Subject : 2.6.27-rc-7: BUG: scheduling while atomic: swapper/0/0x00000102
Submitter : Prakash Punnoor <firstname.lastname@example.org>
Date : 2008-09-28 17:45
References : http://marc.info/?l=linux-kernel&m=122262403415629&w=4
Handled-By : Thomas Gleixner <email@example.com>
This entry is being used for tracking a regression from 2.6.26. Please don't
close it until the problem is fixed in the mainline.
Thomas, I think this is fixed now, correct?
At least I didn't have the problem again (no being on 220.127.116.11). But I also don't know how to properly reproduce it.
Created attachment 18934 [details]
screenshot after crash
Created attachment 18935 [details]
My system is very regularly going down because of this since about a week or two. That coincided with inserting an ati PCIE card into my system but as i am getting crashes with either ati proprietary or radeonhd driver, i don't know if that is relevant to this. as of now i haven't been successfull in getting my kdump kernel to boot after the freeze for whatever reason so i am voting for reopening of this bug and attaching two JPEG stackdumps ;)
..or should i rather open a new bug for a newer version?
One of the screenshots shows a machine check exception, which means
that there is something seriously wrong with your system.
The second screenshot also has the machine check taint flag set ("M").
That's a hardware problem. Does it go away when you replace the PCIE
card you added recently ?
Any chance to capture the printks via a serial console ?
Created attachment 19073 [details]
shot of the MCE occuring
sorry for the delay i did not yet get a 0modem cable to setup a serial console, neither did i take that PCIE card out. The strange thing is, right in between those incidents my machine was running fine for almost a week (?) and now it is back to regular crashes; i just watched another one occur. The screenshot attached shows the syslog on tty12 and feeding that line into mcelog --ascii manually gives:
# echo "CPU 0: Machine Check Exception: 4 Bank 4: b200000000070f0f" |mcelog --ascii
WARNING: with --dmi mcelog --ascii must run on the same machine with the
same BIOS/memory configuration as where the machine check occurred.
HARDWARE ERROR. This is *NOT* a software problem!
Please contact your hardware vendor
CPU 0 4 northbridge Northbridge Watchdog error
bit57 = processor context corrupt
bit61 = error uncorrected
bus error 'generic participation, request timed out
generic error mem transaction
generic access, level generic'
STATUS b200000000070f0f MCGSTATUS 4
Can you interpret anything into this?
How stupid.. after making sure memtest showed up no problems i removed the card and now with the onboard nforce GPU the crashes are gone, but also my X performance (shared memory fake VRAM).. is this a know problem with nforce4 chipsets in combination with ATI PCIE cards?
> How stupid.. after making sure memtest showed up no problems i
> removed the card and now with the onboard nforce GPU the crashes are
> gone, but also my X performance (shared memory fake VRAM).. is this
> a know problem with nforce4 chipsets in combination with ATI PCIE
Not that I know. I have no idea what might cause the massive
corruption on your board. Did you check for BIOS updates for the board