On Fri, Dec 04, 2020 at 01:20:54PM +0100, Marek Marczykowski-Górecki wrote: > On Fri, Dec 04, 2020 at 01:08:03PM +0100, Christoph Hellwig wrote: > > On Fri, Dec 04, 2020 at 12:08:47PM +0100, Marek Marczykowski-Górecki wrote: > > > culprit: > > > > > > commit 9e2369c06c8a181478039258a4598c1ddd2cadfa > > > Author: Roger Pau Monne <roger....@citrix.com> > > > Date: Tue Sep 1 10:33:26 2020 +0200 > > > > > > xen: add helpers to allocate unpopulated memory > > > > > > I'm adding relevant people and xen-devel to the thread. > > > For completeness, here is the original crash message: > > > > That commit definitively adds a new ZONE_DEVICE user, so it does look > > related. But you are not running on Xen, are you? > > I am. It is Xen dom0.
I'm afraid I'm on leave and won't be able to look into this until the beginning of January. I would guess it's some kind of bad interaction between blkback and NVMe drivers both using ZONE_DEVICE? Maybe the best is to revert this change and I will look into it when I get back, unless someone is willing to debug this further. Thanks, Roger.
