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Date:      Sat, 07 Nov 1998 12:14:22 +0800
From:      Peter Wemm <peter@netplex.com.au>
To:        Joseph Koshy <jkoshy@FreeBSD.ORG>
Cc:        roberto@keltia.freenix.fr, cvs-committers@hub.freebsd.org
Subject:   Re: cvs commit: src/sys/conf options param.c src/sys/kern init_sysent.c syscalls.c syscalls.master uipc_syscalls.c src/sys/sys mbuf.h socket.h socketvar.h syscall-hide.h syscall.h syscall.mk sysproto.h src/sys/vm vm_object.c 
Message-ID:  <199811070414.MAA17924@spinner.netplex.com.au>
In-Reply-To: Your message of "Fri, 06 Nov 1998 17:47:03 PST." <199811070147.RAA10097@freefall.freebsd.org> 

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Joseph Koshy wrote:
> 
> According to Ollivier Robert:
> 
> > Except to my knowledge, UVM doesn't have a unified VM/buffer cache, one of
> > the best features of FreeBSD (and that changes a lot of things
> > performance-wise).
> 
> Yes, the thesis explicitly mentions this as one of the areas of future
> work.

And a few weeks ago somebody posted about a prototype implementation.  
For read/writes, files are effectively mmap'ed by the kernel and the data 
copied too/from the user.  ie: file IO is done via VM, the same way that 
SVR4/Sun/Solaris do it.

Cheers,
-Peter



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