[erlang-questions] Linux O_DIRECT flag
Sat Mar 15 12:22:07 CET 2008
> After a brief investigation regarding ones ability to bypass the cache
> (performed by our hardware supplier), I've been told that an application may
> bypass the cache by porviding additional flag to "open" system call --
> O_DIRECT to be more specific. I assume that file:open/2 does not support
> this flag, so I'd like to ask, before we start hacking around: is there an
> easy way to expose this flag, and would you consider it for inclusion in one
> of the next releases. Provided that O_DIRECT does what we think it does, of
It seems like O_DIRECT requires userspace buffers to be page-aligned.
That might be another problem other than just passing O_DIRECT to the
My guess is that you want to write your own loadable driver to make
use of these os-specific features.
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