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

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

[Michael Kerrisk]

[CC += linux-api-u79uwXL29TY76Z2rM5mHXA@public.gmane.org]

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-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, 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-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org> 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?
>
> - z
>
> --
> To unsubscribe from this list: send the line "unsubscribe linux-nfs" in
> the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html



-- 
Michael Kerrisk Linux man-pages maintainer;
http://www.kernel.org/doc/man-pages/
Author of "The Linux Programming Interface", http://blog.man7.org/

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

[Andy Lutomirski]

On May 6, 2015 11:45 AM, "Michael Kerrisk" <mtk.manpages@gmail.com> wrote:
>
> [CC += linux-api@vger.kernel.org]
>
> 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@vger.kernel.org, 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@redhat.com> 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