Messages in this thread | | | Date | Mon, 04 Aug 2008 14:57:13 -0700 (PDT) | Subject | Re: [PATCH] workaround minor lockdep bug triggered by mm_take_all_locks | From | David Miller <> |
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From: Andrea Arcangeli <andrea@qumranet.com> Date: Mon, 4 Aug 2008 23:09:54 +0200
> On Mon, Aug 04, 2008 at 10:37:22PM +0200, Peter Zijlstra wrote: > > You're so wrong it not even funny. It reports about deadlocks before > > they happen. All it needs is to observe a lock order violation and it > > Now tell me how it helps to report them... It tells me the system has > crashed and where, it's not like I couldn't figure it out by myself > but just noticing nothing works and all cpus are spinning in some > spinlock slow path and pressing sysrq+t/p.
It tells you about deadlock scenerios that you haven't even encoutered yet. It shows bugs for parallel code path sequences that have not even occurred yet.
But I think you're beyond the point of being able to see why lockdep is valuable. So why don't we just move on.
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