Re: Review of Thomas's >2GB ext2fs proposal

[Thomas Bushnell BSG]

Ognyan Kulev <ogi@fmi.uni-sofia.bg> writes:

> This is new to me.  I always thought that vm_map/vm_unmap is expensive.

It is a system call.  But it is nothing as expensive as a disk read.
It is worth avoiding unnecessary calls to vm_map; it is the same as
vm_allocate.  It is entirely harmless to augment a disk access with a
vm_map call.