Messages in this thread |  | | Date | Thu, 6 Sep 2001 13:57:42 -0300 (BRST) | From | Rik van Riel <> | Subject | Re: page_launder() on 2.4.9/10 issue |
| |
On Thu, 6 Sep 2001, Daniel Phillips wrote:
> Err, not quite the whole story. It is *never* right to leave the disk > sitting idle while there are dirty, writable IO buffers.
Define "idle" ?
Is idle the time it takes between two readahead requests to be issued, delaying the second request because you just moved the disk arm away ?
Is idle when we haven't had a request for, say, 3 disk seek time periods ?
Is idle when we won't be getting any request soon for the area where the disk arm is hanging out ? (and how do we know the future?)
regards,
Rik -- IA64: a worthy successor to i860.
http://www.surriel.com/ http://distro.conectiva.com/
Send all your spam to aardvark@nl.linux.org (spam digging piggy)
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
|  |