Messages in this thread | | | Date | Tue, 12 Mar 2013 10:28:53 +0800 | Subject | Re: Bug involving dynamic_debug and '-p' modifier | From | Andrew Cooks <> |
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On Tue, Mar 12, 2013 at 9:14 AM, Andrew Cooks <acooks@gmail.com> wrote: > 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.
Jason's mail bounced, so redirecting to Jim Cromie, who made the most recent significant changes to dynamic_debug...
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