluri3 at gmail.com> wrote:
>      >      >      >
>      >      >      >      Thanks a lot Ben for the quick and detailed reply.
>      I have
>      >      been
>      >      >      >      struggling to understand and conclude the issues
>      with
>      >      multipath
>      >      >      as I am
>      >      >      >      the only one working from my team. Your inputs help
>      me a
>      >      lot.
>      >      >      Thanks
>      >      >      >      again.
>      >      >      >      Regards,
>      >      >      >      Tejaswini
>      >      >      >      On Sat, Jun 6, 2015 at 3:36 AM, Benjamin Marzinski
>      >      >      >      <[2][3][4][5]bmarzins at redhat.com> wrote:
>      >      >      >
>      >      >      >        On Fri, Jun 05, 2015 at 02:31:20PM +0530,
>      Tejaswini
>      >      Poluri
>      >      >      wrote:
>      >      >      >        >    Hii Ben,
>      >      >      >        >
>      >      >      >        >    We are testing multipathd tools with all the
>      >      possible
>      >      >      options and
>      >      >      >        the
>      >      >      >        >    following fails.
>      >      >      >        >
>      >      >      >        >    Case 1 : remove and add map.
>      >      >      >        >    root at x86-generic-64:~# multipathd -k'show
>      maps'
>      >      >      >        >    name    sysfs uuid
>      >      >      >        >    dmpath0 dm-0  1IET_00010001
>      >      >      >        >    root at x86-generic-64:~# multipathd -k'remove
>      map
>      >      dmpath0'
>      >      >      >        >    ok
>      >      >      >        >    root at x86-generic-64:~# multipathd -k'show
>      maps'
>      >      >      >        >    root at x86-generic-64:~# multipathd -k'add map
>      >      dmpath0'
>      >      >      >        >    ok
>      >      >      >        >    root at x86-generic-64:~# multipathd -k'show
>      maps'
>      >      >      >        >    root at x86-generic-64:~#
>      >      >      >        >    Once a map is removed, we are able to add it
>      only
>      >      using
>      >      >      >        #multipath 
>      >      >      >        >    command and not using multipathd tools.
>      >      >      >
>      >      >      >        It is working the way it was designed, but
>      possibly it
>      >      would
>      >      >      make
>      >      >      >        sense
>      >      >      >        to change the design.  The "remove map" command,
>      not
>      >      only stops
>      >      >      >        multipathd from monitoring the multipath device,
>      but it
>      >      removes
>      >      >      it
>      >      >      >        from
>      >      >      >        the system as well.  The "add map" command makes
>      >      multipath
>      >      >      monitor an
>      >      >      >        already existing multipath device that in wasn't
>      >      previously
>      >      >      >        monitoring.
>      >      >      >        These commands do this for historical reasons. 
>      >      multipathd
>      >      >      wasn't
>      >      >      >        originally in charge of creating multipath
>      devices,
>      >      multipath
>      >      >      was. 
>      >      >      >        Once
>      >      >      >        it had created the device, it ran
>      >      >      >
>      >      >      >        multipathd -k"add map <MAP>"
>      >      >      >
>      >      >      >        to make multipathd start monitoring it.  However
>      things
>      >      haven't
>      >      >      worked
>      >      >      >        this way since RHEL4, so possibly "add map"
>      should
>      >      actually
>      >      >      create the
>      >      >      >        device if it doesn't currently exist.
>      >      >      >        >    Case 2 : Active paths  test case
>      >      >      >        >    # while true ; do sleep 3 ; multipathd
>      -k'remove
>      >      path sdb'
>      >      >      ;
>      >      >      >        multipathd
>      >      >      >        >    -k'add path sdb' ; multipathd -k'show maps
>      status'
>      >      ; done
>      >      >      >        >    ok
>      >      >      >        >    ok
>      >      >      >        >    name failback queueing paths dm-st
>      >      >      >        >    dmpath0 - - 1 active // It should be 2.
>      >      >      >
>      >      >      >        This is simply a timing issue.  What you are
>      seeing it
>      >      the
>      >      >      number of
>      >      >      >        active paths.  These are paths that the kernel
>      can use.
