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Date:      Wed, 30 Jul 2014 22:46:45 -0700
From:      Xin Li <delphij@delphij.net>
To:        Allan Jude <allanjude@freebsd.org>, delphij@freebsd.org
Cc:        freebsd-fs@freebsd.org, Andriy Gapon <avg@freebsd.org>
Subject:   Re: panic: avl_find() succeeded inside avl_add()
Message-ID:  <53D9D845.3070905@delphij.net>
In-Reply-To: <53D9C306.6060105@freebsd.org>
References:  <53D9C306.6060105@freebsd.org>

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On 7/30/14 9:16 PM, Allan Jude wrote:
> I updated one of our storage servers to the latest -CURRENT
> yesterday and now it is panic'ing every few minutes
> 
> I suspect this is related to r269229 (MFV r269223)
> 
> Jul 31 03:25:23 Tango syslogd: kernel boot file is
> /boot/kernel/kernel Jul 31 03:25:23 Tango kernel: panic: avl_find()
> succeeded inside avl_add() Jul 31 03:25:23 Tango kernel: cpuid = 0 
> Jul 31 03:25:23 Tango kernel: KDB: stack backtrace: Jul 31 03:25:23
> Tango kernel: #0 0xffffffff809ab070 at kdb_backtrace+0x60 Jul 31
> 03:25:23 Tango kernel: #1 0xffffffff8096c3a5 at panic+0x155 Jul 31
> 03:25:23 Tango kernel: #2 0xffffffff819dbc04 at avl_add+0x84 Jul 31
> 03:25:23 Tango kernel: #3 0xffffffff81a04560 at dbuf_create+0x390 
> Jul 31 03:25:23 Tango kernel: #4 0xffffffff81a03f5a at
> dbuf_hold_impl+0x11a Jul 31 03:25:23 Tango kernel: #5
> 0xffffffff81a0467b at dbuf_hold+0x1b Jul 31 03:25:23 Tango kernel:
> #6 0xffffffff81a09593 at dmu_buf_hold_array_by_dnode+0x153 Jul 31
> 03:25:23 Tango kernel: #7 0xffffffff81a0a526 at dmu_read_uio+0x66 
> Jul 31 03:25:23 Tango kernel: #8 0xffffffff81a9bb0a at 
> zfs_freebsd_read+0x58a Jul 31 03:25:23 Tango kernel: #9
> 0xffffffff80eddf11 at VOP_READ_APV+0xa1 Jul 31 03:25:23 Tango
> kernel: #10 0xffffffff80a32427 at vn_read+0x167 Jul 31 03:25:23
> Tango kernel: #11 0xffffffff80a2e5db at vn_io_fault+0x10b Jul 31
> 03:25:23 Tango kernel: #12 0xffffffff809c4a95 at dofileread+0x95 
> Jul 31 03:25:23 Tango kernel: #13 0xffffffff809c47b8 at
> kern_readv+0x68 Jul 31 03:25:23 Tango kernel: #14
> 0xffffffff809c4743 at sys_read+0x63 Jul 31 03:25:23 Tango kernel:
> #15 0xffffffff80db84fb at amd64_syscall+0x3fb Jul 31 03:25:23 Tango
> kernel: #16 0xffffffff80d9a47b at Xfast_syscall+0xfb Jul 31
> 03:25:23 Tango kernel: Uptime: 12m11s
> 
> https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=192284

Can you try reverting r221991?  (Andriy: in r221991 -- why reverting
that portion?)

Cheers,

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