From: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Date: Fri, 14 Aug 2009 14:10:45 -0700 (PDT)
> On Fri, 14 Aug 2009, Linus Torvalds wrote:
>>
>> But not inline in the code, though. So yeah, it has a memory footprint,
>> but shouldn't have a cache footprint.
>
> An example of this: stack usage. This is the code with BUG_ON():
...
> and note how in the code, we're just jumping over something like four
> bytes ("ud2" plus that silly endless loop-jump just to make gcc happy
> are both 2 bytes on x86[-64]).
>
> Here's the same code with that horrid skb_under_panic():
Yes on x86 it's better even with verbose debugging because
of the inlining of the debug message pointer etc.
I'll have to do something more intelligent than I currently do on
sparc64, and I had always been meaning to do that. :-)
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