Dick Davies wrote:
> On 04/10/2007, Nathan Kroenert <[EMAIL PROTECTED]> wrote:
>
>   
>> Client A
>>   - import pool make couple-o-changes
>>
>> Client B
>>   - import pool -f  (heh)
>>     
>
>   
>> Oct  4 15:03:12 fozzie ^Mpanic[cpu0]/thread=ffffff0002b51c80:
>> Oct  4 15:03:12 fozzie genunix: [ID 603766 kern.notice] assertion
>> failed: dmu_read(os, smo->smo_object, offset, size, entry_map) == 0 (0x5
>> == 0x0)
>> , file: ../../common/fs/zfs/space_map.c, line: 339
>> Oct  4 15:03:12 fozzie unix: [ID 100000 kern.notice]
>> Oct  4 15:03:12 fozzie genunix: [ID 655072 kern.notice] ffffff0002b51160
>> genunix:assfail3+b9 ()
>> Oct  4 15:03:12 fozzie genunix: [ID 655072 kern.notice] ffffff0002b51200
>> zfs:space_map_load+2ef ()
>> Oct  4 15:03:12 fozzie genunix: [ID 655072 kern.notice] ffffff0002b51240
>> zfs:metaslab_activate+66 ()
>> Oct  4 15:03:12 fozzie genunix: [ID 655072 kern.notice] ffffff0002b51300
>> zfs:metaslab_group_alloc+24e ()
>> Oct  4 15:03:12 fozzie genunix: [ID 655072 kern.notice] ffffff0002b513d0
>> zfs:metaslab_alloc_dva+192 ()
>> Oct  4 15:03:12 fozzie genunix: [ID 655072 kern.notice] ffffff0002b51470
>> zfs:metaslab_alloc+82 ()
>> Oct  4 15:03:12 fozzie genunix: [ID 655072 kern.notice] ffffff0002b514c0
>> zfs:zio_dva_allocate+68 ()
>> Oct  4 15:03:12 fozzie genunix: [ID 655072 kern.notice] ffffff0002b514e0
>> zfs:zio_next_stage+b3 ()
>> