Re: Is user-space AIO dead?

[David Lloyd]

On Wed, 11 Jan 2006, Kenny Simpson wrote:

> --- David Lloyd <dmlloyd@xxxxxxx> wrote:
> > Wouldn't nonblocking I/O on regular files be nice?
>
> Yes it could be.  As I understand it, regular file writes (not O_DIRECT) 
> are only to the page cache and only block when there is memory pressure 
> (so it is more of a throttle).

If you were however using O_DIRECT or O_SYNC, you would then have a 
mechanism to know when your writes have made it to disk, which might be 
useful for transactional systems.

- D
-
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/