Messages in this thread | | | Subject | Re: silent semantic changes with reiser4 | From | Bernd Petrovitsch <> | Date | Fri, 27 Aug 2004 11:03:46 +0200 |
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On Fri, 2004-08-27 at 10:49 +0200, Christoph Hellwig wrote:
> On Fri, Aug 27, 2004 at 09:41:07AM +0200, Bernd Petrovitsch wrote: > > > > UNIX doesn't have a copy systemcall, applications copy the data > > > > manually. > > > > > > Oh, this is very unfortunate and should be a bigger issue to fix. > > > > Then you have to rewrite POSIX und SuSv3. > > They don't say 'you must now have a copy syscall'. Having one that's > actually used by system tools would be a great optimization for many > network or distributed filesystems.
ACK. But actually spam apparently assumes that the kernel - userspace interface is at the wrong abstraction level. And this is conceptually bound IMHO to POSIX. And it does not solve the problem, that the read() and write() sys-calls will not vanish. Even if a copy() sys-call exists.
Bernd -- Firmix Software GmbH http://www.firmix.at/ mobil: +43 664 4416156 fax: +43 1 7890849-55 Embedded Linux Development and Services
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