Re: [PATCH RFC 0/3] simple copy offloading system call

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On May 6, 2015 11:45 AM, "Michael Kerrisk" <mtk.manpages@xxxxxxxxx> wrote:
>
> [CC += linux-api@xxxxxxxxxxxxxxx]
>
> Zach,
>
> Since this is a kernel-user-space API change, please CC linux-api@.
> The kernel source file Documentation/SubmitChecklist notes that all
> Linux kernel patches that change userspace interfaces should be CCed
> to linux-api@xxxxxxxxxxxxxxx, so that the various parties who are
> interested in API changes are informed. For further information, see
> https://www.kernel.org/doc/man-pages/linux-api-ml.html
>
> Thanks,
>
> Michael
>
>
>
>
> On Sat, Apr 11, 2015 at 12:00 AM, Zach Brown <zab@xxxxxxxxxx> wrote:
> > Hello everyone!
> >
> > Here's my current attempt at the most basic system call interface for
> > offloading copying between files.  The system call and vfs function
> > are relatively light wrappers around the file_operation method that
> > does the heavy lifting.
> >
> > There was interest at LSF in getting the basic infrastructure merged
> > before worrying about adding behavioural flags and more complicated
> > implementations.  This series only offers a refactoring of the btrfs
> > clone ioctl as an example of an implementation of the file
> > copy_file_range method.
> >
> > I've added support for copy_file_range() to xfs_io in xfsprogs and
> > have the start of an xfstest that tests the system call.  I'll send
> > those to fstests@.
> >
> > So how does this look?
> >
> > Do we want to merge this and let the NFS and block XCOPY patches add
> > their changes when they're ready?

This sounds enough like splice that I'm wondering why the API isn't splice.

--Andy
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