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MFC r328611: Try to preallocate receive memory early.

Description

MFC r328611: Try to preallocate receive memory early.

We may not have enough contiguous memory later, when NTB connection get
established. It is quite likely that NTB windows are symmetric and this
allocation remain, but even if not, we will just reallocate it later.

Details

Provenance
mavAuthored on
Parents
rS329056: MFC r328450: Use bus_dmamem_alloc(9) KPI instead of contigmalloc(9).
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