Based on inspecting the ZFS source code, this looks like a ZFS inode
where there is a mismatch between the claimed size of the inode's (ZFS)
ACL and how it's stored. If you're willing to do some work, it might be
possible to narrow this down to identify a specific inode and what's
wrong with it, wh
Public bug reported:
Since updating to kernel 5.15.0-46-generic (package version
5.15.0-46.49), all of our Ubuntu 22.04 LTS servers are leaking kernel
memory; our first server with 8 GB of RAM just fatally OOMed, causing us
to detect this. Inspection of OOM reports, /proc/meminfo, and
/proc/slabin
This is happening on a server and I cannot persuade it to run apport-
collect in any useful way; it fails both with and without forwarded X
(where lynx is started but apparently is incompatible with Launchpad for
authorizing machines). I can attach specific information if necessary.
As an update,
I would be happy to attach logs or other information from this system or
any of our other systems, many of which are still being affected by this
bug until we reboot them.
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ht
We've seen this on a wide variety of workloads, including general user
logins with NFS mounts, SLURM head and cluster nodes, a
Prometheus/Grafana server, a Grafana Loki server, two Exim servers, a
Samba server, LDAP servers, Matlab license servers, and a monitoring
machine that just runs conserver.
It appears that the combination of our audit rules being enabled and
apparmor=0 is what triggers the leak. My test case is repeatedly
compiling Go from source and running its self tests (cloning
https://go.googlesource.com/go, then 'cd go/src; while true; do
./all.bash; done'). On a VM configured a
I booted the "stock" VM with slub_nomerge and after two hours of uptime
(and constant Go compilation and testing), the top counts in slabtop for
active objects and memory use are:
OBJS ACTIVE USE OBJ SIZE SLABS OBJ/SLAB CACHE SIZE NAME
536896 536869 99%2.00K 33556
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