------- Comment on attachment From p...@au1.ibm.com 2016-11-16 16:48 EDT-------
This is the patch set from Zhong Li to fix some races in the XICS emulation code. It would be useful to know if this solves the missing interrupt problem. Since it seems that the problem only shows up when the interrupt affinity is being changed, it would be useful to test with the affinity being changed very frequently, so as to trigger the problem more quickly. ** Attachment added: "Patch from Zhong Li to fix some races in XICS emulation" https://bugs.launchpad.net/bugs/1636330/+attachment/4778345/+files/irq-fix.patch -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1636330 Title: guest experiencing Transmit Timeouts on CX4 Status in linux package in Ubuntu: Fix Released Status in linux source package in Yakkety: Fix Committed Status in linux source package in Zesty: Fix Released Bug description: This patch fixes a race condition that was reintroduced in the 4.8 kernel, as part of the P9 changes, after having been originally fixed in 3.19. The effect of the race condition is that a secondary thread can start trying to execute code from the guest while the thread is still in hypervisor mode, so it can cause many different symptoms, one of which seems to be the timebase corruption that leads to the lockup in ktime_get_ts64. It could cause other problems such as CPU cores locking up hard or memory corruption. This patch is only needed on the host. It should be applied to any 4.8 kernel being used as a host, including the Ubuntu 16.10 kernel. Hi Paul I built a kernel with your patch and put at the host and in the guest. I can still see some ktime_get_ts64 at the host. The guest dmesg is clean. This patch fixes another race condition I found in the fastsleep code. Please apply this patch as well and test. Sure will do and provide feedback. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1636330/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
