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Date:      Tue, 2 Feb 2016 23:53:40 +0100
From:      Christian Walther <cptsalek@gmail.com>
To:        current@freebsd.org
Subject:   Occasional crashes, Bug or dying disk?
Message-ID:  <CAFyeNf8uHfDEpLR%2BQN78RuAYqb-p=E4BJ=y9%2BY1e3bdey-CyMg@mail.gmail.com>

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Hello list,

since updating the current installation on my trusty Thinkpad T43 I
keep getting occasional crashes like the following:

#1  0xc0c23a03 in kern_reboot (howto=260)
    at /usr/src/sys/kern/kern_shutdown.c:364
#2  0xc0c23f3d in vpanic (fmt=<value optimized out>, ap=<value optimized out>)
    at /usr/src/sys/kern/kern_shutdown.c:757
#3  0xc0c23f5b in panic (fmt=0xc1590fad "ffs_blkfree_cg: freeing free frag")
    at /usr/src/sys/kern/kern_shutdown.c:688
#4  0xc0eb467a in ffs_blkfree_cg (ump=0xc7e11000, fs=0xc7e120d4,
    devvp=<value optimized out>, bno=32075253, size=<value optimized out>,
    inum=<value optimized out>, dephd=<value optimized out>)
    at /usr/src/sys/ufs/ffs/ffs_alloc.c:2237
#5  0xc0eb0b27 in ffs_blkfree (ump=0x0, fs=0x0, devvp=0xc7abdc34,
    bno=32075253, size=4096, vtype=<value optimized out>,
    dephd=<value optimized out>) at /usr/src/sys/ufs/ffs/ffs_alloc.c:2343
#6  0xc0edea9a in freework_freeblock (freework=<value optimized out>)
    at /usr/src/sys/ufs/ffs/ffs_softdep.c:7749
#7  0xc0ed1f85 in handle_workitem_freeblocks (freeblks=0xc76a5d00, flags=512)
    at /usr/src/sys/ufs/ffs/ffs_softdep.c:7803
#8  0xc0eda341 in process_worklist_item (mp=<value optimized out>)
    at /usr/src/sys/ufs/ffs/ffs_softdep.c:1799
#9  0xc0ec5d5f in softdep_process_worklist (mp=0xc7d8fd20, full=0)
    at /usr/src/sys/ufs/ffs/ffs_softdep.c:1593
#10 0xc0eca3ee in softdep_flush (addr=0xc7d8fd20)
    at /usr/src/sys/ufs/ffs/ffs_softdep.c:1395
#11 0xc0be7c9e in fork_exit (callout=0xc0eca310 <softdep_flush>)
    at /usr/src/sys/kern/kern_fork.c:1010
#12 0xc1162d50 in fork_trampoline () at /usr/src/sys/i386/i386/exception.s:287

I wonder if this might be a bug in FFS or a related subsystem, or my
hard disk dying. smartctl lists several READ DMA und WRITE DMA related
errors.
Appears to be related to Bug 132960, which might celebrate it's 10th
birthday soon. ;)


Any ideas?


Best wishes,
Christian Walther



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