Messages in this thread | | | Date | Tue, 12 Mar 2013 09:14:03 +0800 | Subject | Bug involving dynamic_debug and '-p' modifier | From | Andrew Cooks <> |
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Hi Jason
When I specify a '-p' modifier in the dynamic debug options in the kernel command line, I get a kernel panic during boot. The panic happens after userspace starts doing graphical stuff, but I haven't been able to pinpoint exactly what.
If I use '=_' instead of '-p', or boot to a recovery mode, or change the modifier after booting using debugfs, the panic doesn't occur. For example, booting to runlevel 3 with '=_', then flipping the same modifier to first to '+p' and then to '-p', before starting X does not result in a panic.
Booting to runlevel 3 (or even 1!), with '-p' results in a panic, but 'rdshell' is OK.
I also tried the Red Hat kernel (just because it's installed - I haven't figured out how to tell the package manager that I don't want a kernel). This also panics, but it says that '-p' is not supported.
Please let me know if you need me to do any other tests.
'-p', panic: http://pastebin.com/8yAcBQdY '-p', rdshell, no panic: http://pastebin.com/Hi2a7BZA
-- a.
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