On Tue, May 30, 2023, Fabio Coatti wrote: > Il giorno dom 28 mag 2023 alle ore 14:44 Bagas Sanjaya > <bagasdotme@xxxxxxxxx> ha scritto: > > #regzbot ^introduced: v6.3.1..v6.3.2 > > #regzbot title: WARNING trace at kvm_nx_huge_page_recovery_worker when opening a new tab in Chrome > > Out of curiosity, I recompiled 6.3.4 after reverting the following > commit mentioned in 6.3.2 changelog: > > commit 2ec1fe292d6edb3bd112f900692d9ef292b1fa8b > Author: Sean Christopherson <seanjc@xxxxxxxxxx> > Date: Wed Apr 26 15:03:23 2023 -0700 > KVM: x86: Preserve TDP MMU roots until they are explicitly invalidated > commit edbdb43fc96b11b3bfa531be306a1993d9fe89ec upstream. > > And the WARN message no longer appears on my host kernel logs, at > least so far :) Hmm, more than likely an NX shadow page is outliving a memslot update. I'll take another look at those flows to see if I can spot a race or leak. > > Fabio, can you also check the mainline (on guest)? > > Not sure to understand, you mean 6.4-rcX? I can do that, sure, but why > on guest? Misunderstanding probably? Please do test with 6.4-rcX on the host. I expect the WARN to reproduce there as well, but if it doesn't then we'll have a very useful datapoint.
