2017-08-21 21:12+0200, Adam Borowski: > On Mon, Aug 21, 2017 at 09:26:57AM +0800, Wanpeng Li wrote: > > 2017-08-21 7:13 GMT+08:00 Adam Borowski <kilobyte@xxxxxxxxxx>: > > > Hi! > > > I'm afraid I keep getting a quite reliable, but random, splat when running > > > KVM: > > > > I reported something similar before. https://lkml.org/lkml/2017/6/29/64 > > Your problem seems to require OOM; I don't have any memory pressure at all: > running a single 2GB guest while there's nothing big on the host (bloatfox, > xfce, xorg, terminals + some minor junk); 8GB + (untouched) swap. There's > no memory pressure inside the guest either -- none was Linux (I wanted to > test something on hurd, kfreebsd) and I doubt they even got to use all of > their frames. I even tried hurd, but couldn't reproduce ... what is your qemu command line and the output of host's `grep . /sys/module/kvm*/parameters/*`? > Also, it doesn't reproduce for me on 4.12. Great info ... the most suspicious between v4.12 and v4.13-rc5 is the series with dcdca5fed5f6 ("x86: kvm: mmu: make spte mmio mask more explicit"), does reverting it help? `git revert ce00053b1cfca312c22e2a6465451f1862561eab~1..995f00a619584e65e53eff372d9b73b121a7bad5` Thanks.