Date: Tue, 2 Jun 2009 14:46:50 GMT From: "Mr. Olli" <mister.olli@googlemail.com> To: freebsd-gnats-submit@FreeBSD.org Subject: misc/135178: Xen domU outgoing data transfer stall when TSO is enabled Message-ID: <200906021446.n52Eko4D023308@www.freebsd.org> Resent-Message-ID: <200906021450.n52Eo208039322@freefall.freebsd.org>
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>Number: 135178 >Category: misc >Synopsis: Xen domU outgoing data transfer stall when TSO is enabled >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: Tue Jun 02 14:50:02 UTC 2009 >Closed-Date: >Last-Modified: >Originator: Mr. Olli >Release: 8-CURRENT r193225 >Organization: >Environment: FreeBSD template-8_CURRENT.domain 8.0-CURRENT FreeBSD 8.0-CURRENT #1 r193225: Mon Jun 1 17:18:52 CEST 2009 root@template-8_CURRENT.domain:/usr/obj/usr/src/sys/XEN i386 >Description: Transfering files larger than some size (presumably 2MB) via SSH with FreeBSD XEN para-virt domU stall after transfering 2112kb of data, when domU is source of transfer. SSH transfers with the domU as target work properly. >How-To-Repeat: 1) Enable TSO for xn0 2) transfer data (e.g. kernel file) template-8_CURRENT# ifconfig xn0 tso template-8_CURRENT# scp /boot/kernel/kernel dante@10.30.1.15:/tmp Password: kernel 46% 2112KB 1.4MB/s - stalled -^CKilled by signal 2. template-8_CURRENT# >Fix: As reported by "Anne Marcel Roorda" on freebsd-xen disable TCP Segmentation offloading solves the problem. template-8_CURRENT# ifconfig xn0 -tso template-8_CURRENT# scp /boot/kernel/kernel dante@10.30.1.15:/tmp kernel 100% 4510KB 4.4MB/s 00:00 template-8_CURRENT# >Release-Note: >Audit-Trail: >Unformatted:
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