This bug is awaiting verification that the kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed- zesty' to 'verification-done-zesty'. If the problem still exists, change the tag 'verification-needed-zesty' to 'verification-failed-zesty'.
If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you! ** Tags added: verification-needed-zesty ** Tags added: verification-needed-xenial -- 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/1682644 Title: IPR driver causes multipath to fail paths/stuck IO on Medium Errors Status in linux package in Ubuntu: Triaged Status in linux source package in Xenial: Fix Committed Status in linux source package in Zesty: Fix Committed Bug description: SRU Justification: Impact: stuck I/O to multipath disks with medium errors (on IPR controllers) Fix: upstream commit for IPR driver to allow SCSI layer to handle the error Testcase: perform I/O to a failing disk which is multipathed (on IPR controller), which returns SCSI Medium Errors (without the fix, the I/O gets stuck). the commit message describes a test-case w/ sg_dd. ---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 > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=785a470496d8e0a32e3d39f376984eb2c98ca5b3 Please apply to 17.04 (target 16.04.3 HWE kernel) and 16.04 (GA kernel). Patch already applied to 17.10. 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. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1682644/+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
