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Date: Fri, 04 May 2007 17:06:07 +0100
Message-ID: <86k5vozi8g.wl%rpaulo@fnop.net>
From: Rui Paulo <rpaulo@fnop.net>
To: John Baldwin <jhb@FreeBSD.org>, Pyun YongHyeon <pyunyh@gmail.com>
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Cc: cvs-src@FreeBSD.org, src-committers@FreeBSD.org, cvs-all@FreeBSD.org
Subject: Re: cvs commit: src/sys/amd64/amd64 mptable_pci.c msi.c
	nexus.c	src/sys/amd64/include intr_machdep.h
	src/sys/amd64/pci	pci_bus.c src/sys/dev/acpica
	acpi_pcib_acpi.c acpi_pcib_pci.c	src/sys/dev/pci pci.c
	pci_if.m pci_pci.c pci_private.h pcib_if.m ...
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At Fri, 04 May 2007 16:49:35 +0100,
Rui Paulo wrote:
> With this change, I think, I get a WITNESS panic when booting the
> second core on my MacBook
> 
> After SMP: AP #1 Launched, I get this panic:
> panic: blockable sleep lock (sx) msi @ i386/i386/msi.c:374
> 
> The backtrace is:
> witness_checkorder()
> _sx_lock()
> msi_map()
> nexus_map_msi()
> acpi_pcib_map_msi()
> pcib_map_msi()
> pci_remap_msi_irq()
> msi_assign_cpu()

BTW the source of the problem is related to msk(4).
If I disable MSI only on the msk device (via hw.msk.msi_disable=1
tunable), everything works fine.