>      >      The
>      >      >      "add path"
>      >      >      >        command doesn't update the kernel state.  This
>      happens
>      >      later in
>      >      >      >        response
>      >      >      >        to the kernel reloading the device table. So, in
>      a
>      >      second or
>      >      >      two, this
>      >      >      >        will say 2, as expected.
>      >      >      >
>      >      >      >        >    We would like to know if the test cases are
>      valid
>      >      and if
>      >      >      these
>      >      >      >        are bugs or
>      >      >      >        >    any design issues.
>      >      >      >        >
>      >      >      >        >    Case 3 : Fail path and reinstate path
>      >      >      >        >    root at x86-generic-64:~# multipathd -k"fail
>      path
>      >      sdc";
>      >      >      multipathd
>      >      >      >        >    -k'reinstate path sdc'; multipathd -k"show
>      paths";
>      >      >      >        >    >    [ 3962.708523] device-mapper:
>      multipath:
>      >      Failing path
>      >      >      8:32.
>      >      >      >        >    >    ok
>      >      >      >        >    >    ok
>      >      >      >        >    >    hcil    dev dev_t pri dm_st   chk_st  
>      >      next_check
>      >      >      >        >    >    4:0:0:1 sdc 8:32  1   [active][faulty]
>      >      ..........
>      >      >      1/20  
>      >      >      >        <==CHECK
>      >      >      >        >    >    5:0:0:1 sdd 8:48  1   [active][ready] 
>      >      XX........
>      >      >      4/20
>      >      >      >        >    sdc path becomes [active][ready] only after
>      the
>      >      polling
>      >      >      interval
>      >      >      >        but not
>      >      >      >        >    immediately after the reinstate path
>      command.
>      >      >      >        >    You have answered that this is a design
>      issue. But
>      >      we have
>      >      >      heard
>      >      >      >        from our
>      >      >      >        >    test team that the same test case works in
>      RHEL6.
>      >      Did you
>      >      >      observe
>      >      >      >        it?
>      >      >      >        >    I am also finding that the test cases fail
>      because
>      >      we are
>      >      >      trying
>      >      >      >        to do
>      >      >      >        >    multiple commands at one shot.  Please share
>      your
>      >      thoughts
>      >      >      so
>      >      >      >        that it
>      >      >      >        >    could help me in debugging the issues
>      further.
>      >      >      >        >
>      >      >      >
>      >      >      >        It's totally possible that the checker state is
>      >      immediately
>      >      >      updated in
>      >      >      >        RHEL6.  Like I said before, what it currently
>      does,
>      >      although
>      >      >      correct,
>      >      >      >        is confusing, and perhaps we need a different
>      checker
>      >      state for
>      >      >      paths
>      >      >      >        where the "fail path" command has been used.
>      >      >      >
>      >      >      >        -Ben
>      >      >      >        >    Regards,
>      >      >      >        >    Tejaswini
>      >      >      >        >    On Tue, May 19, 2015 at 5:37 PM, Tejaswini
>      Poluri
>      >      >      >        >    <[1][3][4][5][6]tejaswinipoluri3 at gmail.com>
>      wrote:
>      >      >      >        >
>      >      >      >        >      Thanks a lot Ben. I will look into it
>      more. 
>      >      >      >        >      On Mon, May 18, 2015 at 9:57 PM, Benjamin
>      >      Marzinski
>      >      >      >        >      <[2][4][5][6][7]bmarzins at redhat.com>
>      wrote:
>      >      >      >        >
>      >      >      >        >        On Mon, May 18, 2015 at 02:09:27PM
>      +0530,
>      >      Tejaswini
>      >      >      Poluri
>      >      >      >        wrote:
>      >      >      >        >        >    Hii,
>      >      >      >        >        >    We are trying to test multipath
>      setup in
>      >      our
>      >      >      target and
>      >      >      >        tried the
>      >      >      >        >        various
>      >      >      >        >        >    commands of multipathd demaon and
>      we find
>      >      the
>      >      >      following
>      >      >      >        error:
>      >      >      >        >        >    root at x86-generic-64:~# multipathd
>      -k"fail
>      >      path
>      >      >      sdc";
>      >      >      >        multipathd
>      >      >      >        >        >    -k'reinstate path
>      >      >      >        >        >    sdc'; multipathd -k"show paths";
>      >      >      >        >        >    [ 3962.708523] device-mapper:
>      multipath:
>      >      Failing
>      >      >      >        path 8:32.
