mirror of
https://github.com/xen-project/xen.git
synced 2026-10-28 02:01:24 +01:00
Juergen Gross
7a02176b13
When the host crashes it would sometimes be nice to have additional debug data available which could be produced via debug keys, but halting the server for manual intervention might be impossible due to the need to reboot/kexec rather sooner than later. Add support for automatic debug key actions in case of crashes which can be activated via boot- or runtime-parameter. Depending on the type of crash the desired data might be different, so support different settings for the possible types of crashes. The parameter is "crash-debug" with the following syntax: crash-debug-<type>=<string> with <type> being one of: panic, hwdom, watchdog, kexeccmd, debugkey and <string> a sequence of debug key characters with '+' having the special semantics of a 10 millisecond pause. So "crash-debug-watchdog=0+0qr" would result in special output in case of watchdog triggered crash (dom0 state, 10 ms pause, dom0 state, domain info, run queues). Don't call key handlers in early boot, as some (e.g. for 'd') require some initializations to be finished, like scheduler or idle domain. Signed-off-by: Juergen Gross <jgross@suse.com> Reviewed-by: Jan Beulich <jbeulich@suse.com>
Sphinx documentation:
All source rendered by Sphinx is licensed under CC-BY-4.0.
You are free to:
Share:
Copy and redistribute the material in any medium or format.
Adapt:
Remix, transform, and build upon the material for any purpose, even
commercially.
Under the following terms:
Attribution:
You must give appropriate credit, provide a link to the license, and
indicate if changes were made. You may do so in any reasonable manner, but
not in any way that suggests the licensor endorses you or your use.
No additional restrictions:
You may not apply legal terms or technological measures that legally
restrict others from doing anything the license permits.
See https://creativecommons.org/licenses/by/4.0/ for full details.
This includes:
* All ReStructured Text files: docs/*/*.rst
* The Sphinx configuration file: docs/conf.py
* Content in Sphinx-exclusive subdirs: docs/*-guide/*
Other documentation:
There are a variety of text documents in various formats. These, given no
explicit license guidance, fall under Xen's default GPL-2.0 license.