Change Details

On an Ampere Altra system, the physical memory is populated sparsely within the physical address space, with only about 0.4% of physical addresses backed by RAM in the range [0, last_pa]. This is causing the vm_reserv_array to be over-sized by a few orders of magnitude, wasting roughly 5 GiB on a system with 256 GiB of RAM. MFC after: 1 week Sponsored by: Ampere Computing, Inc.

On an Ampere Altra system, the physical memory is populated sparsely within the physical address space, with only about 0.4% of physical addresses backed by RAM in the range [0, last_pa]. This is causing the vm_reserv_array to be over-sized by a few orders of magnitude, wasting roughly 5 GiB on a system with 256 GiB of RAM. The sparse allocation of vm_reserv_array is controlled by defining VM_PHYSSEG_SPARSE, with the dense allocation still remaining for platforms with VM_PHYSSEG_DENSE. MFC after: 1 week Sponsored by: Ampere Computing, Inc.

On an Ampere Altra system, the physical memory is populated sparsely within the physical address space, with only about 0.4% of physical addresses backed by RAM in the range [0, last_pa]. This is causing the vm_reserv_array to be over-sized by a few orders of magnitude, wasting roughly 5 GiB on a system with 256 GiB of RAM. The sparse allocation of vm_reserv_array is controlled by defining VM_PHYSSEG_SPARSE, with the dense allocation still remaining for platforms with VM_PHYSSEG_DENSE. MFC after: 1 week Sponsored by: Ampere Computing, Inc.