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SubjectRe: BUG: Kernel Panic: kernel-2.6.0-test9-bk21 for alpha in scsi context ll_rw_blk.c
On you can read:
See prefetch section:
The Alpha 21264 initiates a prefetch operation by executing one of the load
instructions as summarized in the table below. Note that the destination
register is R31 or F31. When used as a source register, R31 and F31 return
integer zero and floating point zero, respectively. When used as a
destination register as shown below, R31 and F31 denote the purpose of
these instructions as a prefetch operation. Earlier Alpha implementations
ignore these instructions. Some care must be taken as a prefetch with an
invalid address must be dismissed by firmware and a prefetch can cause an
alignment trap.


Falk Hueffner wrote:

> Thomas Steudten <> writes:
>>-> 0xfffffc0000476cb8 <__make_request+152>: lds $f31,0(t2)
> The kernel is stupid, this is a prefetch, it should be totally ignored
> if it is faulty. This is already handled for userspace accesses
> IIRC... (I wonder why the PALcode doesn't already do that. Oh well.)


LINUX user since kernel 0.99.x 1994.
RPM Alpha packages at
Want to know what S.u.S.E 1995 cdrom-set contains?

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