>      >      >      >        >        >    ok
>      >      >      >        >        >    ok
>      >      >      >        >        >    hcil    dev dev_t pri dm_st 
>       chk_st 
>      >       next_check
>      >      >      >        >        >    4:0:0:1 sdc 8:32  1 
>       [active][faulty]
>      >      ..........
>      >      >      1/20 
>      >      >      >          <<<===
>      >      >      >        >        CHECK
>      >      >      >        >        >    5:0:0:1 sdd 8:48  1 
>       [active][ready] 
>      >      XX........
>      >      >      4/20
>      >      >      >        >        >    sdc path becomes [active][ready]
>      only
>      >      after the
>      >      >      polling
>      >      >      >        interval
>      >      >      >        >        but not
>      >      >      >        >        >    immediately after the reinstate
>      path
>      >      command. 
>      >      >      >        >        >    I am observing this in latest
>      multipath
>      >      tools in
>      >      >      ubuntu
>      >      >      >        machine
>      >      >      >        >        as well.
>      >      >      >        >        >    Please let me know if its a known
>      issue or
>      >      if I
>      >      >      am doing
>      >      >      >        >        something wrong.
>      >      >      >        >        >    Regards.
>      >      >      >        >        >    Tejaswini
>      >      >      >        >
>      >      >      >        >        the reinstate command is supposed to
>      reinstate
>      >      the
>      >      >      device
>      >      >      >        with the
>      >      >      >        >        kernel, and it does that. The checker
>      state
>      >      doesn't
>      >      >      change
>      >      >      >        until the
>      >      >      >        >        next time that the path is checked.  I
>      agree
>      >      that it's
>      >      >      odd
>      >      >      >        that the
>      >      >      >        >        check state switches to faulty as soon
>      as you
>      >      fail the
>      >      >      path,
>      >      >      >        but it
>      >      >      >        >        doesn't switch back until the next check
>      after
>      >      you
>      >      >      reinistate
>      >      >      >        it.
>      >      >      >        >
>      >      >      >        >        The issue is that multipathd needs to
>      override
>      >      the
>      >      >      checker
>      >      >      >        output,
>      >      >      >        >        so that a failed path won't be
>      immeditately
>      >      >      reinstated.  Once
>      >      >      >        the
>      >      >      >        >        path comes back, multipathd wants to
>      record the
>      >      switch
>      >      >      in the
>      >      >      >        checker
>      >      >      >        >        thread, so that it can refresh path
>      information
>      >      what
>      >      >      wasn't
>      >      >      >        >        automatically done when the path was
>      >      reinstated. 
>      >      >      However, it
>      >      >      >        may make
>      >      >      >        >        more sense to have a different checker
>      state
>      >      for when
>      >      >      the
>      >      >      >        device is
>      >      >      >        >        in the failed state, so that it's
>      obvious that
>      >      the
>      >      >      checker
>      >      >      >        state is
>      >      >      >        >        being overruled.
>      >      >      >        >
>      >      >      >        >        -Ben
>      >      >      >        >
>      >      >      >        >        > --
>      >      >      >        >        > dm-devel mailing list
>      >      >      >        >        > [3][5][6][7][8]dm-devel at redhat.com
>      >      >      >        >        >
>      >      >     
>      [4][6][7][8][9]https://www.redhat.com/mailman/listinfo/dm-devel
>      >      >      >        >
>      >      >      >        >        --
>      >      >      >        >        dm-devel mailing list
>      >      >      >        >        [5][7][8][9][10]dm-devel at redhat.com
>      >      >      >        >       
>      >      >     
>      [6][8][9][10][11]https://www.redhat.com/mailman/listinfo/dm-devel
>      >      >      >        >
>      >      >      >        > References
>      >      >      >        >
>      >      >      >        >    Visible links
>      >      >      >        >    1.
