Re: Poor floppy performance in kernel 2.4.10

[Andrea Arcangeli]

On Fri, Oct 19, 2001 at 09:50:06AM +0200, Giuliano Pochini wrote:
> 
> > Indeed, only 2.2 trusted the check media change information and left the
> > cache valid on top of the floppy across close/open of the blkdev.
> 
> Which is not a bad thing IMHO, but it can cause problems with
> some broken SCSI implementation where the drive doesn't send
> UNIT_ATTENTION after a media change (like my MO drive when I
> misconfigured the jumpers, damn :-((( ).

Yes, I was aware of that. We'd need a kind of "media change enabler"
bitflag in each lowlevel driver, to implement a blacklist (or whitelist
if you feel safer) that will tell us if to trust the media change info
or not.

Ciao,
Andrea