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Date: Fri, 4 Nov 2011 09:03:20 -0700
From: Alfred Perlstein <alfred@freebsd.org>
To: John Baldwin <jhb@FreeBSD.org>
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Cc: Bruce Cran <bruce@cran.org.uk>, Ed Schouten <ed@80386.nl>,
	Jilles Tjoelker <jilles@stack.nl>, arch@freebsd.org
Subject: Re: [PATCH] fadvise(2) system call
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* John Baldwin <jhb@FreeBSD.org> [111103 19:38] wrote:
> On 11/2/11 1:20 PM, Alfred Perlstein wrote:
> >* John Baldwin<jhb@freebsd.org>  [111102 11:05] wrote:
> >>On Tuesday, November 01, 2011 7:56:48 pm Bruce Cran wrote:
> >>>On 01/11/2011 17:08, John Baldwin wrote:
> >>>>I had found it via the web: http://linux.die.net/man/2/fadvise
> >>>>However, after further searching it appears to be stale (if you follow
> >>>>it's cross-reference to madvise(2), that page only has links to
> >>>>posix_fadvise() and not fadvise()).
> >>>
> >>>There's
> >>>http://www.speedware.com/HPe3000_resources/MPE_to_HP-UX_cross-
> >>reference/system_administration_cross-reference/cmd.html?cmdid=MS_1800
> >>>for HP-UX ("*fadvise()* was derived by HP from the IEEE POSIX
> >>>1003.1-2001 Standard"), though it also has posix_fadvise.
> >>
> >>Hmm, that one actually has an extra argument.  I'll just go with
> >>posix_fadvise() for now.  Interesting that HP lets you OR together
> >>two policies (so you can say both "I will access this file sequentially
> >>and with noreuse").
> >
> >Makes sense for gzip/tar.
> 
> Ehh, quite possibly not for something that generic.  I think you only
> want to do this if you have very specific knowledge about your access
> pattern, and I do not think they are generically applicable.

You often spend time untarring the same tarball over and over 
in your workflow John?

-- 
- Alfred Perlstein
.- VMOA #5191, 03 vmax, 92 gs500, 85 ch250, 07 zx10
.- FreeBSD committer