Gunnar Beutner 3438829431 LibC: Lazily initialize malloc chunks ...

By default malloc manages memory internally in larger blocks. When
one of those blocks is added we initialize a free list by touching
each of the new block's pages, thereby committing all that memory
upfront.

This changes malloc to build the free list on demand which as a
bonus also distributes the latency hit for new blocks more evenly
because the page faults for the zero pages now don't happen all at
once.

2021-05-06 10:38:46 +02:00

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