>      mailto:[9][10][11][12]tejaswinipoluri3 at gmail.com
>      >      >      >        >    2.
>      mailto:[10][11][12][13]bmarzins at redhat.com
>      >      >      >        >    3.
>      mailto:[11][12][13][14]dm-devel at redhat.com
>      >      >      >        >    4.
>      >      >     
>      [12][13][14][15]https://www.redhat.com/mailman/listinfo/dm-devel
>      >      >      >        >    5.
>      mailto:[13][14][15][16]dm-devel at redhat.com
>      >      >      >        >    6.
>      >      >     
>      [14][15][16][17]https://www.redhat.com/mailman/listinfo/dm-devel
>      >      >      >
>      >      >      > References
>      >      >      >
>      >      >      >    Visible links
>      >      >      >    1. mailto:[16][17][18]tejaswinipoluri3 at gmail.com
>      >      >      >    2. mailto:[17][18][19]bmarzins at redhat.com
>      >      >      >    3. mailto:[18][19][20]tejaswinipoluri3 at gmail.com
>      >      >      >    4. mailto:[19][20][21]bmarzins at redhat.com
>      >      >      >    5. mailto:[20][21][22]dm-devel at redhat.com
>      >      >      >    6.
>      [21][22][23]https://www.redhat.com/mailman/listinfo/dm-devel
>      >      >      >    7. mailto:[22][23][24]dm-devel at redhat.com
>      >      >      >    8.
>      [23][24][25]https://www.redhat.com/mailman/listinfo/dm-devel
>      >      >      >    9. mailto:[24][25][26]tejaswinipoluri3 at gmail.com
>      >      >      >   10. mailto:[25][26][27]bmarzins at redhat.com
>      >      >      >   11. mailto:[26][27][28]dm-devel at redhat.com
>      >      >      >   12.
>      [27][28][29]https://www.redhat.com/mailman/listinfo/dm-devel
>      >      >      >   13. mailto:[28][29][30]dm-devel at redhat.com
>      >      >      >   14.
>      [29][30][31]https://www.redhat.com/mailman/listinfo/dm-devel
>      >      >
>      >      > References
>      >      >
>      >      >    Visible links
>      >      >    1. mailto:[31][32]bmarzins at redhat.com
>      >      >    2. mailto:[32][33]tejaswinipoluri3 at gmail.com
>      >      >    3. mailto:[33][34]bmarzins at redhat.com
>      >      >    4. mailto:[34][35]tejaswinipoluri3 at gmail.com
>      >      >    5. mailto:[35][36]bmarzins at redhat.com
>      >      >    6. mailto:[36][37]dm-devel at redhat.com
>      >      >    7. [37][38]https://www.redhat.com/mailman/listinfo/dm-devel
>      >      >    8. mailto:[38][39]dm-devel at redhat.com
>      >      >    9. [39][40]https://www.redhat.com/mailman/listinfo/dm-devel
>      >      >   10. mailto:[40][41]tejaswinipoluri3 at gmail.com
>      >      >   11. mailto:[41][42]bmarzins at redhat.com
>      >      >   12. mailto:[42][43]dm-devel at redhat.com
>      >      >   13. [43][44]https://www.redhat.com/mailman/listinfo/dm-devel
>      >      >   14. mailto:[44][45]dm-devel at redhat.com
>      >      >   15. [45][46]https://www.redhat.com/mailman/listinfo/dm-devel
>      >      >   16. mailto:[46][47]tejaswinipoluri3 at gmail.com
>      >      >   17. mailto:[47][48]bmarzins at redhat.com
>      >      >   18. mailto:[48][49]tejaswinipoluri3 at gmail.com
>      >      >   19. mailto:[49][50]bmarzins at redhat.com
