[DragonFlyBSD - Bug #2898] HAMMER panic

[bugtracker-admin at leaf.dragonflybsd.org]

Issue #2898 has been updated by tkusumi.


i'm suspecting a possible race here, but need to look into more details.
no one has really touched related code since 4.4.

hammer_rel_mem_record()
>  412                         if (record->flags & HAMMER_RECF_ONRBTREE) {
>  413                                 RB_REMOVE(hammer_rec_rb_tree,
>  414                                           &ip->rec_tree,
>  415                                           record);
>  416                                 record->flags &= ~HAMMER_RECF_ONRBTREE;
>  417                                 KKASSERT(ip->rsv_recs > 0);
>  418                                 if (RB_EMPTY(&ip->rec_tree)) {
>  419                                         ip->flags &= ~HAMMER_INODE_XDIRTY;
>  420                                         ip->sync_flags &= ~HAMMER_INODE_XDIRTY;
>  421                                 }


----------------------------------------
Bug #2898: HAMMER panic
http://bugs.dragonflybsd.org/issues/2898#change-12855

* Author: pavalos
* Status: New
* Priority: Normal
* Assignee: 
* Category: 
* Target version: 
----------------------------------------
panic: assertion "(RB_EMPTY(&ip->rec_tree) && (ip->flags & HAMMER_INODE_XDIRTY) == 0) || (!RB_EMPTY(&ip->rec_tree) && (ip->flags & HAMMER_INODE_XDIRTY) != 0)" failed in hammer_flush_inode_done at /usr/src/sys/vfs/hammer/hammer_inode.c:2577
cpuid = 0
Trace beginning at frame 0xffffffe78639e910
panic() at panic+0x261 0xffffffff802e31ee
panic() at panic+0x261 0xffffffff802e31ee
hammer_flush_inode_done() at hammer_flush_inode_done+0x111 0xffffffff80424e68
hammer_flusher_flush_inode() at hammer_flusher_flush_inode+0x7a 0xffffffff8041f24a
hammer_fls_rb_tree_RB_SCAN() at hammer_fls_rb_tree_RB_SCAN+0xfc 0xffffffff8041e39e
hammer_flusher_slave_thread() at hammer_flusher_slave_thread+0x7a 0xffffffff8041e4d2

DragonFly ylem.theshell.com 4.5-DEVELOPMENT DragonFly v4.5.0.681.g2e03c8-DEVELOPMENT #2: Sat Mar 19 15:37:05 PDT 2016     root at ylem.theshell.com:/usr/obj/usr/src/sys/YLEM64  x86_64

It didn’t crash dump—any ideas?

Peter



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