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Message-ID: <4911F71203A09E4D9981D27F9D8308580DBD34C2@orsmsx503.amr.corp.intel.com>
Date:	Wed, 26 Nov 2008 08:24:26 -0800
From:	"Moore, Robert" <robert.moore@...el.com>
To:	"Valdis.Kletnieks@...edu" <Valdis.Kletnieks@...edu>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: 2.6.28-rc6-mmotm1126 - acpi AE_AM_INFINITE_LOOP errors..


You could try making the max loop count larger, it is a 32-bit value:

acconfig.h

/* Maximum number of While() loop iterations before forced abort */

-#define ACPI_MAX_LOOP_ITERATIONS        0xFFFF
+#define ACPI_MAX_LOOP_ITERATIONS        0x00FFFFFF

>-----Original Message-----
>From: Valdis.Kletnieks@...edu [mailto:Valdis.Kletnieks@...edu]
>Sent: Wednesday, November 26, 2008 8:16 AM
>To: Andrew Morton; Moore, Robert
>Cc: linux-kernel@...r.kernel.org
>Subject: 2.6.28-rc6-mmotm1126 - acpi AE_AM_INFINITE_LOOP errors..
>
>I wasn't seeing these in -rc5-1117.
>Am suspecting this commit or related:
>
>commit 9c8573ca6e35f327d53cb46aba017b95e05d8e08
>Author: Bob Moore <robert.moore@...el.com>
>Date:   Wed Nov 12 15:15:29 2008 +0800
>
>    ACPICA: Add a mechanism to escape infinite AML While() loops
>
>    Add a loop counter to force exit from AML While loops if the
>    count becomes too large. This can occur in poorly written AML
>    when the hardware does not respond within a while loop and the
>    loop does not implement a timeout. The maximum loop count is
>    configurable. A new exception code is returned when a loop is
>    broken, AE_AML_INFINITE_LOOP.  Bob Moore, Alexey Starikovskiy.
>
>    Signed-off-by: Bob Moore <robert.moore@...el.com>
>    Signed-off-by: Lin Ming <ming.m.lin@...el.com>
>    Signed-off-by: Len Brown <len.brown@...el.com>
>
>This is a Dell Latitude D820, and didn't seem to have any infinite AML
>loops to escape, at least none that I actually hit with previous kernels...
>
>[   14.500963] usb 3-1.2: new full speed USB device using uhci_hcd and
>address 3
>[   14.508930] ACPI Error (psparse-0536): Method parse/execution failed
>[\SXX6] (Node ffff88007f851a98), AE_AML_INFINITE_LOOP
>[   14.508973] ACPI Error (psparse-0536): Method parse/execution failed
>[\SXX4] (Node ffff88007f851a58), AE_AML_INFINITE_LOOP
>[   14.509001] ACPI Error (psparse-0536): Method parse/execution failed
>[\SX11] (Node ffff88007f8519f8), AE_AML_INFINITE_LOOP
>[   14.509029] ACPI Error (psparse-0536): Method parse/execution failed
>[\_TZ_.THM_.GINF] (Node ffff88007f858858), AE_AML_INFINITE_LOOP
>[   14.509058] ACPI Error (psparse-0536): Method parse/execution failed
>[\_TZ_.THM_._TMP] (Node ffff88007f858878), AE_AML_INFINITE_LOOP
>..
>[   14.749476] usb 3-1.2: configuration #1 chosen from 1 choice
>[   15.589404] ACPI Error (psparse-0536): Method parse/execution failed
>[\SMI_] (Node ffff88007f851238), AE_AML_INFINITE_LOOP
>[   15.603541] ACPI Error (psparse-0536): Method parse/execution failed
>[\_SB_.LID_._LID] (Node ffff88007f8581f8), AE_AML_INFINITE_LOOP
>[   15.617394] ACPI: Lid Switch [LID]
>[   15.632375] input: Power Button (CM) as
>/devices/LNXSYSTM:00/device:00/PNP0C0C:00/input/input6
