Precisation: patch seems to be in linus tree (for version 3.20) at least since 10 Feb 2015:
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/log/?qt=grep&q =xen-blkback%3A+safely+unmap+grants -- 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/1438677 Title: dom0 kernel panic - xen_blkbk_unmap+0x5c/0x2f0 [xen_blkback] Status in linux package in Ubuntu: Triaged Bug description: Current stable kernel is affected by an issue that happens when releasing grants. It is a communication issue between dom0 and domU and there is a temptative patch upstream (konrad's tree) that might fix the issue: https://git.kernel.org/cgit/linux/kernel/git/konrad/xen.git/patch/?id=c43cf3ea838541ea9f066f4f1aa7b197cba6276e (also in attachment) I have not been able to backport this patch on top of current 3.13.0-48 sources. When this panic is triggered (on a server for example), there is a complete dom0 kernel crash (as documented by attachment log) with data & services loss. /proc/version_signature: Ubuntu 3.13.0-48.80-generic 3.13.11-ckt16 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1438677/+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
