From: "Alexander Beregalov" <a.beregalov@xxxxxxxxx> Date: Thu, 19 Jun 2008 20:02:44 +0400 > I have reverted this commit and > 2.6.26-rc6-00233-g99d3b2d works fine. It can boot. I know what the problem is. It's hanging because lockdep is starting to actually be used. :-) Beforehand various bugs caused lockdep to disable itself almost immediately. So it was never actually enabled on sparc64. When you revert that changeset, there is a loop in the backtrace of all kernel threads, and therefore lockdep turns itself off when all of the stack backtrace slots get consumed by that loop in the backtraces. After the revert you should see a set of kernel messages like: BUG: MAX_STACK_TRACE_ENTRIES too low! turning off the locking correctness validator. and that would confirm my theory. Lockdep really isn't usable on sparc64 at this time and it's one of the ongoing things I'm trying to get fully fixed. The changeset in question fixes a real bug in stack backtrace output, so it should stay in the tree. FWIW, I just verified the above on my ultra5 box. -- To unsubscribe from this list: send the line "unsubscribe kernel-testers" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
