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    SubjectRe: [PATCH 22 of 23] IB/ipath - print warning if LID not acquired within one minute
    Quoting r. Robert Walsh <rjwalsh@pathscale.com>:
    > Subject: Re: [PATCH 22 of 23] IB/ipath - print warning if LID not acquired within one minute
    >
    > -----BEGIN PGP SIGNED MESSAGE-----
    > Hash: SHA1
    >
    > Roland Dreier wrote:
    > > 1) What makes ipath special so that we want this warning for ipath
    > > devices but not other IB hardware?
    >
    > There's nothing special about our hardware that requires this. We just
    > wanted that in there so we could direct customers to look at dmesg to
    > see if the warning popped up if they call with a problem. It is useful
    > to have for this purpose.
    >
    > > If this warning is actually
    > > useful, then I think it would make more sense to start a timer when
    > > any IB device is added, and warn if ports with a physical link don't
    > > become active after the timeout time.
    >
    > I'd be OK with doing that, too.

    Looks like your devices are all single-port. With a multi port
    device it is quite common to have one port down.

    > > But I'm having a hard time
    > > seeing why we want this message in the kernel log.
    >
    > It's useful when you're trying to track down problems.

    How about doing this in userspace by looking at port state in sysfs?
    You can diagnose a much wider class of problems this way.

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