[issue1806] DFBSD 2.7.3 - mbuf exhausted while rsync to a NFS

[Antonio Huete Jimenez (via DragonFly issue tracker)]

New submission from Antonio Huete Jimenez <tuxillo at quantumachine.net>:

I got two virtual machines running DFBSD. One is KVM (512MB mem) and the other
one is under VMware (1024MB).

kvm is the NFS server which is exporting /usr like this:
/usr -alldirs -maproot=root: -network ....

>From the vmware I mount it, and start copying the repo using rsync:

# rsync -av -progress /usr/src /mnt/target/usr/

After a while the following warning appears in the kvm (NFS server):
Warning, objcache(mbuf): Exhausted!

# netstat -m
9056/9056 mbufs in use (current/max):
134/4528 mbuf clusters in use (current/max)
          9190 mbufs and mbuf clusters allocated to data
2532 Kbytes allocated to network (22% of mb_map in use)
163 requests for memory denied
0 requests for memory delayed
0 calls to protocol drain routines


In the client part the copy stops:

dfbsd/.git/objects/pack/pack-eb16b18282ea58f39f353cb1c7e4786cfa544159.pack
    24084480  10%    4.10MB/s    0:00:48
rsync: writefd_unbuffered failed to write 4 bytes to socket [sender]: Broken
pipe (32)
rsync: write failed on
"/mnt/remote/dfbsd/.git/objects/pack/pack-eb16b18282ea58f39f353cb1c7e4786cfa544159.pack":
RPC struct is bad (72)
rsync error: error in file IO (code 11) at receiver.c(302) [receiver=3.0.7]
[sender] io timeout after 30 seconds -- exiting
rsync error: timeout in data send/receive (code 30) at io.c(140) [sender=3.0.7]
[vmware] /usr/src> 

And I can't even ssh from outside the kvm machine:
% ssh 192.168.3.100
antonioh at 192.168.3.100's password: 
Timeout, server not responding.
%

----------
messages: 8791
nosy: tuxillo
priority: bug
status: unread
title: DFBSD 2.7.3 - mbuf exhausted while rsync to a NFS

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