Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: linux-signed (Ubuntu)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/1850860
Title:
5.0.0-32.34 causes system instability with cephfs
Status in linux-signed package in Ubuntu:
Confirmed
Bug description:
On Ubuntu 18.04
linux-image-5.0.0-32-generic 5.0.0-32.34~18.04.2
According to https://www.mail-archive.com/ceph-
us...@ceph.io/msg00940.html the same happens on Disco with this kernel
version.
Processes that read data from CephFS get stuck, the system becomes
unstable. dmesg contains messages like this:
[ 1510.703090] cache_from_obj: Wrong slab cache. inode_cache but object is
from ceph_inode_info
[ 1510.711590] cache_from_obj: Wrong slab cache. inode_cache but object is
from ceph_inode_info
[ 1510.720093] cache_from_obj: Wrong slab cache. inode_cache but object is
from ceph_inode_info
[ 1510.728592] cache_from_obj: Wrong slab cache. inode_cache but object is
from ceph_inode_info
[ 1510.737086] cache_from_obj: Wrong slab cache. inode_cache but object is
from ceph_inode_info
[ 1510.745587] cache_from_obj: Wrong slab cache. inode_cache but object is
from ceph_inode_info
[ 1510.754080] cache_from_obj: Wrong slab cache. inode_cache but object is
from ceph_inode_info
According to the discussion here: https://github.com/coreos/bugs/issues/2616
this is caused by a faulty patch. If that information is correct the
problematic
patch should be
https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/disco/commit/?id=100a8eb40c492f2525cdae434c50d53ec7f5cc23
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