Date: Fri, 24 Sep 2010 11:34:45 GMT From: Robert Schulze <rs@bytecamp.net> To: freebsd-gnats-submit@FreeBSD.org Subject: misc/150910: wsize=16384 on udp nfs mount unusable Message-ID: <201009241134.o8OBYjiM077546@www.freebsd.org> Resent-Message-ID: <201009241140.o8OBe2Ku003310@freefall.freebsd.org>
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>Number: 150910 >Category: misc >Synopsis: wsize=16384 on udp nfs mount unusable >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: Fri Sep 24 11:40:02 UTC 2010 >Closed-Date: >Last-Modified: >Originator: Robert Schulze >Release: 8.1-RELEASE-p1 >Organization: >Environment: FreeBSD xxxxx 8.1-RELEASE-p1 FreeBSD 8.1-RELEASE-p1 #0: Wed Sep 22 10:38:45 CEST 2010 root@xxxxx:/usr/obj/usr/src/sys/WEB amd64 >Description: Mounting an NFS filesystem with a large value for wsize results in unexpected behaviour. Before analysis, I got strange errors from vi like "close: permission denied" or "no space left on device" when editing a large textfile and having /var/tmp nfs mounted, although there was enough space. The client is 8.1-RELEASE-p1, the server 8.0-RELEASE-p3. Both use nfs version 3. >How-To-Repeat: # mount_nfs -o noatime,udp,wsize=16384 10.0.0.xx:/var/tmp /var/tmp # dd if=/dev/zero of=/var/tmp/foo bs=2M count=100 does not return to prompt # dmesg nfs server 10.0.0.xx:/var/tmp: not responding nfs server 10.0.0.xx:/var/tmp: not responding nfs server 10.0.0.xx:/var/tmp: not responding nfs server 10.0.0.xx:/var/tmp: not responding nfs server 10.0.0.xx:/var/tmp: not responding # top dd in state "nfsaio" # umount -f /var/tmp # mount_nfs -o noatime,udp,wsize=8192 10.0.0.xx:/var/tmp /var/tmp # dd if=/dev/zero of=/var/tmp/foo bs=2M count=100 100+0 records in 100+0 records out 209715200 bytes transferred in 3.897668 secs (53805303 bytes/sec) >Fix: >Release-Note: >Audit-Trail: >Unformatted:
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