Re: O_DIRECT fails in some kernel and FS

From: Andi Kleen (ak@suse.de)
Date: Sun Feb 03 2002 - 02:26:28 EST


Jeff Garzik <garzik@havoc.gtf.org> writes:

> On Sat, Feb 02, 2002 at 02:16:41PM -0600, Stephen Lord wrote:
> > Can't you fall back to buffered I/O for the tail? OK it complicates the
> > code, probably a lot, but it keeps things sane from the user's point of
> > view.
>
> For O_DIRECT, IMHO you should fail not fallback. You're simply lying
> to the underlying program otherwise.

It's just impossible to write a tail which is smaller than a disk block
without another buffer.

-Andi
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