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SubjectRe: resend--[PATCH] improve read ahead in kernel
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On Sun, 2012-12-16 at 02:15 +0000, Eric Wong wrote:
> xtu4 <xiaobing.tu@intel.com> wrote:
> > resend it, due to format error
> >
> > Subject: [PATCH] when system in low memory scenario, imaging there is a mp3
> > play, ora video play, we need to read mp3 or video file
> > from memory to page cache,but when system lack of memory,
> > page cache of mp3 or video file will be reclaimed.once read
> > in memory, then reclaimed, it will cause audio or video
> > glitch,and it will increase the io operation at the same
> > time.
>
> To me, this basically describes how POSIX_FADV_NOREUSE should work.

Hi Eric,

But why fadvise POSIX_FADV_NOREUSE almost do nothing? Why not set some
flag or other things for these use once data?

> I would like to have this ability via fadvise (and not CONFIG_).
>
> Also, I think your patch has too many #ifdefs to be accepted.
>
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