Re: X freezes kernel during exit [Re: 2.6.23-rc3-mm1]

[Jiri Slaby]

On 09/09/2007 02:47 PM, Andrew Morton wrote:
> On Sun, 09 Sep 2007 13:44:56 +0200 Jiri Slaby <jirislaby@xxxxxxxxx> wrote:
> 
>> On 08/28/2007 01:41 PM, Jiri Slaby wrote:
>>> Does this went through to your boxes? Any progress, clue, idea?
>>>
>>> Jiri Slaby napsal(a):
>>>> Andrew Morton napsal(a):
>>>>> ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.23-rc3/2.6.23-rc3-mm1/
>>>> Hi,
>>>>
>>>> I've found a regression against 2.6.23-rc2-mm2. X server shutdown freezes
>>>> (untainted) kernel hardly. Nothing on netconsole, X output follows:
>>>>
>>>>
>>>> X Window System Version 1.3.0
>>>> Release Date: 19 April 2007
>>>> X Protocol Version 11, Revision 0, Release 1.3
>>>> Build Operating System: Fedora Core 7 Red Hat, Inc.
>>>> Current Operating System: Linux bellona 2.6.23-rc3-mm1 #315 SMP Wed Aug 22
>>>> 21:43:06 CEST 2007 i686
>>>> Build Date: 11 June 2007
>>>> Build ID: xorg-x11-server 1.3.0.0-9.fc7
>>>>         Before reporting problems, check http://wiki.x.org
>>>>         to make sure that you have the latest version.
>>>> Module Loader present
>>>> Markers: (--) probed, (**) from config file, (==) default setting,
>>>>         (++) from command line, (!!) notice, (II) informational,
>>>>         (WW) warning, (EE) error, (NI) not implemented, (??) unknown.
>>>> (==) Log file: "/var/log/Xorg.0.log", Time: Sun Aug 26 14:22:43 2007
>>>> (==) Using config file: "/etc/X11/xorg.conf"
>>>> (WW) RADEON: No matching Device section for instance (BusID PCI:1:0:1) found
>>>> (**) RADEON(0): RADEONPreInit
>>>> (II) Module already built-in
>>>> (II) Module already built-in
>>>> (II) Module already built-in
>>>> (**) RADEON(0): RADEONScreenInit f0000000 0
>>>> (**) RADEON(0): Map: 0xf0000000, 0x04000000
>>>> (**) RADEON(0): RADEONSave
>>>> (**) RADEON(0): RADEONSaveMode(0x8240870)
>>>> (**) RADEON(0): Read: 0x0000000c 0x00030065 0x00000000
>>>> (**) RADEON(0): Read: rd=12, fd=101, pd=3
>>>> (**) RADEON(0): RADEONSaveMode returns 0x8240870
>>>> (**) RADEON(0): DRI New memory map param
>>>> (**) RADEON(0): RADEONInitMemoryMap() :
>>>> (**) RADEON(0):   mem_size         : 0x04000000
>>>> (**) RADEON(0):   MC_FB_LOCATION   : 0xf3fff000
>>>> (**) RADEON(0):   MC_AGP_LOCATION  : 0xffffffc0
>>>> (**) RADEON(0): RADEONModeInit()
>>>> 1280x1024     108.00  1280 1328 1440 1688  1024 1025 1028 1066 (24,32) +H +V
>>>> 1280x1024     108.00  1280 1328 1440 1688  1024 1025 1028 1066 (24,32) +H +V
>>>> (**) RADEON(0): Pitch = 10485920 bytes (virtualX = 1280, displayWidth = 1280)
>>>> (**) RADEON(0): dc=10800, of=21600, fd=96, pd=2
>>>> (**) RADEON(0): RADEONInit returns 0x8241220
>>>> (**) RADEON(0): RADEONRestoreMode()
>>>> (**) RADEON(0): RADEONRestoreMode(0x8241220)
>>>> (**) RADEON(0): RADEONRestoreMemMapRegisters() :
>>>> (**) RADEON(0):   MC_FB_LOCATION   : 0xf3fff000
>>>> (**) RADEON(0):   MC_AGP_LOCATION  : 0xffffffc0
>>>> (**) RADEON(0):   Map Changed ! Applying ...
>>>> (**) RADEON(0):   Map applied, resetting engine ...
>>>> (**) RADEON(0): Updating display base addresses...
>>>> (**) RADEON(0): Memory map updated.
>>>> (**) RADEON(0): Programming CRTC1, offset: 0x00000000
>>>> (**) RADEON(0): Wrote: 0x0000000c 0x00010060 0x00000000 (0x0000a400)
>>>> (**) RADEON(0): Wrote: rd=12, fd=96, pd=1
