Re: [linuxsh-dev] slab poisoning

[NIIBE Y. <gn...@ch...>]

Stuart Menefy wrote:
 > I've found what was causing the 'slab poisoning' problem which I reported
 > a few days ago. There is a bug in the kernel when setting the interrupt
 > mask bits in the status register when returning from an exception. This
 > can result in interrupts being re-enabled when they should not be.
[...]

Well spotted.  But still I think that the issue I mentioned exists
(when packet length is odd).

 > I'm surprised nobody else is seeing these problems. Are we the only
 > people using SH4 perhaps?

SolutionEngine SH4 is configured using it's own interrupt controller, 
so it doesn't used irq_mask.

 > One thing I did spot while doing this. The irq_imask technique of
 > interrupt masking will not work with interrupts at priority 15. Not
 > really a problem, but it might be worth adding a comment somewhere
 > before this trips somebody up.

Agreed.

Please check all of the pending patches of yours in.  I have an idea
for handling alias issue of shared page.  I'll modify the code, when
you commit.
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