Fundamental issues for the ASU

Carsten Haitzler (The Rasterman) raster at openmoko.org
Fri May 16 17:03:34 CEST 2008


On Fri, 16 May 2008 15:56:15 +0100 Andy Green <andy at openmoko.com> babbled:

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> Somebody in the thread at some point said:
> | On Fri, 16 May 2008 16:25:47 +0200 Holger Freyther
> <zecke at openmoko.org> babbled:
> |
> |> Hey,
> |>
> |> for the ASU I only have two bugs that worry me:
> |>
> |> 	- Xglamo eating all of my CPU after a while (94% now). I will try
> |> to get a backtrace. Anyone with a spare cycle to look into this? This
> issue only
> |> comes after the device is on for a long time(in my case over 20
> hours). And
> |> we already have a open bug for this. Anyone interested in fixing it?
> |>
> |> 	The backtace looks innocent:
> |> 		#0  0x401f88ac in gettimeofday () from /lib/libc.so.6
> |> 		#1  0x00014eb4 in GLAMOEngineWaitReal ()
> |> 		#2  0x00015270 in GLAMOFlushCMDQCache ()
> |> 		#3  0x00015e70 in GLAMOBlockHandler ()
> |> 		#4  0x0001f704 in BlockHandler ()
> |> 		#5  0x000ec274 in WaitForSomething ()
> |> 		#6  0x00038a2c in Dispatch ()
> |> 		#7  0x00022c60 in main ()
> |> 		#8  0x401909fc in __libc_start_main () from /lib/libc.so.6
> |> 		#9  0x00012614 in _start ()
> |
> | gah! waiting for the cmdq to flush and it never does. thats bad. too much
> | context switching - lets keep this filed for now?
> 
> Command queue handling in glamofb -- and it seems from what I saw xglamo
> contains a cut and paste of it -- had a very bad issue with not having
> locking around command queue stuff, which is AFAIK modal in the Glamo.
> I added locking there and various kernel badness on boot went away.  So
> suggest eyeballing it with that in mind.

x wont have any locks in it as its not threaded! :) but good advice in
general! :)

> Also as it stands, it seems the dist kernel image can't boot ext2 off SD
> card, perhaps ext2 is not in the config somehow.  I replaced it with the
> defconfig-2.6.24 based kernel and I was able to boot fine off SD card.
> 
> - -Andy
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-- 
Carsten Haitzler (The Rasterman) <raster at openmoko.org>



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