While you are right that there are problems with abort and reset,
I believe that they have always been there. In general, fault handling
should have been slowly been improving as time has gone on (and I get ideas
as to how to handle some of these situations).
I cannot think of anything that has changed at the scsi level
which could explain this sort of problem - I guess my inclination is to
wonder whether the new page cache stuff is related.
One thing to keep in mind that may be related - I have discovered
that with some disk drives, attempts to access beyond the end of the disk
will lock the thing up. It is possible that with the new page cache
we are inadvertently requesting a sector that is beyond the end, and
this is leading to a lockup. One way to test this is to simply look at the
messages logged to the console and see what sectors we are trying to
access when the thing locks up.
-Eric
-- "The woods are lovely, dark and deep. But I have promises to keep, And lines to code before I sleep, And lines to code before I sleep."