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Date:      Mon, 18 Oct 1999 13:58:03 -0400 (EDT)
From:      Andrew Gallatin <gallatin@cs.duke.edu>
To:        Soren Schmidt <sos@freebsd.dk>
Cc:        mjacob@feral.com, sos@FreeBSD.ORG, alpha@FreeBSD.ORG
Subject:   Re: workaround for ata driver woes on alpha
Message-ID:  <14347.24351.390250.179176@grits.cs.duke.edu>
In-Reply-To: <199910181741.TAA99649@freebsd.dk>
References:  <14347.23151.744866.110836@grits.cs.duke.edu> <199910181741.TAA99649@freebsd.dk>

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Soren Schmidt writes:
 > It seems Andrew Gallatin wrote:
 > >=20
 > > S=F8ren Schmidt writes:
 > >  >=20
 > >  > Well, the problem is that I didn't use hz to get the right time=
out (there
 > >  > the patch is correct) I missed that one sorry.
 > >  > There could be a window problem, but it is highly unlikely that=
 an ATA
 > >  > disk is going to respond with an interrupt after the timeout ha=
ppend,
 > >  > but its not impossible.=20
 > >=20
 > > May I commit the hz fix?
 > >=20
 >=20
 > Sure.

Ok, done.   Thanks.

 > >  > > Soren- this is your stuff isn't it- what have we misunderstoo=
d?
 > >  >=20
 > >  > This all needs more thought, I've just not had the time yet to =
do
 > >  > more about it. Hopefully when I return from FreeBSDCon I'm have=
 a
 > >  > little more time for this...
 > >=20
 > > We (a grad student here & I ) talked about this at lunch.  We thin=
k we=20
 > > might have a real fix.  I'll pass it along after we test it.
 >=20
 > OK, I'll take a look at it, but no promises :)

This is the same grad student (darrell Anderson) who gave you
ad_dump().  -;)

BTW -- I just talked to a collegue here who's getting screwed by
ad_timeout() with a very slow disk on a pc.  It sounds like it could
be the same problem.

Drew

-----------------------------------------------------------------------=
-------
Andrew Gallatin, Sr Systems Programmer=09http://www.cs.duke.edu/~gallat=
in
Duke University=09=09=09=09Email: gallatin@cs.duke.edu
Department of Computer Science=09=09Phone: (919) 660-6590




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