Sorry , mail got bounced. Sending again From: Suresh Gumpula <suresh.gumpula@xxxxxxxxxxx> Date: Sunday, April 5, 2020 at 1:40 PM To: "kvm@xxxxxxxxxxxxxxx" <kvm@xxxxxxxxxxxxxxx>, "pbonzini@xxxxxxxxxx" <pbonzini@xxxxxxxxxx> Subject: Re: ata driver loading hang on qemu/kvm The guest kernel(not a nested guest) boot iso is hanging with following errors. [ 1.414035] Write protecting the kernel read-only data: 6144k [ 1.418006] Freeing unused kernel memory: 1080K [ 1.423033] Freeing unused kernel memory: 1004K [ 1.466783] scsi host0: ata_piix [ 1.469539] scsi host1: ata_piix [ 1.472039] ata1: PATA max MWDMA2 cmd 0x1f0 ctl 0x3f6 bmdma 0xc300 irq 14 [ 1.475740] ata2: PATA max MWDMA2 cmd 0x170 ctl 0x376 bmdma 0xc308 irq 15 We have enabled nested host, but not running any nested guests. So it’s a regular guest VM on a host. Can someone please guide me what could be wrong here. Is it a known issue in the kvm module or qemu emulation of IDE/CDROM controller? Thanks, Suresh From: Suresh Gumpula <suresh.gumpula@xxxxxxxxxxx> Date: Sunday, April 5, 2020 at 1:35 PM To: "kvm@xxxxxxxxxxxxxxx" <kvm@xxxxxxxxxxxxxxx>, "pbonzini@xxxxxxxxxx" <pbonzini@xxxxxxxxxx> Subject: ata driver loading hang on qemu/kvm Hi, Hope you are doing great. I am seeing this old problem with qemu 2.12/kernel 4.19.84(intel kvm with nesting enabled) and guest kernel 4.10 https://bugzilla.redhat.com/show_bug.cgi?id=1345964 Could you please advise me on this? I am seeing the exact same problem where the ata driver load was stuck. Really appreciate if you could give some pointers? Thanks, Suresh
