Subject: Re: cp(1) vs. UVM/UBC
To: Ignatios Souvatzis <email@example.com>
From: Matthias Scheler <firstname.lastname@example.org>
Date: 07/19/2001 10:44:03
On Thu, Jul 19, 2001 at 10:40:53AM +0200, Ignatios Souvatzis wrote:
> There are other file systems with potential problems, if I recall right...
> e.g., the DOS\0 and DOS\1 variants of adosfs, which always have some=20
> metadata in their datablocks,
It's DOS\0, DOS\2 and DOS\4 which have metadata in the data blocks.
> ... so for this case, data copying always happens. (Chuck?)
Does mmap() do that transperantly?
> Maybe we need to disable mmap()ing for such filesystems inside the kernel,
> and make cp do the right thing if mmap fails? Is this possible?
Sounds reasonable for "cp". But what about other applications?
Matthias Scheler http://scheler.de/~matthi=