[PATCH] fadvise(2) system call

[Garrett Cooper]

On Nov 4, 2011, at 9:03 AM, Alfred Perlstein wrote:

> * John Baldwin <jhb at FreeBSD.org> [111103 19:38] wrote:
>> On 11/2/11 1:20 PM, Alfred Perlstein wrote:
>>> * John Baldwin<jhb at 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?

This is starting to sound like something that libarchive / pkg_install would benefit from (jkh pkg_install or pkgng).
-Garrett