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From: | Thomas Bushnell BSG |
Subject: | Re: Review of Thomas's >2GB ext2fs proposal |
Date: | 17 Aug 2004 02:30:43 -0700 |
User-agent: | Gnus/5.09 (Gnus v5.9.0) Emacs/21.3 |
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.
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