>      >      >   20. mailto:[50][51]dm-devel at redhat.com
>      >      >   21. [51][52]https://www.redhat.com/mailman/listinfo/dm-devel
>      >      >   22. mailto:[52][53]dm-devel at redhat.com
>      >      >   23. [53][54]https://www.redhat.com/mailman/listinfo/dm-devel
>      >      >   24. mailto:[54][55]tejaswinipoluri3 at gmail.com
>      >      >   25. mailto:[55][56]bmarzins at redhat.com
>      >      >   26. mailto:[56][57]dm-devel at redhat.com
>      >      >   27. [57][58]https://www.redhat.com/mailman/listinfo/dm-devel
>      >      >   28. mailto:[58][59]dm-devel at redhat.com
>      >      >   29. [59][60]https://www.redhat.com/mailman/listinfo/dm-devel
>      >
>      > References
>      >
>      >    Visible links
>      >    1. mailto:[61]bmarzins at redhat.com
>      >    2. mailto:[62]bmarzins at redhat.com
>      >    3. mailto:[63]tejaswinipoluri3 at gmail.com
>      >    4. mailto:[64]bmarzins at redhat.com
>      >    5. mailto:[65]tejaswinipoluri3 at gmail.com
>      >    6. mailto:[66]bmarzins at redhat.com
>      >    7. mailto:[67]dm-devel at redhat.com
>      >    8. [68]https://www.redhat.com/mailman/listinfo/dm-devel
>      >    9. mailto:[69]dm-devel at redhat.com
>      >   10. [70]https://www.redhat.com/mailman/listinfo/dm-devel
>      >   11. mailto:[71]tejaswinipoluri3 at gmail.com
>      >   12. mailto:[72]bmarzins at redhat.com
>      >   13. mailto:[73]dm-devel at redhat.com
>      >   14. [74]https://www.redhat.com/mailman/listinfo/dm-devel
>      >   15. mailto:[75]dm-devel at redhat.com
>      >   16. [76]https://www.redhat.com/mailman/listinfo/dm-devel
>      >   17. mailto:[77]tejaswinipoluri3 at gmail.com
>      >   18. mailto:[78]bmarzins at redhat.com
>      >   19. mailto:[79]tejaswinipoluri3 at gmail.com
>      >   20. mailto:[80]bmarzins at redhat.com
>      >   21. mailto:[81]dm-devel at redhat.com
>      >   22. [82]https://www.redhat.com/mailman/listinfo/dm-devel
>      >   23. mailto:[83]dm-devel at redhat.com
>      >   24. [84]https://www.redhat.com/mailman/listinfo/dm-devel
>      >   25. mailto:[85]tejaswinipoluri3 at gmail.com
>      >   26. mailto:[86]bmarzins at redhat.com
>      >   27. mailto:[87]dm-devel at redhat.com
>      >   28. [88]https://www.redhat.com/mailman/listinfo/dm-devel
>      >   29. mailto:[89]dm-devel at redhat.com
>      >   30. [90]https://www.redhat.com/mailman/listinfo/dm-devel
>      >   31. mailto:[91]bmarzins at redhat.com
>      >   32. mailto:[92]tejaswinipoluri3 at gmail.com
>      >   33. mailto:[93]bmarzins at redhat.com
>      >   34. mailto:[94]tejaswinipoluri3 at gmail.com
>      >   35. mailto:[95]bmarzins at redhat.com
>      >   36. mailto:[96]dm-devel at redhat.com
>      >   37. [97]https://www.redhat.com/mailman/listinfo/dm-devel
>      >   38. mailto:[98]dm-devel at redhat.com
>      >   39. [99]https://www.redhat.com/mailman/listinfo/dm-devel
>      >   40. mailto:[100]tejaswinipoluri3 at gmail.com
>      >   41. mailto:[101]bmarzins at redhat.com
>      >   42. mailto:[102]dm-devel at redhat.com
>      >   43. [103]https://www.redhat.com/mailman/listinfo/dm-devel
