lkml.org 
[lkml]   [2013]   [Jan]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [v2] fadvise: perform WILLNEED readahead asynchronously
Riccardo Magliocchetti <riccardo.magliocchetti@gmail.com> wrote:
> Hello,
>
> Il 25/12/2012 03:22, Eric Wong ha scritto:
> > Any other (Free Software) applications that might benefit from
> > lower FADV_WILLNEED latency?
>
> Not with fadvise but with madvise. Libreoffice / Openoffice.org have
> this comment:
>
> // On Linux, madvise(..., MADV_WILLNEED) appears to have the undesirable
> // effect of not returning until the data has actually been paged in, so
> // that its net effect would typically be to slow down the process
> // (which could start processing at the beginning of the data while the
> // OS simultaneously pages in the rest); on other platforms, it remains
> // to be evaluated whether madvise or equivalent is available and
> // actually useful:
>
> See:
> http://cgit.freedesktop.org/libreoffice/core/tree/sal/osl/unx/file.cxx#n1213
>
> May the same approach be extended to madvise MADV_WILLNEED?

Definitely yes, it should be easy. This project low-priority for me at
the moment, if you or anybody else wants to take a stab at it,
please do :)


\
 
 \ /
  Last update: 2013-01-10 12:41    [W:0.100 / U:4.420 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site