Date: Thu, 7 Nov 2013 15:13:53 GMT From: Ralf Wenk <iz-rpi03@hs-karlsruhe.de> To: freebsd-gnats-submit@FreeBSD.org Subject: kern/183753: Regression since r255138: network is slow, kernel: failed to create new mbuf Message-ID: <201311071513.rA7FDrnS026739@oldred.freebsd.org> Resent-Message-ID: <201311071520.rA7FK0R8042991@freefall.freebsd.org>
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>Number: 183753 >Category: kern >Synopsis: Regression since r255138: network is slow, kernel: failed to create new mbuf >Confidential: no >Severity: non-critical >Priority: low >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Thu Nov 07 15:20:00 UTC 2013 >Closed-Date: >Last-Modified: >Originator: Ralf Wenk >Release: FreeBSD 10.0-CURRENT arm >Organization: Hochschule Karlsruhe, University of Applied Sciences >Environment: FreeBSD raspberry-pi 10.0-CURRENT FreeBSD 10.0-CURRENT #0 r255138: Wed Nov 6 08:42:26 CET 2013 root@IZ-FreeBSD1:/usr/obj/arm.armv6/root/rpi/255138/sys/RPI-Bsc arm >Description: 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 kernel message. 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 releases. >How-To-Repeat: 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@target.host:/path/to/ Await problem around 10% of the file is transfered. >Fix: Undo r255138. >Release-Note: >Audit-Trail: >Unformatted:
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