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Re: 2.6.24-rc8 hangs at mfgpt-timer

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From: Jordan Crouse <jordan.crouse@...>
To: Arnd Hannemann <hannemann@...>
Cc: Andres Salomon <dilinger@...>, Linux Kernel Mailing List <linux-kernel@...>
Subject: Re: 2.6.24-rc8 hangs at mfgpt-timer
Date: Monday, January 21, 2008 - 7:27 pm

Okay - I've been exploring a little bit more.  I talked to the TinyBIOS
developer, and he verified that TinyBIOS shouldn't use any MFGPT timers.
He also told me that the mysterious "MFGPT workaround" was in fact the 
magic MFGPT erasing MSR that was in the old kernel driver.

So with the "MFGPT workaround" turned off, TinyBIOS should be acting like
the OLPC firmware with regards to timers, yet it is not.  So that is 
curious.  I think I might have identified a race condition in the code,
but I'm not 100% sure thats the same problem that the ALIX platform is
seeing.

Anrd and others - will you please try the attached patch on your platform
with the "MFGPT workaround" turned off and mfgpts enabled, and send out
the dmesg?

This will give us some debug information that I can use to ensure that
the interrupts are set up correctly.  You can leave the timer tick disabled
if you want.

Thanks,
Jordan

-- 
Jordan Crouse
Systems Software Development Engineer 
Advanced Micro Devices, Inc.
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Messages in current thread:
2.6.24-rc8 hangs at mfgpt-timer, Arnd Hannemann, (Wed Jan 16, 1:44 pm)
Re: 2.6.24-rc8 hangs at mfgpt-timer, Andres Salomon, (Wed Jan 16, 5:19 pm)
Re: 2.6.24-rc8 hangs at mfgpt-timer, Andres Salomon, (Wed Jan 16, 5:56 pm)
Re: 2.6.24-rc8 hangs at mfgpt-timer, Arnd Hannemann, (Thu Jan 17, 5:54 am)
Re: 2.6.24-rc8 hangs at mfgpt-timer, Andres Salomon, (Thu Jan 17, 2:40 pm)
Re: 2.6.24-rc8 hangs at mfgpt-timer, Arnd Hannemann, (Thu Jan 17, 3:53 pm)
Re: 2.6.24-rc8 hangs at mfgpt-timer, Jordan Crouse, (Thu Jan 17, 5:19 pm)
Re: 2.6.24-rc8 hangs at mfgpt-timer, Arnd Hannemann, (Thu Jan 17, 5:50 pm)
Re: 2.6.24-rc8 hangs at mfgpt-timer, Jordan Crouse, (Thu Jan 17, 6:36 pm)
Re: 2.6.24-rc8 hangs at mfgpt-timer, Arnd Hannemann, (Thu Jan 17, 6:52 pm)
[GEODE] Geode GX/LX watchdog timer (was 2.6.24-rc8 hangs at ..., Jordan Crouse, (Fri Jan 18, 9:06 pm)
Re: [GEODE] Geode GX/LX watchdog timer (was 2.6.24-rc8 hangs..., Lennart Sorensen, (Sun Jan 20, 4:16 pm)
Re: [GEODE] Geode GX/LX watchdog timer (was 2.6.24-rc8 hangs..., Arnd Hannemann, (Sun Jan 20, 9:22 am)
Re: Geode GX/LX watchdog timer (RESEND), Jordan Crouse, (Mon Jan 21, 1:07 pm)
Re: Geode GX/LX watchdog timer (RESEND), Arnd Hannemann, (Mon Jan 21, 2:37 pm)
Re: Geode GX/LX watchdog timer (RESEND), Iain Paton, (Sun Feb 17, 10:14 am)
Re: Geode GX/LX watchdog timer (RESEND), Arnd Hannemann, (Sun Feb 17, 10:46 am)
