> -----Original Message-----
> From: Ian Jackson <ian.jack...@citrix.com>
> Sent: 27 November 2019 11:10
> To: Durrant, Paul <pdurr...@amazon.com>
> Cc: Ian Jackson <ian.jack...@citrix.com>; George Dunlap
> <george.dun...@citrix.com>; Juergen Gross <jgr...@suse.com>; Stefano
> Stabellini <sstabell...@kernel.org>; Julien Grall <jul...@xen.org>; Wei
> Liu <w...@xen.org>; Paul Durrant <p...@xen.org>; Andrew Cooper
> <andrew.coop...@citrix.com>; Konrad Rzeszutek Wilk
> <konrad.w...@oracle.com>; Marek Marczykowski-Górecki
> <marma...@invisiblethingslab.com>; Hans van Kranenburg <h...@knorrie.org>;
> Jan Beulich <jbeul...@suse.com>; xen-devel@lists.xenproject.org
> Subject: RE: [Xen-devel] [PATCH for-4.13 2/2] Rationalize max_grant_frames
> and max_maptrack_frames handling
>
> Durrant, Paul writes ("RE: [Xen-devel] [PATCH for-4.13 2/2] Rationalize
> max_grant_frames and max_maptrack_frames handling"):
> > > -----Original Message-----
> > > From: Xen-devel <xen-devel-boun...@lists.xenproject.org> On Behalf Of
> Ian
> > > Jackson
> > > I have seen reports of users who ran out of grant/maptrack frames
> > > because of updates to use multiring protocols etc. The error messages
> > > are not very good and the recommended workaround has been to increase
> > > the default limit on the hypervisor command line.
> > >
> > > It is important that we don't break that workaround!
> >
> > Alas it has apparently been broken for several releases now :-(
>
> I guess at least in Debian (where I have seen this) we haven't
> released with any affected versions yet...
I believe the problem was introduce in 4.10, so I think it would be prudent to
also back-port the final fix to stable trees from then on.
Paul
>
> Ian.
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