[DragonFlyBSD - Bug #3088] Kernel panic in syncache_add

bugtracker-admin at leaf.dragonflybsd.org bugtracker-admin at leaf.dragonflybsd.org
Sun Oct 22 05:38:32 PDT 2017

Issue #3088 has been updated by pa3k.

Thank you!

The server is now running compiled kernel DragonFly v5.0.0.7.gb21cd7-RELEASE for several hours without panic.
I will let the server run for few hours and if nothing happens, I will close this issue as resolved.

This "softdep_sync_metadata_bp(1): caught buf 0xffffff80af235c48 going away" is only informational and nothing to bother,
or is there some deeper issue hidden in?

Bug #3088: Kernel panic in syncache_add

* Author: pa3k
* Status: In Progress
* Priority: Normal
* Assignee: 
* Category: 
* Target version: 
I'm using SuperMicro A1SAi-C2750 as small server with jails that was running fine with latest DragonFly BSD 4.8.1,
but since I upgraded to DragonFly BSD 5.0, I'm experiencing random crashes - always in syncache_add.

Tried also clean install and kernel rebuild,
server is actually running DragonFly v5.0.0.6.g0978b-RELEASE

24 hours of memtest is no problem for this server.
Crash summaries of latest server crashes are attached to this issue. I cannot find a patter how to reliably crash that server,
but core.txt.5 was right after reboot-after-panic while trying to copy core.txt.4 per scp from server.

Any help or hint how to fix or debug this problem is appreciated.

Also - should I be worried to see messages like this:
softdep_sync_metadata_bp(1): caught buf 0xffffff80af383f50 going away
on console?

Thanks in advance.

core.txt.3 (119 KB)
a1sai.txt (35 KB)
dfly.5.0.jpg (47.7 KB)
dfly.5.0.panic.jpg (60.6 KB)
dfly.5.0.trace.jpg (71.6 KB)
core.txt.4 (126 KB)
core.txt.5 (129 KB)

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