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Bug #10956

closed

Panic configuring LAGG+VLAN interfaces when using a kernel with ``INVARIANTS``.

Added by Louis B over 3 years ago. Updated almost 3 years ago.

Status:
Closed
Priority:
Normal
Assignee:
-
Category:
Operating System
Target version:
2.5.2
Start date:
10/05/2020
Due date:
% Done:

0%

Estimated time:
Plus Target Version:
Release Notes:
Force Exclusion
Affected Version:
2.5.0
Affected Architecture:
All

Description

In very recent snapshots I have big problems which seems lagg related. May be related to freebsd issue https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=240609

Please have a look at the attached crash dump

Files

Download all files
textdump.tar(23).0 (74 KB) textdump.tar(23).0 Core dump related to lagg problem Louis B, 10/05/2020 12:56 AM
info(22).0 (438 Bytes) info(22).0 Info related to that Core dump Louis B, 10/05/2020 12:56 AM
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 #1

Updated by Jim Pingle over 3 years ago

  • Priority changed from High to Normal

That's due to INVARIANTS in the kernel which is only a temporary measure to gather information while other issues are being debugged. It's going to be removed shortly.

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 #2

Updated by Jim Pingle over 3 years ago

  • Status changed from New to Feedback
  • Affected Version changed from 2.5.x to 2.5.0

INVARIANTS has been removed from the kernel, try the next new snapshot.

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 #3

Updated by Louis B over 3 years ago

A few minutes ago I updated my system via the GUI to today 1250. The router did restart properly! and seems to work normally.

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 #4

Updated by Jim Pingle over 3 years ago

  • Status changed from Feedback to Resolved
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 #5

Updated by Jim Pingle almost 3 years ago

  • Status changed from Resolved to New
  • Target version changed from 2.5.0 to 2.5.2

A fix has been committed to FreeBSD, we will make sure it gets into 2.5.2.

Author: Gleb Smirnoff <glebius@FreeBSD.org>
Date:   Tue Dec 8 16:46:00 2020 +0000
    The list of ports in configuration path shall be protected by locks,
    epoch shall be used only for fast path.  Thus use LAGG_XLOCK() in
    lagg_[un]register_vlan.  This fixes sleeping in epoch panic.
    PR:             240609
    (cherry picked from commit e1074ed6a08033ee571b4bedb3ffe6049a4a7361)
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 #6

Updated by Jim Pingle almost 3 years ago

  • Subject changed from Problems with laggs in recent snapshots to Panic configuring LAGG+VLAN interfaces when using a kernel with ``INVARIANTS``.
  • Release Notes changed from Default to Force Exclusion

Updating subject but excluding from release notes since it wouldn't affect any potential release, only debugging kernels sometimes present on development snapshots.

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 #7

Updated by Jim Pingle almost 3 years ago

  • Status changed from New to Feedback

The relevant commit for this should be present on a build dated after this comment.

Given the barrier to testing this (requires compiling a custom kernel with INVARIANTS in it), we can just close it after a couple days if there is no feedback.

Testing that LAGG and LAGG+VLANs still work is likely sufficient.

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 #8

Updated by Jim Pingle almost 3 years ago

  • Status changed from Feedback to Closed
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