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| author | sos22@douglas.cl.cam.ac.uk <sos22@douglas.cl.cam.ac.uk> | 2005-02-10 17:16:04 +0000 |
|---|---|---|
| committer | sos22@douglas.cl.cam.ac.uk <sos22@douglas.cl.cam.ac.uk> | 2005-02-10 17:16:04 +0000 |
| commit | 252678160f674ff6adda60e10e865f1193c3b64f (patch) | |
| tree | 2e7a67d0917ae2931e2e292598aace7884f1c3d1 /docs/misc/crashdb.txt | |
| parent | c4d681a4186247f24c941ba86a19ced71bf7c701 (diff) | |
| download | xen-252678160f674ff6adda60e10e865f1193c3b64f.tar.gz xen-252678160f674ff6adda60e10e865f1193c3b64f.tar.bz2 xen-252678160f674ff6adda60e10e865f1193c3b64f.zip | |
bitkeeper revision 1.1169 (420b96d48xPe7Ok5mXEY_QuvSxXLxw)
Improve documentation a little.
Diffstat (limited to 'docs/misc/crashdb.txt')
| -rw-r--r-- | docs/misc/crashdb.txt | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/docs/misc/crashdb.txt b/docs/misc/crashdb.txt index ebf5e9f9b9..a366f72f5d 100644 --- a/docs/misc/crashdb.txt +++ b/docs/misc/crashdb.txt @@ -34,3 +34,17 @@ and I'm not terribly interested in putting it back. As soon as you reach the debugger, we disable interrupts, the watchdog, and every other CPU, so the state of the world shouldn't change too much behind your back. + + +Reasons why we might fail to reach the debugger: +----------------------------------------------- + +-- In order to stop the other processors, we need to acquire the SMP + call lock. If you happen to have crashed in the middle of that, + you're screwed. +-- If the page tables are wrong, you're screwed +-- If the serial port setup is wrong, badness happens +-- We acquire the console lock at one stage XXX this is unnecessary and + stupid +-- Obviously, the low level processor state can be screwed in any + number of wonderful ways |