Re: [Xen-devel] [PATCH v5] libxl: add option for discard support to xl disk configuration

[Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>]

Olaf Hering writes ("Re: [PATCH v5] libxl: add option for discard support to xl 
disk configuration"):
> On Fri, May 09, Olaf Hering wrote:
> > Handle new boolean option discard/no-discard for disk configuration. It
> > is supposed to disable discard support if file based backing storage was
> > intentionally created non-sparse to avoid fragmentation of the file.
> > 
> > The option intended for the backend driver. A new boolean property
> > "discard-enable" is written to the backend node. An upcoming patch for
> > qemu will make use of this property. The kernel blkback driver may be
> > updated as well to disable discard for phy based backing storage.
> 
> Stefano,
> 
> please backport these changes from qemu.git to qemu-xen.git so that
> discard:
> 
> 58da5b1e01a586eb5a52ba3eec342d6828269839 xen_disk: fix io accounting
> f31352041bdde436c3f6d07e1525a42e48dec215 xen_disk: add discard support

Do you mean you want these patches backported from our qemu upstream
to the old ("traditional") xen qemu fork ?

I'm the maintainer for the latter but it's very much in the deep
freeze, maintenance wise.  I don't think we're going to add discard
support to it.

If there's something wrong with the io accounting in it I would
consider a backported patch to fix it.

Thanks,
Ian.

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