[MooseFS-Users] Memory leak with FUSE on mfs 1.6.26-1 ???

[<pu...@go...>]

Hi,
I've got a pair of servers running mfs-1.6.26-1.el6.rf.x86_64
for 10 months now, one is head/chunkserver/mfs-client, the other is
chunkserver/head standby/metalogger.
Worked fine until the CentOS update:
just a few weeks ago the servers were upgraded
from CentOS 6.4 to 6.6, and since then there is a problem with the
memory consumption of the mfsmount/FUSE.
Strange facts: kernel was NOT updated (due to a problem with DRBD-module)
the FUSE-libs were also not updated, mfs-package is also the same as before.
But only within 24 hours, sometimes 5 days, the memory for the mfsmount goes
up to the max of the server's RAM, then is killed by the kernel (OOM).

Watching the PID of mfsmount with pmap showed that it allocates more memory
over
time, as the number of allocated memory-chunks is increasing:
watch "pmap $(pidof mfsmount)|grep anon|wc -l"
In just 4 hours, this number goes up from 100 to 400, while allocating 4G
memory.

Any ideas?

Kernel:
2.6.32-431.23.3.el6.x86_64 #1 SMP Thu Jul 31 17:20:51 UTC 2014

FUSE:
fuse-libs-2.8.3-4.el6.x86_64
fuse-2.8.3-4.el6.x86_64

mount:
mfsmount                /home                   fuse
mfsmaster=mfsmaster,_netdev,noatime,nodev,nosuid,noexec 0 0