Re: Geode GX/LX watchdog timer (RESEND), Adrian Bunk, (Sun Feb 17, 10:54 am)
Re: Geode GX/LX watchdog timer (RESEND), Iain Paton, (Sun Feb 17, 12:10 pm)
Re: Geode GX/LX watchdog timer (RESEND), Arnd Hannemann, (Sun Feb 17, 3:46 pm)
Re: Geode GX/LX watchdog timer (RESEND), Andres Salomon, (Sun Feb 17, 1:32 pm)
Re: Geode GX/LX watchdog timer (was 2.6.24-rc8 hangs at mfgp..., Jordan Crouse, (Sun Jan 20, 12:34 pm)
Re: [GEODE] Geode GX/LX watchdog timer (was 2.6.24-rc8 hangs..., Willy Tarreau, (Sat Jan 19, 2:36 am)
Re: 2.6.24-rc8 hangs at mfgpt-timer, Jordan Crouse, (Thu Jan 17, 6:57 pm)
Re: 2.6.24-rc8 hangs at mfgpt-timer, Arnd Hannemann, (Thu Jan 17, 7:39 pm)
Re: 2.6.24-rc8 hangs at mfgpt-timer, Jordan Crouse, (Mon Jan 21, 7:27 pm)
Re: 2.6.24-rc8 hangs at mfgpt-timer, Arnd Hannemann, (Tue Jan 22, 5:03 am)
Re: 2.6.24-rc8 hangs at mfgpt-timer, Lars Heete, (Tue Jan 22, 6:11 am)
Re: 2.6.24-rc8 hangs at mfgpt-timer, Arnd Hannemann, (Tue Jan 22, 7:18 am)
Re: 2.6.24-rc8 hangs at mfgpt-timer, Jordan Crouse, (Tue Jan 22, 3:27 pm)
Re: 2.6.24-rc8 hangs at mfgpt-timer, Arnd Hannemann, (Tue Jan 22, 4:54 pm)
Re: 2.6.24-rc8 hangs at mfgpt-timer, Ingo Molnar, (Tue Jan 22, 5:10 pm)
[PATCH 0/2] Was: 2.6.24-rc8 hangs at mfgpt-timer, Willy Tarreau, (Wed Jan 23, 5:17 pm)
[PATCH 2/2] x86: GEODE add the "mfgptfix" boot time option t..., Willy Tarreau, (Wed Jan 23, 5:19 pm)
[PATCH 1/2] x86: GEODE fix MFGPT input clock value, Willy Tarreau, (Wed Jan 23, 5:18 pm)
Re: [PATCH 1/2] x86: GEODE fix MFGPT input clock value, H. Peter Anvin, (Wed Jan 23, 5:59 pm)
Re: [PATCH 1/2] x86: GEODE fix MFGPT input clock value, Willy Tarreau, (Wed Jan 23, 6:11 pm)
Re: x86: GEODE fix MFGPT input clock value, Jordan Crouse, (Wed Jan 23, 6:38 pm)
Re: x86: GEODE fix MFGPT input clock value, Arnd Hannemann, (Wed Jan 23, 7:17 pm)
Re: [PATCH 1/2] x86: GEODE fix MFGPT input clock value, H. Peter Anvin, (Wed Jan 23, 6:22 pm)
Re: [PATCH 1/2] x86: GEODE fix MFGPT input clock value, Willy Tarreau, (Wed Jan 23, 6:10 pm)
[git pull] was: Re: 2.6.24-rc8 hangs at mfgpt-timer, Thomas Gleixner, (Tue Jan 22, 5:53 pm)
Re: 2.6.24-rc8 hangs at mfgpt-timer, Willy Tarreau, (Tue Jan 22, 5:20 pm)
Re: 2.6.24-rc8 hangs at mfgpt-timer, Jordan Crouse, (Tue Jan 22, 2:15 pm)
Re: 2.6.24-rc8 hangs at mfgpt-timer, Willy Tarreau, (Mon Jan 21, 7:32 pm)
Re: 2.6.24-rc8 hangs at mfgpt-timer, Willy Tarreau, (Tue Jan 22, 4:15 pm)
Re: 2.6.24-rc8 hangs at mfgpt-timer, Jordan Crouse, (Tue Jan 22, 5:08 pm)
Re: 2.6.24-rc8 hangs at mfgpt-timer, Willy Tarreau, (Tue Jan 22, 5:15 pm)
Re: 2.6.24-rc8 hangs at mfgpt-timer, Jordan Crouse, (Wed Jan 23, 12:36 pm)
Re: 2.6.24-rc8 hangs at mfgpt-timer, Willy Tarreau, (Wed Jan 23, 12:10 pm)
Re: 2.6.24-rc8 hangs at mfgpt-timer, Jordan Crouse, (Thu Jan 17, 8:40 pm)
Re: 2.6.24-rc8 hangs at mfgpt-timer, Andres Salomon, (Thu Jan 17, 4:42 pm)