On Fri, Jun 04, 2021 at 06:37:49PM +0000, Dexuan Cui wrote: > > From: Dexuan Cui > > Sent: Friday, June 4, 2021 11:17 AM > > > >> ... > > > > I've heard a similar report from Vineeth but we didn't get to the bottom > > > > of this. > > > I have just tried reverting the commit mentioned above and it solves the > > > GUI freeze > > > I was also seeing. Previously, login screen was just freezing, but VM > > > was accessible > > > through ssh. With the above commit reverted, I can login to Gnome. > > > > > > Looks like I am also experiencing the same bug mentioned here. > > > > > > Thanks, > > > Vineeth > > > > As Matthew mentioned, this is a known issue: > > https://lwn.net/ml/linux-kernel/YLZEhv0cpZp8uVE3@xxxxxxxxxxxxxxxxxxxx/ > > > > Matthew has reverted ccf953d8f3d6: > > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id= > > 0b78f8bcf4951af30b0ae83ea4fad27d641ab617 > > so the latest mainline should work now. > > > > Thanks, > > Dexuan > > Hi Matthew, > With today's latest mainline 16f0596fc1d78a1f3ae4628cff962bb297dc908c, > the Xorg works again in Linux VM on Hyper-V, but when I reboot the VM, I > always see a lot of "BUG: Bad page state in process Xorg " warnings (there > are about 60 such warnings) before the VM reboots. > > BTW, I happen to have an older Mar-28 mainline kernel (36a14638f7c0654), > which has the same warnings. > > Any idea which change introduced the warnings? Looks like someone forgot to call fb_deferred_io_cleanup()?
