Re: Poor floppy performance in kernel 2.4.10

Manfred Spraul (manfred@colorfullife.com)
Fri, 19 Oct 2001 18:58:49 +0200



Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit

> And with
> the floppy case, there was no way to notice at run-time whether the
> unit was broken or not - the floppy drives have no ID's to blacklist
> etc.

The standard trick is to start with media-change not supported, and
enable it if you get the first change signal.
There are really old floppies that don't support media-change signals,
and they _never_ send it. If you see a media-change signal, then you
know that the floppy is not broken.

Probably a timer (2 seconds) and a delayed cache flush should fix the
problem.

If the device supports media-change and media-lock, then it could
increase the timeout value.

--
	Manfred
-
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/