[DragonFlyBSD - Bug #3061] HAMMER2. Hang up, reboot, and crash.

[bugtracker-admin at leaf.dragonflybsd.org]

Issue #3061 has been updated by dillon.

Assignee set to dillon

I think I may have fixed this one last night in master (commit id through to a964af6f47472).  I also believe that the stall should be fixed too (19808ac9def).  There was a bug in the flush code that could catch some indirect block management in the middle of moving elements into or out of an indirect block, causing a damaged topology to be committed to media.  This bug self-corrected during a normal shutdown, halt, or reboot, but not if the machine crashes or undergoes a hard reset.

Unfortunately, once damaged, the topology pretty much can't be repaired and the filesystem needs to be newfs_hammer2'd.

So I would say, update, reinstall, and keep watch.  If it happens again with a kernel with a commitid of a964af6f47472 or later then we need to look at it more closely.

-Matt

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Bug #3061: HAMMER2. Hang up, reboot, and crash.
http://bugs.dragonflybsd.org/issues/3061#change-13213

* Author: yellowrabbit2010
* Status: New
* Priority: Normal
* Assignee: dillon
* Category: 
* Target version: 
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I started the build as
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nice -n 9 make -j 8 buildworld
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@USR-SRC is mounted at /usr/scr, @USR-OBJ is mounted at /usr/obj.
The compilation stalled, I pressed reset and after reboot the system dumped immediately. 
After that I was able to boot, but the PFSes were gone.

Each attempt to mount any of them led to the following errors:
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Sep 19 17:23:31 fly kernel: hammer2_mount
Sep 19 17:23:31 fly kernel: hammer2_mount: dev="/dev/serno/WD-WCC2EP295836.s1d" label="USR-OBJ" rdonly=0
Sep 19 17:23:31 fly kernel: hammer2: using volume header #3
Sep 19 17:23:31 fly kernel: alloc spmp 0xffffff8525bc0000 tid 000000000000c00b
Sep 19 17:23:31 fly kernel: chain 00000068a0f4480a.01 key=0000000000000000 meth=31 CHECK FAIL (flags=00144002, bref/data f84c9b21bc9ef301/1e55118462e960c9)
Sep 19 17:23:31 fly kernel: hammer2_mount: error Check Error reading super-root
Sep 19 17:23:31 fly kernel: hammer2_unmount hmp=0xffffff852613a000 mount_count=0
Sep 19 17:23:31 fly kernel: unmount hmp 0xffffff852613a000 remove spmp 0xffffff8525bc0000
Sep 19 17:23:31 fly kernel: unmount hmp 0xffffff852613a000 last ref to PMP=0xffffff8525bc0000
Sep 19 17:23:31 fly kernel: pfsfree: 0xffffff8525bc0000 lrucount=0
Sep 19 17:23:31 fly kernel: hammer2_unmount(A): devvp /dev/serno/WD-WCC2EP295836.s1d rbdirty 0 ronly=0
Sep 19 17:23:31 fly kernel: hammer2_unmount(B): devvp /dev/serno/WD-WCC2EP295836.s1d rbdirty 0
Sep 19 17:23:31 fly kernel: v-chain 0xffffff852613a4c0.255 0000000000000000/0 mir=000000000000c00b
Sep 19 17:23:31 fly kernel: [00002000] (?) refs=1
Sep 19 17:23:31 fly kernel: f-chain 0xffffff852613a640.254 0000000000000000/0 mir=000000000000c00a
Sep 19 17:23:31 fly kernel: [00000004] (?) refs=0
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---Files--------------------------------
core.txt.0 (239 KB)


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