kern/183753: Regression since r255138: network is slow, kernel: failed to create new mbuf
iz-rpi03 at hs-karlsruhe.de
Thu Nov 7 15:20:01 UTC 2013
>Synopsis: Regression since r255138: network is slow, kernel: failed to create new mbuf
>Arrival-Date: Thu Nov 07 15:20:00 UTC 2013
>Originator: Ralf Wenk
>Release: FreeBSD 10.0-CURRENT arm
Hochschule Karlsruhe, University of Applied Sciences
FreeBSD raspberry-pi 10.0-CURRENT FreeBSD 10.0-CURRENT #0 r255138: Wed Nov 6 08:42:26 CET 2013 root at IZ-FreeBSD1:/usr/obj/arm.armv6/root/rpi/255138/sys/RPI-Bsc arm
While rsync(1)-ing an 1 GB file the RPi gets almost unresponsible after a
while and on the serial console there are lots of
smsc0: warning: failed to create new mbuf
kernel messages. Occasionaly dotted with the
[zone: mbuf_cluster] kern.ipc.nmbclusters limit reached
rsync shows a transfer speed of 27.40kB/s (over DSL) even if the files are
already in sync and only the timestamps differ.
Increasing the value of kern.ipc.nmbclusters by the factor of 2 just delayed
the moment the problem happens.
The first release which shows this is r25518. r255166 and older do not.
rsync shows a transfer speed of 535.46kB/s (over DSL) on r255166 and older
Use a 1GB file as transfer file.
If already transfered touch(1) transfer file at the source host.
rsync -trv --modify-window=1 --compress --progress --stats --inplace --delete transfer_file user at target.host:/path/to/
Await problem around 10% of the file is transfered.
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