FreeBSD Errata Notice FreeBSD-EN-15:14.ixgbe
25 August, 2015 by errata-notices@freebsd.org | freebsd
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FreeBSD-EN-15:14.ixgbe Errata Notice
The FreeBSD Project
Topic: Disable ixgbe(4) flow-director support
Category: core
Module: ixgbe
Announced: 2015-08-25
Credits: Marc De La Gueronniere (Verisign, Inc.)
Affects: FreeBSD 10.1
Corrected: 2014-10-11 22:10:39 UTC (stable/10, 10.1-STABLE)
2015-08-25 20:48:58 UTC (releng/10.1, 10.1-RELEASE-p19)
For general information regarding FreeBSD Errata Notices and Security
Advisories, including descriptions of the fields above, security
branches, and the following sections, please visit
<URL:https://security.freebsd.org/>.
I. Background
Flow director is an Intel technology to steer incoming packets in application
aware fashion.
II. Problem Description
Flow director support is not completely/correctly implemented in FreeBSD at
this time.
III. Impact
Enabling flow director support may cause traffic to land on a wrong RX queue
of the NIC, resulting in bad or sub-optimal performance on the receive side.
IV. Workaround
No workaround is available, but systems that do not have Intel(R) 82559
series 10Gb Ethernet Controllers are not affected.
V. Solution
Perform one of the following:
1) Upgrade your system to a supported FreeBSD stable or release / security
branch (releng) dated after the correction date.
2) To update your present system via a binary patch:
Systems running a RELEASE version of FreeBSD on the i386 or amd64
platforms can be updated via the freebsd-update(8) utility:
# freebsd-update fetch
# freebsd-update install
3) To update your present system via a source code patch:
The following patches have been verified to apply to the applicable
FreeBSD release branches.
a) Download the relevant patch from the location below, and verify the
detached PGP signature using your PGP utility.
# fetch https://security.FreeBSD.org/patches/EN-15:14/ixgbe.patch
# fetch https://security.FreeBSD.org/patches/EN-15:14/ixgbe.patch.asc
# gpg --verify ixgbe.patch.asc
b) Apply the patch. Execute the following commands as root:
# cd /usr/src
# patch < /path/to/patch
c) Recompile your kernel as described in
<URL:https://www.FreeBSD.org/handbook/kernelconfig.html> and reboot the
system.
VI. Correction details
The following list contains the correction revision numbers for each
affected branch.
Branch/path Revision
- -------------------------------------------------------------------------
stable/10/ r272967
releng/10.1/ r287146
- -------------------------------------------------------------------------
To see which files were modified by a particular revision, run the
following command, replacing NNNNNN with the revision number, on a
machine with Subversion installed:
# svn diff -cNNNNNN --summarize svn://svn.freebsd.org/base
Or visit the following URL, replacing NNNNNN with the revision number:
<URL:https://svnweb.freebsd.org/base?view=revision&revision=NNNNNN>
VII. References
The latest revision of this Errata Notice is available at
https://security.FreeBSD.org/advisories/FreeBSD-EN-15:14.ixgbe.asc
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