Comment 17 for bug 1349028

SRU Justification:

Impact:

The CONFIG_CONTEXT_TRACKING_FORCE should be disabled for
various reasons:

1. As described in the Kconfig "this option brings an
overhead that you don't want in production" and also
"Say Y only if you're working on the development of an
architecture backend for the context tracking."

Clearly for production kernel we should disable this.

2. Disabling this option also fixes bug LP:#1349028.

Testcase:

According to the getitimer() man page: "The element
it_value is set to the amount of time remaining on
the timer, or zero if the timer is disabled. Similarly,
it_interval is set to the reset value."

The following perl script should never exit:

    use Time::HiRes;
    $SIG{VTALRM} = sub { };
    Time::HiRes::setitimer(&Time::HiRes::ITIMER_VIRTUAL, 0.5, 0.4);
    while (1) {
        my @t = Time::HiRes::getitimer(&Time::HiRes::ITIMER_VIRTUAL);
        exit 0 if $t[0] == 0;
    }

With this config change the correct behaviour occurs.