Re: [PATCH UPDATE] deflate stack usage in lib/inflate.c

[Chuck Ebbert]

Jeremy Fitzhardinge wrote:
> Andi Kleen wrote:
>>> (This was under Xen, but there's no reason it couldn't happen on bare
>>>   hardware.)
>>>     
>> Hmm, does Xen perhaps not use interrupt stacks?
> 
> Looks like that's all done in do_IRQ, so it should be independent of
> whether its Xen or not.  And the stack overflow check is performed on
> the main stack, before switching to the interrupt stack.
> 

Yeah, the do_IRQ thing is misleading because it makes you think the
interrupt caused an overflow when all it did was detect a
near-overflow condition. (The number printed is the amount of space
left.)
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/