Re: WARNING: at arch/x86/kvm/../../../virt/kvm/kvm_main.c:3156 mark_page_dirty_in_slot

[Sean Christopherson]

On Tue, Mar 29, 2022, Naresh Kamboju wrote:
> While running kselftest kvm test cases on x86_64 devices the following
> kernel warning was reported.

...

> [   62.510388] ------------[ cut here ]------------
> [   62.515064] WARNING: CPU: 1 PID: 915 at
> arch/x86/kvm/../../../virt/kvm/kvm_main.c:3156
> mark_page_dirty_in_slot+0xba/0xd0
> [   62.525968] Modules linked in: x86_pkg_temp_thermal fuse
> [   62.531307] CPU: 1 PID: 915 Comm: hyperv_clock Not tainted 5.17.0 #1
> [   62.537691] Hardware name: Supermicro SYS-5019S-ML/X11SSH-F, BIOS
> 2.0b 07/27/2017
> [   62.545185] RIP: 0010:mark_page_dirty_in_slot+0xba/0xd0

Long known issue.  I think we're all waiting for someone else to post an actual
patch.

Vitaly, can you formally post the below patch, or do you need feedback first?

https://lore.kernel.org/all/874k51eddp.fsf@xxxxxxxxxx/