10.0-RC1: bad mbuf leak?
Mark Felder
feld at FreeBSD.org
Wed Jan 8 20:45:31 UTC 2014
On Wed, Jan 8, 2014, at 14:32, Adam McDougall wrote:
> On 01/06/2014 13:32, Mark Felder wrote:
> > It's not looking promising. mbuf usage is really high again. I haven't
> > hit the point where the system is unavailable on the network but it
> > appears to be approaching.
> >
> > root at skeletor:/usr/home/feld # netstat -m
> > 4093391/3109/4096500 mbufs in use (current/cache/total)
> > 1025/1725/2750/1017354 mbuf clusters in use (current/cache/total/max)
> > 1025/1725 mbuf+clusters out of packet secondary zone in use
> > (current/cache)
> > 0/492/492/508677 4k (page size) jumbo clusters in use
> > (current/cache/total/max)
> > 0/0/0/150719 9k jumbo clusters in use (current/cache/total/max)
> > 0/0/0/84779 16k jumbo clusters in use (current/cache/total/max)
> > 1025397K/6195K/1031593K bytes allocated to network (current/cache/total)
> > 0/0/0 requests for mbufs denied (mbufs/clusters/mbuf+clusters)
> > 0/0/0 requests for mbufs delayed (mbufs/clusters/mbuf+clusters)
> > 0/0/0 requests for jumbo clusters delayed (4k/9k/16k)
> > 0/0/0 requests for jumbo clusters denied (4k/9k/16k)
> > 0 requests for sfbufs denied
> > 0 requests for sfbufs delayed
> > 0 requests for I/O initiated by sendfile
> >
> > root at skeletor:/usr/home/feld # vmstat -z | grep mbuf
> > mbuf_packet: 256, 6511065, 1025, 1725, 9153363, 0,
> > 0
> > mbuf: 256, 6511065, 4092367, 1383,74246554, 0,
> > 0
> > mbuf_cluster: 2048, 1017354, 2750, 0, 2750, 0,
> > 0
> > mbuf_jumbo_page: 4096, 508677, 0, 492, 2655317, 0, 0
> > mbuf_jumbo_9k: 9216, 150719, 0, 0, 0, 0, 0
> > mbuf_jumbo_16k: 16384, 84779, 0, 0, 0, 0, 0
> > mbuf_ext_refcnt: 4, 0, 0, 0, 0, 0, 0
> >
> > root at skeletor:/usr/home/feld # uptime
> > 12:30PM up 15:05, 1 user, load averages: 0.24, 0.23, 0.27
> >
> > root at skeletor:/usr/home/feld # uname -a
> > FreeBSD skeletor.feld.me 10.0-PRERELEASE FreeBSD 10.0-PRERELEASE #17
> > r260339M: Sun Jan 5 21:23:10 CST 2014
> > _______________________________________________
> > freebsd-stable at freebsd.org mailing list
> > http://lists.freebsd.org/mailman/listinfo/freebsd-stable
> > To unsubscribe, send any mail to "freebsd-stable-unsubscribe at freebsd.org"
> >
>
> Can you try your NFS mounts from directly within the jails, or stop one
> or more jails for a night and see if it becomes stable? Anything else
> unusual besides the jails/nullfs such as pf, ipfw, nat, vimages? My
> systems running 10 seem fine including the one running poudriere builds
> which uses jails and I think nullfs, but not nfs. Do mbufs go up when
> you cause nfs traffic?
>
You can't do NFS mounts from within a jail, which is why I have to do it
this way.
Nothing else unusual. Very few services running. The box sits mostly
idle and the traffic is light -- watching some TV shows (the jail runs
Plex Media Server). I haven't been able to locate a reason for the mbufs
to go up, but often a wake up in the morning after it has been doing
nothing all night and see it made a large jump in mbufs used. When I'm
running an 11-CURRENT kernel these problems do not exist.
More information about the freebsd-stable
mailing list