On Mon, 2010-12-13 at 14:06 +0100, Rik Theys wrote: > Package: linux-2.6 > Version: 2.6.32-29 > Severity: normal > > When performing a lot of I/O, the Xen dom0 kernel crashes with the > following error: > > [ 325.437727] console [netcon0] enabled > [ 325.437795] netconsole: network logging started > [ 1076.017245] mpt2sas 0000:03:00.0: DMA: Out of SW-IOMMU space for > 32768 bytes. > [ 1076.017333] BUG: unable to handle kernel NULL pointer dereference at > 0000000000000010 [...] mpt2sas was not using the correct test for whether DMA mapping succeeded, so it tried to continue after the DMA mapping failure. This has been fixed in a later version and I will apply the fix to Debian's branch of 2.6.32. However, even if this type of error is handled properly, I think it will result in the filesystem being switched to read-only mode, and you will then have to reboot. Using RAID may mitigate this. Ben. -- Ben Hutchings Once a job is fouled up, anything done to improve it makes it worse.
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