Re: 5.7.0 / BUG: kernel NULL pointer dereference / setup_cpu_watcher

2020-06-05 Thread Christian Kujau
On Fri, 5 Jun 2020, Andrew Cooper wrote: > PVH domains don't have the emulated platform device, so Linux will be > finding ~0 when it goes looking in config space. > > The diagnostic should be skipped in that case, to avoid giving the false > impression that something is wrong. Understood,

Re: 5.7.0 / BUG: kernel NULL pointer dereference / setup_cpu_watcher

2020-06-05 Thread Andrew Cooper
On 05/06/2020 09:36, Christian Kujau wrote: > Hi, > > I'm running a small Xen PVH domain and upgrading from vanilla 5.6.0 to > > > Note: that "Xen Platform PCI: unrecognised magic value" on the top appears > in 5.6 kernels as well, but no ill effects so far. > >

Re: 5.7.0 / BUG: kernel NULL pointer dereference / setup_cpu_watcher

2020-06-05 Thread Christian Kujau
On Fri, 5 Jun 2020, Jürgen Groß wrote: > Do you happen to start the guest with vcpus < maxvcpus? Indeed, I was booting with vcpus=2, maxvcpus=4. Setting both to the same value made the domU boot. > If yes there is already a patch pending for 5.8: >

Re: 5.7.0 / BUG: kernel NULL pointer dereference / setup_cpu_watcher

2020-06-05 Thread Jürgen Groß
On 05.06.20 10:36, Christian Kujau wrote: Hi, I'm running a small Xen PVH domain and upgrading from vanilla 5.6.0 to 5.7.0 caused the splat below, really early during boot. The configuration has not changed, all new "make oldconfig" prompts have been answered with "N". Old and new config, dmesg

5.7.0 / BUG: kernel NULL pointer dereference / setup_cpu_watcher

2020-06-05 Thread Christian Kujau
Hi, I'm running a small Xen PVH domain and upgrading from vanilla 5.6.0 to 5.7.0 caused the splat below, really early during boot. The configuration has not changed, all new "make oldconfig" prompts have been answered with "N". Old and new config, dmesg are here: