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Commit 47d6acd3 authored by Matthew Pickering's avatar Matthew Pickering Committed by Marge Bot
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rts: Use a separate free block list for allocatePinned 

The way in which allocatePinned took blocks out of the nursery was
leading to horrible fragmentation in some workloads.

The strategy now is that a separate free block list is reserved for each
capability and blocks are taken from there. When it's empty the global
SM lock is taken and a fresh block of size PINNED_EMPTY_SIZE is allocated.

Fixes #19481
parent daa6363f
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