>      >   44. mailto:[104]dm-devel at redhat.com
>      >   45. [105]https://www.redhat.com/mailman/listinfo/dm-devel
>      >   46. mailto:[106]tejaswinipoluri3 at gmail.com
>      >   47. mailto:[107]bmarzins at redhat.com
>      >   48. mailto:[108]tejaswinipoluri3 at gmail.com
>      >   49. mailto:[109]bmarzins at redhat.com
>      >   50. mailto:[110]dm-devel at redhat.com
>      >   51. [111]https://www.redhat.com/mailman/listinfo/dm-devel
>      >   52. mailto:[112]dm-devel at redhat.com
>      >   53. [113]https://www.redhat.com/mailman/listinfo/dm-devel
>      >   54. mailto:[114]tejaswinipoluri3 at gmail.com
>      >   55. mailto:[115]bmarzins at redhat.com
>      >   56. mailto:[116]dm-devel at redhat.com
>      >   57. [117]https://www.redhat.com/mailman/listinfo/dm-devel
>      >   58. mailto:[118]dm-devel at redhat.com
>      >   59. [119]https://www.redhat.com/mailman/listinfo/dm-devel
> 
> References
> 
>    Visible links
>    1. mailto:bmarzins at redhat.com
>    2. mailto:bmarzins at redhat.com
>    3. mailto:bmarzins at redhat.com
>    4. mailto:tejaswinipoluri3 at gmail.com
>    5. mailto:bmarzins at redhat.com
>    6. mailto:tejaswinipoluri3 at gmail.com
>    7. mailto:bmarzins at redhat.com
>    8. mailto:dm-devel at redhat.com
>    9. https://www.redhat.com/mailman/listinfo/dm-devel
>   10. mailto:dm-devel at redhat.com
>   11. https://www.redhat.com/mailman/listinfo/dm-devel
>   12. mailto:tejaswinipoluri3 at gmail.com
>   13. mailto:bmarzins at redhat.com
>   14. mailto:dm-devel at redhat.com
>   15. https://www.redhat.com/mailman/listinfo/dm-devel
>   16. mailto:dm-devel at redhat.com
>   17. https://www.redhat.com/mailman/listinfo/dm-devel
>   18. mailto:tejaswinipoluri3 at gmail.com
>   19. mailto:bmarzins at redhat.com
>   20. mailto:tejaswinipoluri3 at gmail.com
>   21. mailto:bmarzins at redhat.com
>   22. mailto:dm-devel at redhat.com
>   23. https://www.redhat.com/mailman/listinfo/dm-devel
>   24. mailto:dm-devel at redhat.com
>   25. https://www.redhat.com/mailman/listinfo/dm-devel
>   26. mailto:tejaswinipoluri3 at gmail.com
>   27. mailto:bmarzins at redhat.com
>   28. mailto:dm-devel at redhat.com
>   29. https://www.redhat.com/mailman/listinfo/dm-devel
>   30. mailto:dm-devel at redhat.com
>   31. https://www.redhat.com/mailman/listinfo/dm-devel
>   32. mailto:bmarzins at redhat.com
>   33. mailto:tejaswinipoluri3 at gmail.com
>   34. mailto:bmarzins at redhat.com
>   35. mailto:tejaswinipoluri3 at gmail.com
>   36. mailto:bmarzins at redhat.com
>   37. mailto:dm-devel at redhat.com
>   38. https://www.redhat.com/mailman/listinfo/dm-devel
>   39. mailto:dm-devel at redhat.com
>   40. https://www.redhat.com/mailman/listinfo/dm-devel
>   41. mailto:tejaswinipoluri3 at gmail.com
>   42. mailto:bmarzins at redhat.com
>   43. mailto:dm-devel at redhat.com
>   44. https://www.redhat.com/mailman/listinfo/dm-devel
>   45. mailto:dm-devel at redhat.com
>   46. https://www.redhat.com/mailman/listinfo/dm-devel
>   47. mailto:tejaswinipoluri3 at gmail.com
>   48. mailto:bmarzins at redhat.com
>   49. mailto:tejaswinipoluri3 at gmail.com
>   50. mailto:bmarzins at redhat.com
