Date: Fri, 4 Nov 2011 10:19:52 -0700 From: Garrett Cooper <yanegomi@gmail.com> To: Alfred Perlstein <alfred@freebsd.org> Cc: Bruce Cran <bruce@cran.org.uk>, Ed Schouten <ed@80386.nl>, Jilles Tjoelker <jilles@stack.nl>, John Baldwin <jhb@FreeBSD.org>, arch@freebsd.org Subject: Re: [PATCH] fadvise(2) system call Message-ID: <B8639E15-A66F-45DA-A6AA-195349EAE412@gmail.com> In-Reply-To: <20111104160319.GD6110@elvis.mu.org> References: <201110281426.00013.jhb@freebsd.org> <201111011308.05204.jhb@freebsd.org> <4EB08740.8010601@cran.org.uk> <201111021136.12629.jhb@freebsd.org> <20111102202015.GQ6110@elvis.mu.org> <4EB2C9DD.9090606@FreeBSD.org> <20111104160319.GD6110@elvis.mu.org>
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On Nov 4, 2011, at 9:03 AM, Alfred Perlstein wrote: > * 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()). >>>>>=20 >>>>> There's >>>>> http://www.speedware.com/HPe3000_resources/MPE_to_HP-UX_cross- >>>> = reference/system_administration_cross-reference/cmd.html?cmdid=3DMS_1800 >>>>> for HP-UX ("*fadvise()* was derived by HP from the IEEE POSIX >>>>> 1003.1-2001 Standard"), though it also has posix_fadvise. >>>>=20 >>>> 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"). >>>=20 >>> Makes sense for gzip/tar. >>=20 >> 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. >=20 > You often spend time untarring the same tarball over and over=20 > in your workflow John? This is starting to sound like something that libarchive / pkg_install = would benefit from (jkh pkg_install or pkgng). -Garrett=
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