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Currently the ExecPage facility has two users: * GHCi, for constructing info tables, and * the adjustor allocation path Despite neither of these have any spatial locality constraints ExecPage was using the linker's `mmapAnonForLinker`, which tries hard to ensure that mappings end up nearby the executable image. This makes adjustor allocation needlessly subject to fragmentation concerns. We now instead return less constrained mappings, improving the robustness of the mechanism. Addresses #25503. (cherry picked from commit a104508d)
Currently the ExecPage facility has two users: * GHCi, for constructing info tables, and * the adjustor allocation path Despite neither of these have any spatial locality constraints ExecPage was using the linker's `mmapAnonForLinker`, which tries hard to ensure that mappings end up nearby the executable image. This makes adjustor allocation needlessly subject to fragmentation concerns. We now instead return less constrained mappings, improving the robustness of the mechanism. Addresses #25503. (cherry picked from commit a104508d)
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