[RFC PATCH 0/3] Improved ALSR

[Florian Weimer]

* Topi Miettinen:

> On 23.11.2020 23.45, Florian Weimer wrote:
>> * Topi Miettinen via Libc-alpha:
>> 
>>> $ time ./malloc-vs-sbrk
>>>
>>> real    0m1.923s
>>> user    0m0.160s
>>> sys     0m1.762s
>>> $ time ./malloc-vs-sbrk 1
>>>
>>> real    0m2.847s
>>> user    0m0.176s
>>> sys     0m2.669s
>> Does the difference go away if you change the mmap granularity to
>> 128 KiB?  I think this happens under the covers (on the kernel side)
>> with sbrk.
>
> Does not seem so, 56% increase:

But the test does not seem very realistic because the pages are never
faulted in.  Sorry, I didn't check that before.

Thanks,
Florian
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