Date: Sat, 31 Dec 2016 15:39:32 +0100 From: Julien Cigar <julien@perdition.city> To: freebsd-fs@FreeBSD.org Subject: nfsuserd + jails mbufs leak ? Message-ID: <20161231143932.GS15696@mordor.lan>
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Hello,
I just upgraded a bunch of machines from 10.0 to 10.3. Those machines
have a lot of jails with NFS shares (mounted on the HOST), for example:
jcigar@HOST:~/ > mount|grep -i 'filer'
filer.prod.lan:/pictures/collections on
/usr/jails/www2/filer/pictures/collection (nfs, read-only, nfsv4acls)
filer.prod.lan:/webapps on /usr/jails/www2/filer/webapps (nfs,
nfsv4acls)
filer.prod.lan:/documents on /usr/jails/www2/filer/documents (nfs,
read-only, nfsv4acls)
filer.prod.lan:/apache on /usr/jails/www2/filer/apache (nfs, nfsv4acls)
filer.prod.lan:/geoserver on /usr/jails/java2/filer/geoserver (nfs,
nfsv4acls)
HOSTs and NFS server have vfs.nfsd.server_min_nfsvers=3D4
vfs.nfsd.server_max_nfsvers=3D4 (but it's probably not related to the
problem) and nfsuserd is runnings on each HOST (with no special
${nfsuserd_flags})
On the hosts since I upgraded to 10.3 I'm seeing tons of:
Dec 31 14:29:33 duvel nfsuserd:[675]: req from ip=3D0xc0a80a21 port=3D618
It is not clear to me yet why I'm getting this, but from what I=20
understand it's because requests are not coming from 127.0.0.1 but from
the jail ip (192.168.10.x in my case).. Parallel to this I'm observing a
constant increase of mbufs usage so that at some point in time I'm
getting an exhaustion of mbufs:
[zone: mbuf] kern.ipc.nmbufs limit reached
=2E. and the HOST needs a reboot :(
If I'm stopping nfsuserd I don't see any mbuf leakage anymore
Any idea ? :)
Thanks,
Julien
--=20
Julien Cigar
Belgian Biodiversity Platform (http://www.biodiversity.be)
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