Re: [Qemu-devel] [PATCH v7 0/3] 9p: Fix file ID collisions

[Christian Schoenebeck <qemu_oss@crudebyte.com>]

On Dienstag, 8. Oktober 2019 15:47:29 CEST Greg Kurz wrote:
> On Tue, 08 Oct 2019 14:05:28 +0200
> 
> Christian Schoenebeck <qemu_oss@crudebyte.com> wrote:
> > On Dienstag, 8. Oktober 2019 11:14:59 CEST Greg Kurz wrote:
> > > > No, it is not a feature. It is still a fix. :) I cannot use 9p without
> > > > this
> > > > fix at all, so it is not some optional "feature" for me.
> > > 
> > > I understand your need but this is still arguable. The 9p device has
> > > a limitation with cross-device setups. The actual bug is to silently
> > > cause inode number collisions in the guest. This is partly fixed by the
> > > "9p: Treat multiple devices on one export as an error" patch. Thinking
> > > again, it would even make sense to move "remap" from "9p: Added virtfs
> > > option 'multidevs=remap|forbid|warn'" to its own patch. We could then
> > > consider that the bug is fully fixed with "multidevs=forbid|warn".
> > > 
> > > Then comes the "remap" feature which is expected to lift the limitation
> > > with cross-device setups, with a "not yet determined" performance cost
> > > and light reviewing of the code.
> > 
> > Are these patch transfer requests addressed at me to be done?
> 
> It would certainly be appreciated :) and if it happens to be done
> before 2019-10-29, it can even be shipped with QEMU 4.2.

Just to avoid any misapprehension, since today's comments of yours made me 
sceptical: that would be

a) PR for QEMU 4.2 for *all* QID patches up to and including remapping with 
variable suffix (e.g. as -multidevs=x-remap)?

or is your current plan rather 

b) to ship the discussed 9p patches for QEMU 4.2 only up to a certain patch 
like multidevs=warn|forbid and all subsequent patches "might" then be merged 
to master somewhere in distant future?

Best regards,
Christian Schoenebeck