Re: 2.6.0-test3-mm1: scheduling while atomic (ext3?)

[Andi Kleen]

Alan Cox <alan@xxxxxxxxxxxxxxxxxxx> writes:

> Put the likely(pos) in the asm/prefetch for Athlon until someone can
 out what is going on with some specific Athlons, 2.6 and certain
> kernels (notably 4G/4G)

You can use the same workaround as x86-64. add an exception handler and
just jump back. Advantage is that it is completely outside the fast path.

But note you also have to add runtime sorting of __ex_table when you
do this, otherwise the __ex_table becomes unsorted when someone uses
list_for_each (which does prefetch) in a __init function

(all code is available in x86-64, just needs to be ported over)

-Andi
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