Messages in this thread |  | | Date | Fri, 19 Oct 2001 15:46:54 +0200 | From | Andrea Arcangeli <> | Subject | Re: Poor floppy performance in kernel 2.4.10 |
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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.
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