2001-02-17 19:23:09

by Andrea Arcangeli

[permalink] [raw]
Subject: Re: Ingo's RAID patch for 2.2.18 final?

On Fri, Feb 16, 2001 at 10:53:51AM -0500, David Mansfield wrote:
> This may be a bit OT, but when you say O_DIRECT, that implies that you
> can pass that flag to open(2) and it will bypass the page cache, and

yes.

> read directly into user-space buffers (zero-copy IO)? Does this also

yes.

> bypass the read-ahead mechanisms in the kernel? Does it imply O_SYNC?

yes.

It's rawio through the fs. It's not included into 2.4-latest yet.

Andrea