[DragonFlyBSD - Bug #2647] (New) HAMMER panic on 3.6.0

[bugtracker-admin at leaf.dragonflybsd.org]

Issue #2647 has been reported by tuxillo.

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Bug #2647: HAMMER panic on 3.6.0
http://bugs.dragonflybsd.org/issues/2647

* Author: tuxillo
* Status: New
* Priority: Normal
* Assignee: 
* Category: VFS subsystem
* Target version: 3.8.0
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Hi,

I've had the following panic on my NAS after checking out our tree and directly starting a build:
No dump is available.

panic: hammer_sync_record_callback: illegal add during inode deletion record 0xffffffe0d21199070
cpuid = 0
Trace beginning at frame 0xffffffe0cdd47770
panic at panic+0x223 0xffffffff80561c0c
panic at panic+0x223 0xffffffff80561c0c
hammer_sync_record_callback() at hammer_sync_record_callback+0x11f 0xffffffff8075f278
hammer_rec_rb_tree_RB_SCAN() at hammer_rec_rb_tree_RB_SCAN+0xf9 0xffffffff8076a755
hammer_sync_inode() at hammer_sync_inode+0x282 0xffffffff80761ffb 
hammer_flusher_flush_inode() at hammer_flusher_flush_inode+0x62 0xffffffff8075e50c
hammer_fls_rb_tree_RB_SCAN() at hammer_fls_rb_tree_RB_SCAN+0x100 0xffffffff8075d1f4
hammer_flusher_slave_thread() at hammer_flusher_slave_thread+0x7a 0xffffffff8075d2e3
Debugger("panic")

CPU0 stopping CPUs: 0x00000002
 stopped
Stopped at     Debugger+0x38:    movb   $0,0x8945f2(%rip)
db>

The following comment enclose the if where the panic is hit.

* XXX There may be a case with RECORD_ADD with DELETED_FE set
* that we currently panic on.

Not sure if that's relevant.

Cheers,
Antonio Huete



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