On Tue, Mar 26, 2002 at 12:44:49PM -0800, Ashok Raj wrote:
> Hello.
>
> Has anyone tried applying the kdb patch and the lkcd patch? i would like to
> be able to use the kernel debugger, and the crash at the same time. i.e on
> panic i would like kdb to get control and have a command support to dump
> crash image if necessary.
I think we are experiencing a spinlock problem where kdb is stopping the
other CPU's and leaving a spinlock hung. I'll cc: you on the issue, if
anyone else is interested in the details let me know and I'll expand
the Cc: list.
I suspect the the kdb processing of:
kdb(KDB_REASON_PANIC, 0, NULL)
may need something added to make sure spinlocks aren't being held.
Perhaps we need to change kdb to behave more like:
kdb(KDB_REASON_KEYBOARD, 0, (kdb_eframe_t)regs);
when we are using dump and kdb together.
Could also be a bug in lkcd, but curently it's only hanging on
systems with kdb installed.
-piet
