20 lines
880 B
Markdown
20 lines
880 B
Markdown
# Difference from published paper
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This document outlines the changes that have diverged from the published paper
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on `snmalloc`.
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1. Link no longer terminates the bump-free list. The paper describes a
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complex invariant for how the final element of the bump-free list can
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also be the link node.
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We now have a much simpler invariant. The link is either 1, signifying
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the block is completely full. Or not 1, signifying it has at least one
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free element at the offset contained in link, and that contains the DLL
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node for this sizeclass.
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The bump-free list contains additional free elements, and the remaining
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bump allocated space.
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The value 1, is never a valid bump allocation value, as we initially
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allocate the first entry as the link, so we can use 1 as the no more bump
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space value. |