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Date: Fri, 22 Aug 2008 21:54:03 +0100 From: "Daniel J Blueman" <daniel.blueman@...il.com> To: "Linux Kernel" <linux-kernel@...r.kernel.org> Subject: [2.6.27-rc4] MAX_LOCK_DEPTH too low... When running some kvm testing on 2.6.27-rc4 with various kernel debug options enabled, I hit the MAX_LOCK_DEPTH limit of 48: [ 30.670253] uhci_hcd 0000:00:1d.2: FGR not stopped yet! [ 30.701773] uhci_hcd 0000:00:1d.1: FGR not stopped yet! [ 30.733533] uhci_hcd 0000:00:1d.0: FGR not stopped yet! [ 30.765379] uhci_hcd 0000:00:1a.2: FGR not stopped yet! [ 30.797253] uhci_hcd 0000:00:1a.0: FGR not stopped yet! [ 115.469934] uhci_hcd 0000:00:1d.0: FGR not stopped yet! [ 184.507012] Hangcheck: hangcheck value past margin! [ 245.448004] BUG: MAX_LOCK_DEPTH too low! [ 245.448004] turning off the locking correctness validator. [ 260.937296] kvm: emulating exchange as write [ 364.507049] Hangcheck: hangcheck value past margin! [ 544.454998] Hangcheck: hangcheck value past margin! [ 724.507006] Hangcheck: hangcheck value past margin! Maybe the result of a particular path abusing a lock (ie a bug) even? Daniel -- Daniel J Blueman -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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