Michał Chojnowski 7b3f55a65f logalloc: add hold_reserve ...

mutation_partition_v2::apply_monotonically() needs to perform some allocations
in a destructor, to ensure that the invariants of the data structure are
restored before returning. But it is usually called with reclaiming disabled,
so the allocations might fail even in a perfectly healthy node with plenty of
reclaimable memory.

This patch adds a mechanism which allows to reserve some LSA memory (by
asking the allocator to keep it unused) and make it available for allocation
right when we need to guarantee allocation success.

2024-07-08 16:08:27 +02:00

112 KiB

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