Tested kernel in -proposed, version 4.4.0-144-generic (in Xenial). Problem does not reproduce anymore.
I've used tscdeadline_delay test wrote by Thadeu Cascardo as a kvm-unit- tests "module" - this specific test is not upstream yet, Cascardo wrote for this LP in particular and is finishing/polishing before submission. As soon as it gets merged, I'll point the link here for reference. In summary, I ran the test against 4.4.0-143, which gave me this output: $ ./x86/run x86/tscdeadline_delay.flat -smp 1 -cpu host,+tsc-deadline /usr/bin/qemu-system-x86_64 -nodefaults -device pc-testdev -device isa- debug-exit,iobase=0xf4,iosize=0x4 -vnc none -serial stdio -device pci- testdev -machine accel=kvm -kernel x86/tscdeadline_delay.flat -smp 1 -cpu host,+tsc-deadline # -initrd /tmp/tmp.bDXlFhhhBJ enabling apic paging enabled cr0 = 80010011 cr3 = 458000 cr4 = 20 apic version: 50014 PASS: apic existence tsc deadline timer enabled FAIL: delta: 4294968162 SUMMARY: 2 tests, 1 unexpected failures After that, I've rebooted the machine and tested against 4.4.0-144: $ ./x86/run x86/tscdeadline_delay.flat -smp 1 -cpu host,+tsc-deadline /usr/bin/qemu-system-x86_64 -nodefaults -device pc-testdev -device isa- debug-exit,iobase=0xf4,iosize=0x4 -vnc none -serial stdio -device pci- testdev -machine accel=kvm -kernel x86/tscdeadline_delay.flat -smp 1 -cpu host,+tsc-deadline # -initrd /tmp/tmp.qQvOapKgzp enabling apic paging enabled cr0 = 80010011 cr3 = 458000 cr4 = 20 apic version: 50014 PASS: apic existence tsc deadline timer enabled PASS: no large delta SUMMARY: 2 tests ** Tags removed: verification-needed-xenial ** Tags added: verification-done-xenial -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1817918 Title: Hard lockups due to unrestricted lapic timer delay To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1817918/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
