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Date:      Sun, 06 Nov 2016 22:14:47 +0000
From:      bugzilla-noreply@freebsd.org
To:        freebsd-net@FreeBSD.org
Subject:   [Bug 213257] Crash in IGB driver with ALTQ
Message-ID:  <bug-213257-2472-3MFQPYJeBy@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-213257-2472@https.bugs.freebsd.org/bugzilla/>
References:  <bug-213257-2472@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D213257

nicolas@deffayet.com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |nicolas@deffayet.com

--- Comment #9 from nicolas@deffayet.com ---
I confirm this bug on FreeBSD 11.0 RELEASE. Only igb interfaces are affecte=
d as
the issue don't occur with host using em instead of igb interfaces.

The crash seem to be related to a certain type and amount of packets.
Removing ALTQ support from kernel fix the issue.

It seem to be related to r303174. ALTQ seem to have not been supported with=
 igb
interface according https://forums.freebsd.org/threads/48283/ and
https://lists.freebsd.org/pipermail/freebsd-pf/2016-August/008217.html

I suggest to test with r303174 removed:
---
--- head/sys/dev/e1000/if_igb.h 2016/03/22 12:40:09     297187
+++ head/sys/dev/e1000/if_igb.h 2016/05/06 15:41:38     299182
@@ -35,6 +35,10 @@
 #ifndef _IF_IGB_H_
 #define _IF_IGB_H_

-#ifdef ALTQ
-#define IGB_LEGACY_TX
-#endif
-
 #include <sys/param.h>
 #include <sys/systm.h>
 #ifndef IGB_LEGACY_TX
---

Did you have the same issue with msix disabled ?
sysctl -w hw.pci.enable_msix=3D0

Not sure if this is true but MSI-IX and ALTQ seem to be incompatible.

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