On Mon, 14 Oct 2013, Andriy Gapon wrote:

on 14/10/2013 03:34 Keith White said the following:
I get the following assert failure with a recent current:

panic: solaris assert: dn->dn_datablkshift != 0, file:
/usr/src/sys/modules/zfs/../../cddl/contrib/opensolaris/uts/common/fs/zfs/dmu_tx.c,
line: 638

Please see https://www.illumos.org/issues/4188
The current best known fix is to simply drop the assertion.
...

Thanks!  It works for me.   Receive completes, and filesystems compare the same.

Index: /usr/src/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dmu_tx.c
===================================================================
--- /usr/src/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dmu_tx.c    
(revision 256304)
+++ /usr/src/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dmu_tx.c    
(working copy)
@@ -635,7 +635,7 @@
                uint64_t start = off >> shift;
                uint64_t end = (off + len) >> shift;

-               ASSERT(dn->dn_datablkshift != 0);
+               /* XXX may be false alarm: ASSERT(dn->dn_datablkshift != 0); 
XXX */
                ASSERT(dn->dn_indblkshift != 0);

                zio = zio_root(tx->tx_pool->dp_spa,

Though, I am not entirely sure if this will be the final solution.  I'll
double-check with Matt.


...keith
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