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From: John Bradford <john@grabjohn.com>
Message-Id: <200303122220.h2CMKShH001833@81-2-122-30.bradfords.org.uk>
Subject: Re: bio too big device
To: torvalds@transmeta.com (Linus Torvalds)
Date: Wed, 12 Mar 2003 22:20:28 +0000 (GMT)
Cc: linux-kernel@vger.kernel.org
In-Reply-To: <Pine.LNX.4.44.0303121111440.15738-100000@home.transmeta.com> from "Linus Torvalds" at Mar 12, 2003 11:14:52 AM
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> > Couldn't we have a list of known good drives, though, and enable 256
> > sectors as a special case?
> 
> My problem is that I just don't see the point. What's the difference 
> between 256 and 254 sectors? 128kB vs 127kB? 

Ah, I thought there was a reason that it was a Good Thing to keep it
as a power of 2, which would mean 64kB vs 128kB, but if not then I
totally agree.

> Also, looking closer, the current limit actually seems to be _controller_
> dependent, not disk-dependent. I don't know how valid that is, but it
> looks reasonable at least in theory - while the IDE controller is mostly a
> passthrough thing, it does end up doing part of the work. So the picture
> look smore complex than just another drive blacklist.
> 
> In short, the headaches just aren't worth the 127->128kB gain.

I wasn't aware of the controller issue - with that thrown in to the
mix, I see your point.

John.
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