Re: 2.6.19-rc3 system freezes when ripping with cdparanoia at ioctl(SG_IO)

[Luben Tuikov]

--- Christoph Hellwig <hch@xxxxxxxxxxxxx> 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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