Re: Occasional VM soft lockup when a remote cdrom is attached

2019-10-14 Thread John Snow
On 10/13/19 10:04 PM, Guoheyi wrote: > Really appreciate your advice. Some comments below: > > > On 2019/10/12 3:06, John Snow wrote: >> >> On 10/11/19 9:22 AM, Guoheyi wrote: >>> Hi folks, >>> >>> We observed Linux on VM occasionally (at very low rate) got soft lockup >>> when a remote cdrom

Re: Occasional VM soft lockup when a remote cdrom is attached

2019-10-13 Thread Guoheyi
Really appreciate your advice. Some comments below: On 2019/10/12 3:06, John Snow wrote: On 10/11/19 9:22 AM, Guoheyi wrote: Hi folks, We observed Linux on VM occasionally (at very low rate) got soft lockup when a remote cdrom is attached. The guest hangs up at below call trace: That's

Re: Occasional VM soft lockup when a remote cdrom is attached

2019-10-11 Thread John Snow
On 10/11/19 9:22 AM, Guoheyi wrote: > Hi folks, > > We observed Linux on VM occasionally (at very low rate) got soft lockup > when a remote cdrom is attached. The guest hangs up at below call trace: > That's certainly a new one to me :) > [Tue Oct8 23:02:53 2019]ata_scsi_queuecmd+0xe0/0x2a0

Occasional VM soft lockup when a remote cdrom is attached

2019-10-11 Thread Guoheyi
Hi folks, We observed Linux on VM occasionally (at very low rate) got soft lockup when a remote cdrom is attached. The guest hangs up at below call trace: [Tue Oct8 23:02:53 2019]ata_scsi_queuecmd+0xe0/0x2a0 [libata] [Tue Oct8 23:02:53 2019]scsi_dispatch_cmd+0xec/0x288 [Tue Oct8 23:02:53