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| author | Paul Duncan <pabs@pablotron.org> | 2021-10-14 12:47:50 -0400 |
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| committer | Paul Duncan <pabs@pablotron.org> | 2021-10-14 12:47:50 -0400 |
| commit | 4b6c0e31385f5f27a151088c0a2b614495c4e589 (patch) | |
| tree | 12243cdcd00704bc1a9d94ac9cc128459417370c /content/posts/2002-02-19-priority-inversion.html | |
| download | pablotron.org-4b6c0e31385f5f27a151088c0a2b614495c4e589.tar.bz2 pablotron.org-4b6c0e31385f5f27a151088c0a2b614495c4e589.zip | |
initial commit, including theme
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| -rw-r--r-- | content/posts/2002-02-19-priority-inversion.html | 21 |
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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> + |