Re: hammer: MAP_32BIT

[H. Peter Anvin]

Ulrich Drepper wrote:
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> H. Peter Anvin wrote:
> 
>>On the other
>>hand, how big of a performance issue is it really to call mmap() again
>>in the failure scenario *only*?
> 
> 
> Just look at the code, it's very expensive.  In the moment the mmap code
> has to sequentially look at the VMAs in question.  If it fails it means
> it walked the entire data structure without success.  Ingo's patch does
> not address this, it just makes successful allocation usually fast again.
> 

OK, maybe we should fix that instead :-/

	-hpa