Kernel update to version 4.4.156-94.57 breaks virtualization and multipath.

This document (7023431) is provided subject to the disclaimer at the end of this document.

Environment

SUSE Linux Enterprise Server 12 SP3

Situation

After applying SLES12 SP3 Kernel 4.4.156-94.57-default, any access to multipath devices is refused with an I/O error.

The errors may also be seen when accessing any type of filesystem for example:

kernel: [ 2596.496125] EXT4-fs error: 184 callbacks suppressed
kernel: [ 2596.496131] EXT4-fs error (device vda1) in ext4_reserve_inode_write:5439: Out of memory
kernel: [ 2596.497423] EXT4-fs error (device vda1):

or

kernel: [   36.224474] device-mapper: multipath: Reinstating path 65:16.
kernel: [   36.224743] device-mapper: multipath: Failing path 65:16.
kernel: [   36.224888] device-mapper: multipath: Reinstating path 66:32.
kernel: [   36.225046] device-mapper: multipath: Failing path 66:32.

Resolution

Resolution:

Patch SUSE-SLE-SERVER-12-SP3-2018-2203 was released to address this issue.

The solution to this problem will be to upgrade kernel 4.4.156-94.57, to kernel 4.4.156-94.61.1

Additional Information

Please also note: TID 7023434 - Kernel update to version 4.4.155-94.50.1 / 4.4.156-94.57 breaks XEN virtualization

Disclaimer

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