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diff --git a/content/posts/2002-02-19-priority-inversion.html b/content/posts/2002-02-19-priority-inversion.html new file mode 100644 index 0000000..fa8a811 --- /dev/null +++ b/content/posts/2002-02-19-priority-inversion.html @@ -0,0 +1,21 @@ +--- +date: "2002-02-19T15:36:26Z" +title: Priority Inversion +--- + +<p> +An amusing example of a lack of proper priority inversion handling from the LKML: +</p> + +<p> +<i> +One mainframe at MIT +was decomissioned in the early 70's and they found a "run only when idle" +task that had been started around seven years earlier and still hadn't gotten +any time slices because the server had never been completely idle. (The +pathfinder mars probe kept rebooting for a similar reason: a vital system +task was getting starved while it held a semaphore that other stuff needed, +and not scheduling before timeouts caused a reboot. +</i> +</p> + |