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Date: Sat, 11 Nov 2006 11:09:33 -0800 (PST)
From: Luben Tuikov <ltuikov@...oo.com>
To: Christoph Hellwig <hch@...radead.org>
Cc: dougg@...que.net, Tejun Heo <htejun@...il.com>,
Brice Goglin <Brice.Goglin@...-lyon.org>,
Jens Axboe <jens.axboe@...cle.com>,
Gregor Jasny <gjasny@...glemail.com>,
Linux Kernel <linux-kernel@...r.kernel.org>,
Jeff Garzik <jgarzik@...ox.com>, linux-ide@...r.kernel.org,
monty@...h.org, linux-scsi@...r.kernel.org
Subject: Re: 2.6.19-rc3 system freezes when ripping with cdparanoia at ioctl(SG_IO)
--- Christoph Hellwig <hch@...radead.org> wrote:
> On Fri, Nov 10, 2006 at 12:08:15PM -0800, Luben Tuikov wrote:
> > P.S. I'd love to see SG_DXFER_TO_FROM_DEV completely ripped out
> > of sg.c, for obvious reasons. Can you not duplicate the resid "fix"
> > it provides into "FROM_DEV" -- do apps really rely on it?
>
> At the beginning of this thread it was mentioned cdparanio uses it.
> But in general we can't just rip out userland interfaces, we pretend
> to have a stable userspace abi (and except for the big sysfs mess that
> actually comes very close to the truth).
The more reason to think things thorougly when introducing
new code and architecture into a kernel.
Luben
> What we should do is to document very well what SG_DXFER_TO_FROM_DEV
> is doing and that odd name that's been chosen for it. I'll prepare
> a patch for that.
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