Re: [v2] fadvise: perform WILLNEED readahead asynchronously

[Eric Wong]

Riccardo Magliocchetti <riccardo.magliocchetti@xxxxxxxxx> 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 :)
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/