Re: bad pmd filemap.c, oops; 2.4.30 and 2.4.32
From: Roberto Nibali
Date: Mon Jan 16 2006 - 15:51:27 EST
The machine was /not/ booted into that config. It is running the
original config from
http://hashbrown.cts.ucla.edu/pub/oops-200512/config-2.4.32 with
DEBUG_SLAB defined and "pci=noacpi" passed in on the command line.
The config with HIGHIO disabled an ACPI=y has not been tested.
CONFIG_SMP at least sets CONFIG_ACPI_BOOT. Do you still have the boot
messages somewhere (dmesg)? I'd be interested in the difference between
IOAPIC PCI routing entries between pci=noacpi and normal boot.
Thanks for the precision. So logically we should expect it to break
sooner or later ?
It is the same .config as one that crashed before, except that it has
DEBUG_SLAB defined. If it does not crash, then adding pci=noacpi to the
command fixes the problem for me.
Hmm, I'm not fully convinced yet, however glad that it has been a bit
more stable for you.
Sidenote: We boot our systems having built-in AIC7* SCSI on moderately
cheap motherboards with "bad" interrupt routing using pci=noacpi on
2.4.x kernels to evade instability.
I suggest that if you experience more problems using this setup _and_
would like to continue debugging the issue, we take this off-list into a
private discussion.
[Another thing which would be interesting to test regarding the HIGHIO
setting is a RedHat based 2.4.x kernel, since according to some SCSI
driver's documentation, RedHat had a different HIGHIO convention.]
Thanks for your feedback,
Roberto Nibali, ratz
--
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