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    SubjectRe: 2.6.19-rc3 system freezes when ripping with cdparanoia at ioctl(SG_IO)
    --- Christoph Hellwig <hch@infradead.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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