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Subject: [Bug 193984] New: SMBFS transfer very slow and sometimes hangs
 indefinitely
Date: Sun, 28 Sep 2014 06:47:32 +0000
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X-Bugzilla-Type: new
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X-Bugzilla-Product: Base System
X-Bugzilla-Component: misc
X-Bugzilla-Version: 10.0-RELEASE
X-Bugzilla-Keywords: 
X-Bugzilla-Severity: Affects Many People
X-Bugzilla-Who: jean.m.cyr@gmail.com
X-Bugzilla-Status: Needs Triage
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=193984

            Bug ID: 193984
           Summary: SMBFS transfer very slow and sometimes hangs
                    indefinitely
           Product: Base System
           Version: 10.0-RELEASE
          Hardware: i386
                OS: Any
            Status: Needs Triage
          Severity: Affects Many People
          Priority: ---
         Component: misc
          Assignee: freebsd-bugs@FreeBSD.org
          Reporter: jean.m.cyr@gmail.com

Server is MS Server 2012, clients are FreeBSD Web 10.0-RELEASE-p9 FreeBSD
10.0-RELEASE-p9.

Copy of large file from server does not exceed 1Mbps over wired GigE. Similar
FreeBSD 8 and Linux boxes achieve 20-30Mbps under same conditions. All NICs are
Intel and have auto-negotiated to GigE.

Hanging FreeBSD 10 permanently (requires power down, reboot command hangs) can
be reproduced as follows:

Copy three large folders recursively in parallel. ie:

cp -R /mnt/SRVR2012/a ~/a &
cp -R /mnt/SRVR2012/b ~/b &
cp -R /mnt/SRVR2012/c ~/c &

Mount done using standard mount_smbfs command.

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