Public bug reported: ---Problem Description--- IPR driver causes multipath to fail paths/stuck IO on Medium Errors
This problem is resolved with this upstream accepted patch, scheduled for 4.11. The detailed problem description and resolution are described in the commit message. > scsi: ipr: do not set DID_PASSTHROUGH on CHECK CONDITION > http://git.kernel.org/?p=linux/kernel/git/jejb/scsi.git;a=commit;h=785a470496d8e0a32e3d39f376984eb2c98ca5b3 Please apply to 17.04 and 16.04. The business justification for the SRU is: Clients with a dual-controller multipathed IPR configuration that eventually runs into failing disk/sectors, will experience an I/O hang once the drive reports a Medium Error, which can hang an application or even the root filesystem (whatever is doing I/O to the failing drive), potentially hanging the system. Thanks. ---Additional Hardware Info--- Dual (IPR) controller setup, multipath enabled ---Steps to Reproduce--- 1) Use a disk with bad sectors (or force such condition, via internal/special tools) 2) Multipath that disk 3) Run IO to the multipath device on the bad sectors 4) Both paths will be failed, and IO is stuck due to queue_if_no_path (enabled by default for IPR) The detailed problem description and resolution are described in the commit message. ** Affects: linux (Ubuntu) Importance: Undecided Assignee: Taco Screen team (taco-screen-team) Status: New ** Tags: architecture-ppc64le bugnameltc-153445 severity-critical targetmilestone-inin16043 ** Tags added: architecture-ppc64le bugnameltc-153445 severity-critical targetmilestone-inin16043 ** Changed in: ubuntu Assignee: (unassigned) => Taco Screen team (taco-screen-team) ** Package changed: ubuntu => linux (Ubuntu) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1682644 Title: IPR driver causes multipath to fail paths/stuck IO on Medium Errors To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1682644/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
