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Date:	Fri, 14 Mar 2014 21:02:56 +0000
From:	"Moore, Robert" <robert.moore@...el.com>
To:	Valdis Kletnieks <Valdis.Kletnieks@...edu>,
	"Zheng, Lv" <lv.zheng@...el.com>,
	"Wysocki, Rafael J" <rafael.j.wysocki@...el.com>,
	"Len Brown" <lenb@...nel.org>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org>
Subject: RE: ACPICA 20140214 auto-serialize weirds my machine...



> -----Original Message-----
> From: Valdis Kletnieks [mailto:Valdis.Kletnieks@...edu]
> Sent: Friday, March 14, 2014 9:05 AM
> To: Zheng, Lv; Wysocki, Rafael J; Moore, Robert; Len Brown
> Cc: linux-kernel@...r.kernel.org; linux-acpi@...r.kernel.org
> Subject: ACPICA 20140214 auto-serialize weirds my machine...
> 
> Surprisingly enough, this hasn't seemed to have bitten many Linux people
> yet, Google only finds a BSD thread (where the same ACPICA code is in
> use):


Yes, and the reason that it is rare to see this error is because the problem is related to the use of the ASL Sync Level mechanism, which is rarely used.

Bob





> 
> http://comments.gmane.org/gmane.os.dragonfly-bsd.user/1817
> 
> I found this, but haven't tried it yet:
> 
> commit 5f1cb4a92e4c4aabd139ff9ca1e11c0e2db2ac59
> Author: Lv Zheng <lv.zheng@...el.com>
> Date:   Wed Feb 26 10:32:01 2014 +0800
> 
>     ACPICA: Remove global option to serialize all control methods.
> 
>     With the addition of the auto-serialization feature, this option
>     is obsolete and is completely removed. Lv Zheng.
> 
>     This patch also updates acpi_serialize kernel parameter using the
>     new auto-serialization feature - acpi_gbl_auto_serialize_methods.
> 
> This looks like a user nightmare waiting to happen, because:
> 
> -   	acpi_serialize	[HW,ACPI] force serialization of AML methods
> +	acpi_serialize=	[HW,ACPI] configure auto-serialization of AML
> methods
> 
> Re-using a kernel parameter name with different semantics is just asking
> for trouble.
> 
> I get this in my dmesg, and then I end up with all sorts of ACPI-related
> weirdness - everything from 4 or 5 temperature sensors evaporating to it
> claiming that my laptop doesn't have a battery bay (it may also be related
> to an issue I'm seeing with multiple graphics monitors as well, but I
> haven't verified that yet).
> 
> We're going to need a better way to deal with this before it gets to
> mainline....
> 
> [    0.119344] ACPI: Executed 1 blocks of module-level executable AML code
> [    0.135282] ACPI Error: Cannot acquire Mutex for method [SNVC], current
> SyncLevel is too large (1) (20140214/dsmethod-362)
> [    0.135288] ACPI Error: Method parse/execution failed [\SMBF] (Node
> ffff88012d026ec0), AE_AML_MUTEX_ORDER (20140214/psparse-536)
> [    0.135298] ACPI Error: Method parse/execution failed [\GENS] (Node
> ffff88012d026e70), AE_AML_MUTEX_ORDER (20140214/psparse-536)
> [    0.135307] ACPI Error: Method parse/execution failed [\EISC] (Node
> ffff88012d02d560), AE_AML_MUTEX_ORDER (20140214/psparse-536)
> [    0.135320] ACPI Error: Method parse/execution failed
> [\_SB_.PCI0.LPCB.ECDV.ECR1] (Node ffff88012d02d470), AE_AML_MUTEX_ORDER
> (20140214/psparse-536)
> [    0.135328] ACPI Error: Method parse/execution failed [\ECRB] (Node
> ffff88012d02d5d8), AE_AML_MUTEX_ORDER (20140214/psparse-536)
> [    0.135336] ACPI Error: Method parse/execution failed [\ECG5] (Node
> ffff88012d02d740), AE_AML_MUTEX_ORDER (20140214/psparse-536)
> [    0.135343] ACPI Error: Method parse/execution failed
> [\_SB_.PCI0.LPCB.EINI] (Node ffff88012d02db00), AE_AML_MUTEX_ORDER
> (20140214/psparse-536)
> [    0.135351] ACPI Error: Method parse/execution failed [\EV3_] (Node
> ffff88012d0314c0), AE_AML_MUTEX_ORDER (20140214/psparse-536)
> [    0.135359] ACPI Error: Method parse/execution failed [\_SB_.PCI0._INI]
> (Node ffff88012d026920), AE_AML_MUTEX_ORDER (20140214/psparse-536)
> [    0.135574] [Firmware Bug]: ACPI: BIOS _OSI(Linux) query ignored
> [    0.136283] ACPI: SSDT 0x00000000CE789598 000523 (v01 PmRef  Cpu0Cst
> 00003001 INTL 20051117)
> [    0.138312] ACPI: Dynamic OEM Table Load:
> [    0.138316] ACPI: SSDT 0x0000000000000000 000523 (v01 PmRef  Cpu0Cst
> 00003001 INTL 20051117)
> [    0.141483] ACPI: SSDT 0x00000000CE78AA98 000303 (v01 PmRef  ApIst
> 00003000 INTL 20051117)
> [    0.143683] ACPI: Dynamic OEM Table Load:
> [    0.143687] ACPI: SSDT 0x0000000000000000 000303 (v01 PmRef  ApIst
> 00003000 INTL 20051117)
> [    0.146215] ACPI: SSDT 0x00000000CE790C18 000119 (v01 PmRef  ApCst
> 00003000 INTL 20051117)
> [    0.148279] ACPI: Dynamic OEM Table Load:
> [    0.148282] ACPI: SSDT 0x0000000000000000 000119 (v01 PmRef  ApCst
> 00003000 INTL 20051117)
> [    0.152678] ACPI Error: Cannot acquire Mutex for method [SNVC], current
> SyncLevel is too large (1) (20140214/dsmethod-362)
> [    0.152684] ACPI Error: Method parse/execution failed [\SMBF] (Node
> ffff88012d026ec0), AE_AML_MUTEX_ORDER (20140214/psparse-536)
> [    0.152693] ACPI Error: Method parse/execution failed [\GENS] (Node
> ffff88012d026e70), AE_AML_MUTEX_ORDER (20140214/psparse-536)
> [    0.152702] ACPI Error: Method parse/execution failed [\EISC] (Node
> ffff88012d02d560), AE_AML_MUTEX_ORDER (20140214/psparse-536)
> [    0.152714] ACPI Error: Method parse/execution failed
> [\_SB_.PCI0.LPCB.ECDV.ECR1] (Node ffff88012d02d470), AE_AML_MUTEX_ORDER
> (20140214/psparse-536)
> [    0.152722] ACPI Error: Method parse/execution failed [\ECBT] (Node
> ffff88012d02d588), AE_AML_MUTEX_ORDER (20140214/psparse-536)
> [    0.152730] ACPI Error: Method parse/execution failed [\ECG3] (Node
> ffff88012d02d6c8), AE_AML_MUTEX_ORDER (20140214/psparse-536)
> [    0.152737] ACPI Error: Method parse/execution failed
> [\_SB_.PCI0.LPCB.ECDV.ECIN] (Node ffff88012d02d3d0), AE_AML_MUTEX_ORDER
> (20140214/psparse-536)
> [    0.152745] ACPI Error: Method parse/execution failed
> [\_SB_.PCI0.LPCB.ECDV._REG] (Node ffff88012d02d3f8), AE_AML_MUTEX_ORDER
> (20140214/psparse-536)
> [    0.152818] ACPI: Interpreter enabled
> [    0.152828] ACPI: (supports S0)
> [    0.152830] ACPI: Using IOAPIC for interrupt routing
> [    0.152883] PCI: Using host bridge windows from ACPI; if necessary, use
> "pci=nocrs" and report a bug
> [    0.156479] ACPI Error: Cannot acquire Mutex for method [SNVC], current
> SyncLevel is too large (1) (20140214/dsmethod-362)
> [    0.156485] ACPI Error: Method parse/execution failed [\SMBF] (Node
> ffff88012d026ec0), AE_AML_MUTEX_ORDER (20140214/psparse-536)
> [    0.156494] ACPI Error: Method parse/execution failed [\GENS] (Node
> ffff88012d026e70), AE_AML_MUTEX_ORDER (20140214/psparse-536)
> [    0.156504] ACPI Error: Method parse/execution failed
> [\_SB_.PCI0.LPCB.UAR1._STA] (Node ffff88012d02fb28), AE_AML_MUTEX_ORDER
> (20140214/psparse-536)
> [    0.156666] ACPI Error: Cannot acquire Mutex for method [SNVC], current
> SyncLevel is too large (1) (20140214/dsmethod-362)
> [    0.156671] ACPI Error: Method parse/execution failed [\SMBF] (Node
> ffff88012d026ec0), AE_AML_MUTEX_ORDER (20140214/psparse-536)
> [    0.156680] ACPI Error: Method parse/execution failed [\GENS] (Node
> ffff88012d026e70), AE_AML_MUTEX_ORDER (20140214/psparse-536)
> [    0.156689] ACPI Error: Method parse/execution failed
> [\_SB_.PCI0.LPCB.LPTE.CLPS] (Node ffff88012d02fcb8), AE_AML_MUTEX_ORDER
> (20140214/psparse-536)
> [    0.156702] ACPI Error: Method parse/execution failed
> [\_SB_.PCI0.LPCB.LPTE._STA] (Node ffff88012d02fce0), AE_AML_MUTEX_ORDER
> (20140214/psparse-536)
> [    0.162229] ACPI Error: Cannot acquire Mutex for method [SNVC], current
> SyncLevel is too large (1) (20140214/dsmethod-362)
> [    0.162234] ACPI Error: Method parse/execution failed [\SMBF] (Node
> ffff88012d026ec0), AE_AML_MUTEX_ORDER (20140214/psparse-536)
> [    0.162244] ACPI Error: Method parse/execution failed [\GENS] (Node
> ffff88012d026e70), AE_AML_MUTEX_ORDER (20140214/psparse-536)
> [    0.162254] ACPI Error: Method parse/execution failed [\EISC] (Node
> ffff88012d02d560), AE_AML_MUTEX_ORDER (20140214/psparse-536)
> 
> (you get the idea.  I get a total of 172 'ACPI Error:' messages before I
> get to a single-user prompt)
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