>   51. mailto:dm-devel at redhat.com
>   52. https://www.redhat.com/mailman/listinfo/dm-devel
>   53. mailto:dm-devel at redhat.com
>   54. https://www.redhat.com/mailman/listinfo/dm-devel
>   55. mailto:tejaswinipoluri3 at gmail.com
>   56. mailto:bmarzins at redhat.com
>   57. mailto:dm-devel at redhat.com
>   58. https://www.redhat.com/mailman/listinfo/dm-devel
>   59. mailto:dm-devel at redhat.com
>   60. https://www.redhat.com/mailman/listinfo/dm-devel
>   61. mailto:bmarzins at redhat.com
>   62. mailto:bmarzins at redhat.com
>   63. mailto:tejaswinipoluri3 at gmail.com
>   64. mailto:bmarzins at redhat.com
>   65. mailto:tejaswinipoluri3 at gmail.com
>   66. mailto:bmarzins at redhat.com
>   67. mailto:dm-devel at redhat.com
>   68. https://www.redhat.com/mailman/listinfo/dm-devel
>   69. mailto:dm-devel at redhat.com
>   70. https://www.redhat.com/mailman/listinfo/dm-devel
>   71. mailto:tejaswinipoluri3 at gmail.com
>   72. mailto:bmarzins at redhat.com
>   73. mailto:dm-devel at redhat.com
>   74. https://www.redhat.com/mailman/listinfo/dm-devel
>   75. mailto:dm-devel at redhat.com
>   76. https://www.redhat.com/mailman/listinfo/dm-devel
>   77. mailto:tejaswinipoluri3 at gmail.com
>   78. mailto:bmarzins at redhat.com
>   79. mailto:tejaswinipoluri3 at gmail.com
>   80. mailto:bmarzins at redhat.com
>   81. mailto:dm-devel at redhat.com
>   82. https://www.redhat.com/mailman/listinfo/dm-devel
>   83. mailto:dm-devel at redhat.com
>   84. https://www.redhat.com/mailman/listinfo/dm-devel
>   85. mailto:tejaswinipoluri3 at gmail.com
>   86. mailto:bmarzins at redhat.com
>   87. mailto:dm-devel at redhat.com
>   88. https://www.redhat.com/mailman/listinfo/dm-devel
>   89. mailto:dm-devel at redhat.com
>   90. https://www.redhat.com/mailman/listinfo/dm-devel
>   91. mailto:bmarzins at redhat.com
>   92. mailto:tejaswinipoluri3 at gmail.com
>   93. mailto:bmarzins at redhat.com
>   94. mailto:tejaswinipoluri3 at gmail.com
>   95. mailto:bmarzins at redhat.com
>   96. mailto:dm-devel at redhat.com
>   97. https://www.redhat.com/mailman/listinfo/dm-devel
>   98. mailto:dm-devel at redhat.com
>   99. https://www.redhat.com/mailman/listinfo/dm-devel
>  100. mailto:tejaswinipoluri3 at gmail.com
>  101. mailto:bmarzins at redhat.com
>  102. mailto:dm-devel at redhat.com
>  103. https://www.redhat.com/mailman/listinfo/dm-devel
>  104. mailto:dm-devel at redhat.com
>  105. https://www.redhat.com/mailman/listinfo/dm-devel
>  106. mailto:tejaswinipoluri3 at gmail.com
>  107. mailto:bmarzins at redhat.com
>  108. mailto:tejaswinipoluri3 at gmail.com
>  109. mailto:bmarzins at redhat.com
>  110. mailto:dm-devel at redhat.com
>  111. https://www.redhat.com/mailman/listinfo/dm-devel
>  112. mailto:dm-devel at redhat.com
>  113. https://www.redhat.com/mailman/listinfo/dm-devel
>  114. mailto:tejaswinipoluri3 at gmail.com
>  115. mailto:bmarzins at redhat.com
>  116. mailto:dm-devel at redhat.com
>  117. https://www.redhat.com/mailman/listinfo/dm-devel
>  118. mailto:dm-devel at redhat.com
>  119. https://www.redhat.com/mailman/listinfo/dm-devel




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