Begin forwarded message: Date: Tue, 20 Nov 2018 07:09:26 +0000 From: bugzilla-dae...@bugzilla.kernel.org To: step...@networkplumber.org Subject: [Bug 201735] New: serial8250: too much work for irq4 https://bugzilla.kernel.org/show_bug.cgi?id=201735 Bug ID: 201735 Summary: serial8250: too much work for irq4 Product: Networking Version: 2.5 Kernel Version: 4.4.0-116-generic Hardware: All OS: Linux Tree: Mainline Status: NEW Severity: high Priority: P1 Component: Other Assignee: step...@networkplumber.org Reporter: rms2...@gmail.com Regression: No Created attachment 279549 --> https://bugzilla.kernel.org/attachment.cgi?id=279549&action=edit LSHW log Virtual machines loosing network access randomly. What happens when issue is present: - Network device on guest machine is lost. It's impossible to access machine. - Virsh console available for connection. PING from affected guest is available but with massive packet loss (20% ~ 70%). - Networking restart from the guest does not resolve problem. - When virsh editing and setting to: <cpu mode='host-passthrough'/> issue seems to be resolved (after reboot). Such issue observed on SUPERMICRO server. LSHW report attached. -- You are receiving this mail because: You are the assignee for the bug.
