Salut and Suspend/Resume issues

[Kim Quirk]

It does feel like we should turn off suspend for some of our testing.
I've experienced similar problems.

Chris, do you recommend removing ohm? Or is there something else we should try?

Kim




On 2/19/08, Ricardo Carrano <carrano at ricardocarrano.com> wrote:
> I believe the most important issue here is that, the way it is now,
> suspend/resume will make a disconnected mesh unusable.
>
>
> On Feb 17, 2008 4:11 AM, Giannis Galanis <galanis at laptop.org> wrote:
>
> > There are a couple of important issues/bugs regarding Salut and
> > Suspend/Resume.
> >
> > FIRST, there is a "sugar issue", (or at least it seems so).
> > When an XO resumes after long suspends, all icons(APs, XOs, but not the
> > meshes) instantly vanish*(#6467)*. Then they slowly reappear. Although
> > with the APs the situation is pretty straightforward, with the XOs we have
> > several cases:
> >
> >    - all XOs in the mesh return almost instantly
> >    - all or some XOs return slowly one by one
> >    - nothing returns, and avahi peer list is empty*(#6498)*
> >
> > It seems that although suspend should keep the previous situation frozen,
> > in fact the avahi peer list is affected.
> >
> >
> > SECOND, we have a network issue, which suggests a "war" between
> > suspend/resume and avahi/salut
> > Suspend will be interrupted only with unicast packets, but Salut/avahi
> > rely on multicast packets.
> >
> > The result is that  when an XO that appears in the mesh view is suspended,
> > avahi will treat it just as if it has left the mesh.
> >
> >
> >    - When an XO is being used(not suspended), all other suspended XOs
> >    in the mesh will start failing 1 by 1
> >    - From the moment an XO is suspended in about 10-30min the icon will
> >    vanish.*(#6282)*
> >    - If within this time new XOs join the mesh than the icon will
> >    vanish instantly!!*(#5501)*
> >    - If gradually several removed XOs start to resume, their icons will
> >    start returning
> >
> > *****As you can see, the XOs have very little chance to even see each
> > other******
> >
> > RESULT:
> > A mesh of several XOs will avoid icons flashing here and there, ONLY if no
> > XO has been idle for more 10min, which is rather unlikely.
> >
> > Considering the effects of the FIRST issue, you would practically have to
> > restart sugar or switch channel back and forth to return to your original
> > status.
> >
> > Salut/avahi are very sluggish in handling failed connections, and suspend
> > resume enhaces this effect.
> >
> >
>

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