Date: Mon, 5 Feb 1996 02:35:35 +0100 (MET) From: J Wunsch <j@uriah.heep.sax.de> To: freebsd-hackers@freebsd.org (FreeBSD hackers) Subject: Re: FAT filesystem performance Message-ID: <199602050135.CAA02717@uriah.heep.sax.de> In-Reply-To: <199602042218.XAA19281@labinfo.iet.unipi.it> from "Luigi Rizzo" at Feb 4, 96 11:18:18 pm
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As Luigi Rizzo wrote: > > > This would only shift the problem from the msdosfs code into the > > various device drivers. > > Well, let me first say that I don't know exactly how mmapping files > works internally. But what I expect is to have the kernel do its > best to keep blocks in core and write them back (if necessary) when > the file is unmapped. That is also true for any regular file. If you wanna improve the FAT file system implementation, first study its bottlenecks. The msdosfs code could certainly be improved in terms of robustness and performance. Since it's kernel-level, it has full control over what kind of buffers it will allocate, either pageable or non-pageable. -- cheers, J"org joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/ -- NIC: JW11-RIPE Never trust an operating system you don't have sources for. ;-)
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