>>>> (**) RADEON(0): GRPH_BUFFER_CNTL from 20205c5c to 20125c5c
>>>> (**) RADEON(0): RADEONSaveScreen(0)
>>>> (**) RADEON(0): Setting up initial surfaces
>>>> (**) RADEON(0): Initializing fb layer
>>>> (**) RADEON(0): Setting up accel memmap
>>>> (**) RADEON(0): Initializing backing store
>>>> (**) RADEON(0): DRI Finishing init !
>>>> (**) RADEON(0): EngineRestore (32/32)
>>>> (**) RADEON(0): GRPH_BUFFER_CNTL from 20205c5c to 20125c5c
>>>> (**) RADEON(0): Setting up final surfaces
>>>> (**) RADEON(0): Initializing Acceleration
>>>> (**) RADEON(0): EngineInit (32/32)
>>>> (**) RADEON(0): Pitch for acceleration = 160
>>>> (**) RADEON(0): EngineRestore (32/32)
>>>> (**) RADEON(0): Initializing DPMS
>>>> (**) RADEON(0): Initializing Cursor
>>>> (**) RADEON(0): Initializing color map
>>>> (**) RADEON(0): Initializing DGA
>>>> (**) RADEON(0): Initializing Xv
>>>> (**) RADEON(0): RADEONScreenInit finished
>>>> (**) RADEON(0): RADEONSaveScreen(2)
>>>> (**) RADEON(0): RADEONCloseScreen
>>>> (**) RADEON(0): RADEONDRIStop
>>>> (**) RADEON(0): EngineRestore (32/32)
>>>> (**) RADEON(0): RADEONDisplayPowerManagementSet(0,0x0)
>>>> (**) RADEON(0): RADEONRestore
>>>> (**) RADEON(0): RADEONRestoreMode()
>>>> (**) RADEON(0): RADEONRestoreMode(0x8240870)
>>>> (**) RADEON(0): RADEONRestoreMemMapRegisters() :
>>>> (**) RADEON(0):   MC_FB_LOCATION   : 0x1fff0000
>>>> (**) RADEON(0):   MC_AGP_LOCATION  : 0x27ff2000
>>>> (**) RADEON(0):   Map Changed ! Applying ...
>>>> (**) RADEON(0):   Map applied, resetting engine ...
>>>> (**) RADEON(0): Updating display base addresses...
>>>> (**) RADEON(0): Memory map updated.
>>>> (**) RADEON(0): Programming CRTC1, offset: 0x00000000
>>>> (**) RADEON(0): Wrote: 0x0000000c 0x00030065 0x00000000 (0x0000a400)
>>>> (**) RADEON(0): Wrote: rd=12, fd=101, pd=3
>>>> (**) RADEON(0): Disposing accel...
>>>> (**) RADEON(0): Disposing cusor info
>>>> (**) RADEON(0): Disposing DGA
>>>> (**) RADEON(0): Unmapping memory
>>>> (**) RADEON(0): RADEONDRICloseScreen
>>>>
>>>>
>>>>
>>>> the only difference is, that 2.6.23-rc2-mm2 writes further
>>>>
>>>> FreeFontPath: FPE "/usr/share/X11/fonts/misc:unscaled" refcount is 2, should be
>>>> 1; fixing.
>>>>
>>>> and exits succesfully (note that these messages are taken on remote host, X
>>>> runned remotely).
>>>>
>>>> Both vesa and radeon + Option "NoAccel" "true" works obviously fine.
>> Also intel on integrated i915 causes this (NoAccell has no effect in this case).
>> Note that also 2.6.23-rc4-mm1 is affected by this behaviour.
>> I have a trace for you:
>> http://www.fi.muni.cz/~xslaby/sklad/panics/x-freeze.png
>> (this is the only what I'm able to grab so far)
>>
> 
> afacit everything on that call trace is good.  I guess it's possible that
> one of the higher-level loops has gone infinite (eg, the one in
> agp_remove_controller()).
> 
> Are you able to get netconsole working, and run sysrq-P and sysrq-T
> ten or so times, see if it's always stuck in the same place on the
> same CPU?

Hm, I suspect Andi's x86_64-mm-cpa-clflush.patch or something like that. It
loops in flush_kernel_map in list_for_each_entry on the first CPU. The a->l list
is somehow corrupted I guess.

regards,
-- 
Jiri Slaby (jirislaby@xxxxxxxxx)
Faculty of Informatics, Masaryk University
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