Oops #817 on ARM MPCore with 2.6.22-rc3

Joerg Wagner <wagner <at> ccrl-nece.de> writes:

quoted

One more patch worth testing is:

http://www.linux-arm.org/git?p=linux-

2.6.git;a=commitdiff_plain;h=3fe656e0dece808ae1de97f98a2e917c46573beb

That one looks very interesting indeed.
However I cannot find any information about the mentioned errata.
Sadly enough the workaround presented here uses privileged access to CP15 

which might fix the kernel but

userspace programs are left out.

If someone can put more light into this I would be glad to hear about it.
At the first glance it seems to add artificial idle cycles to all operations 

based on ldrex/strex

combination, but why are they coupled to the processor id ? Isn't there a 

chance that a process/threads

gets moved to another processor when running code in kernel space (when 

running the idle loop), given a

preemptive kernel.

Regards !

Joerg

Hi  wanger,

Did  this  problem  got  solved .  What  was  the  solution .  I  am  getting 
similar  Error  .

regards,
shaiju

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