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Re: kern/38643: [dM] st tape drive loses data

The following reply was made to PR kern/38643; it has been noted by GNATS.

From: der Mouse <mouse%Rodents-Montreal.ORG@localhost>
To: Manuel Bouyer <>, Havard Eidnes 
Subject: Re: kern/38643: [dM] st tape drive loses data
Date: Thu, 4 Sep 2008 15:05:11 -0400 (EDT)

 I tried (a) rolling back my concurrency change to physio and (b) making
 stread and stwrite use statically allocated structs buf for their calls
 to physio.
 The results: the same as the concurrency change to physio.  That is, it
 loses one tape record, instead of 15, when reading.  (I found a scratch
 tape, so I was able to do a proper test, which also confirmed the
 behaviour with the concurrency override in physio.)
 In my Copious Spare Time, I hope to be able to try this with some of
 the debugging printfs I see scattered around the st and scsipi code
 turned on.  If-&-when I manage that, I'll report back.
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