On Thu, Aug 25, 2005 at 09:04:06AM +0200, Uwe Schindler wrote: > Hello Norbert, > At 08:00 25.08.2005, you wrote: > >With this kernel I get permanent unaligned trap errors from bzip2: > >bzip2(10013): unaligned trap at 00000200000c3074: 00020c5100020c3d 28 1 > >Does anyone know wether this is a hardware or software problem? > This is a software problem that lies in the ALPHA RISC processor > architecture. The processor cannot access memory that is not aligned > at boundaries conforming to the datatype to be read/written. The > kernel fixes this by doing separate reads/writes that are aligned. > The only drawback with this is that it is a performance problem. > To fix this write a bug report for BZIP or the software that > generates the problem. But do not exspect that they fix this because > alpha is not the main platform and most developers do not have such a > processor. Rather, do not expect this to be fixed unless you can convert the kernel-level trap into a userspace backtrace that the developers can act on. Somewhere in the list archive, there are recipes to get a userspace trap for these... -- Steve Langasek Give me a lever long enough and a Free OS Debian Developer to set it on, and I can move the world. vorlon@debian.org http://www.debian.org/
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