>[   15.687289] ACPI: Power Button (CM) [PBTN]
>[   15.702897] input: Sleep Button (CM) as
>/devices/LNXSYSTM:00/device:00/PNP0C0E:00/input/input7
>[   15.737284] ACPI: Sleep Button (CM) [SBTN]
>[   16.624380] ACPI Error (psparse-0536): Method parse/execution failed
>[\SMI_] (Node ffff88007f851238), AE_AML_INFINITE_LOOP
>[   16.638972] ACPI Error (psparse-0536): Method parse/execution failed
>[\_SB_.PCI0.AGP_.VID_._DOD] (Node ffff88007f85ded8), AE_AML_INFINITE_LOOP
>[   16.654039] ACPI Exception (video-1638): AE_AML_INFINITE_LOOP,
>Evaluating _DOD [20080926]
>[   17.669507] ACPI Error (psparse-0536): Method parse/execution failed
>[\SMI_] (Node ffff88007f851238), AE_AML_INFINITE_LOOP
>[   17.685120] ACPI Error (psparse-0536): Method parse/execution failed
>[\_SB_.PCI0.AGP_.VID_.LCD_._ADR] (Node ffff88007f85dd58),
>AE_AML_INFINITE_LOOP
>[   17.701051] ACPI: Cant attach deviceACPI Error (psparse-0536): Method
>parse/execution failed [\SMI_] (Node ffff88007f851238),
>AE_AML_INFINITE_LOOP
>[   18.719111] ACPI Error (psparse-0536): Method parse/execution failed
>[\_SB_.PCI0.AGP_.VID_.DVI_._ADR] (Node ffff88007f85dcb8),
>AE_AML_INFINITE_LOOP
>[   18.735778] ACPI: Cant attach deviceACPI Error (psparse-0536): Method
>parse/execution failed [\SMI_] (Node ffff88007f851238),
>AE_AML_INFINITE_LOOP
>[   19.745706] ACPI Error (psparse-0536): Method parse/execution failed
>[\_SB_.PCI0.AGP_.VID_._DOS] (Node ffff88007f85def8), AE_AML_INFINITE_LOOP
>[   19.763195] input: Video Bus as
>/devices/LNXSYSTM:00/device:00/PNP0A03:00/device:22/device:23/input/input8
>[   19.784055] ACPI: Video Device [VID] (multi-head: yes  rom: no  post:
>no)
>[   19.893914] tpm_tis 00:0f: 1.2 TPM (device-id 0x1001, rev-id 2)
>[   20.044222] Real Time Clock Driver v1.12b
>[   23.722937] ACPI Error (psparse-0536): Method parse/execution failed
>[\SMI_] (Node ffff88007f851238), AE_AML_INFINITE_LOOP
>[   23.741371] ACPI Error (psparse-0536): Method parse/execution failed
>[\_SB_.AC__._PSR] (Node ffff88007f8584b8), AE_AML_INFINITE_LOOP
>[   23.759881] ACPI Exception (ac-0135): AE_AML_INFINITE_LOOP, Error
>reading AC Adapter state [20080926]
>[   25.138613] ACPI Error (psparse-0536): Method parse/execution failed
>[\SMI_] (Node ffff88007f851238), AE_AML_INFINITE_LOOP
>[   25.157545] ACPI Error (psparse-0536): Method parse/execution failed
>[\_SB_.AC__._PSR] (Node ffff88007f8584b8), AE_AML_INFINITE_LOOP
>[   25.176898] ACPI Exception (ac-0135): AE_AML_INFINITE_LOOP, Error
>reading AC Adapter state [20080926]
>[   26.447172] ACPI Error (psparse-0536): Method parse/execution failed
>[\SMI_] (Node ffff88007f851238), AE_AML_INFINITE_LOOP
>[   26.467212] ACPI Error (psparse-0536): Method parse/execution failed
>[\_SB_.AC__._PSR] (Node ffff88007f8584b8), AE_AML_INFINITE_LOOP
>[   26.487528] ACPI Exception (ac-0135): AE_AML_INFINITE_LOOP, Error
>reading AC Adapter state [20080926]
>[   27.684304] ACPI Error (psparse-0536): Method parse/execution failed
>[\SMI_] (Node ffff88007f851238), AE_AML_INFINITE_LOOP
>[   27.704947] ACPI Error (psparse-0536): Method parse/execution failed
>[\_SB_.AC__._PSR] (Node ffff88007f8584b8), AE_AML_INFINITE_LOOP
>[   27.725906] ACPI Exception (ac-0135): AE_AML_INFINITE_LOOP, Error
>reading AC Adapter state [20080926]
>[   28.907380] ACPI Error (psparse-0536): Method parse/execution failed
>[\SMI_] (Node ffff88007f851238), AE_AML_INFINITE_LOOP
>[   28.928958] ACPI Error (psparse-0536): Method parse/execution failed
>[\_SB_.AC__._PSR] (Node ffff88007f8584b8), AE_AML_INFINITE_LOOP
>[   28.950703] ACPI Exception (ac-0135): AE_AML_INFINITE_LOOP, Error
>reading AC Adapter state [20080926]
>[   30.485112] ACPI Error (psparse-0536): Method parse/execution failed
>[\SMI_] (Node ffff88007f851238), AE_AML_INFINITE_LOOP
>[   30.507460] ACPI Error (psparse-0536): Method parse/execution failed
>[\_SB_.AC__._PSR] (Node ffff88007f8584b8), AE_AML_INFINITE_LOOP
>[   30.530100] ACPI Exception (ac-0135): AE_AML_INFINITE_LOOP, Error
>reading AC Adapter state [20080926]
>[   30.507460] ACPI Error (psparse-0536): Method parse/execution failed
>[\_SB_.AC__._PSR] (Node ffff88007f8584b8), AE_AML_INFINITE_LOOP
>[   30.530100] ACPI Exception (ac-0135): AE_AML_INFINITE_LOOP, Error
>reading AC Adapter state [20080926]
>[   30.701061] Clocksource tsc unstable (delta = -6082993826 ns)
>[   32.770589] ACPI Error (psparse-0536): Method parse/execution failed
>[\SMI_] (Node ffff88007f851238), AE_AML_INFINITE_LOOP
>[   32.793800] ACPI Error (psparse-0536): Method parse/execution failed
>[\_SB_.AC__._PSR] (Node ffff88007f8584b8), AE_AML_INFINITE_LOOP
>[   32.817635] ACPI Exception (ac-0135): AE_AML_INFINITE_LOOP, Error
>reading AC Adapter state [20080926]
>[   33.984725] ACPI Error (psparse-0536): Method parse/execution failed
>[\SMI_] (Node ffff88007f851238), AE_AML_INFINITE_LOOP
>[   34.008812] ACPI Error (psparse-0536): Method parse/execution failed
>[\_SB_.AC__._PSR] (Node ffff88007f8584b8), AE_AML_INFINITE_LOOP
>[   34.033236] ACPI Exception (ac-0135): AE_AML_INFINITE_LOOP, Error
>reading AC Adapter state [20080926]
>[   35.550289] ACPI Error (psparse-0536): Method parse/execution failed
>[\SMI_] (Node ffff88007f851238), AE_AML_INFINITE_LOOP
>[   35.574761] ACPI Error (psparse-0536): Method parse/execution failed
>[\_SB_.AC__._PSR] (Node ffff88007f8584b8), AE_AML_INFINITE_LOOP
>[   35.599301] ACPI Exception (ac-0135): AE_AML_INFINITE_LOOP, Error
>reading AC Adapter state [20080926]
>[   36.985099] ACPI Error (psparse-0536): Method parse/execution failed
>[\SMI_] (Node ffff88007f851238), AE_AML_INFINITE_LOOP
>[   37.009318] ACPI Error (psparse-0536): Method parse/execution failed
>[\_SB_.AC__._PSR] (Node ffff88007f8584b8), AE_AML_INFINITE_LOOP
>[   37.034035] ACPI Exception (ac-0135): AE_AML_INFINITE_LOOP, Error
>reading AC Adapter state [20080926]
>[   38.169534] ACPI Error (psparse-0536): Method parse/execution failed
>[\SMI_] (Node ffff88007f851238), AE_AML_INFINITE_LOOP
>[   38.193902] ACPI Error (psparse-0536): Method parse/execution failed
>[\_SB_.AC__._PSR] (Node ffff88007f8584b8), AE_AML_INFINITE_LOOP
>[   38.218599] ACPI Exception (ac-0135): AE_AML_INFINITE_LOOP, Error
>reading AC Adapter state [20080926]
>[   38.323556] EXT3 FS on dm-0, internal journal

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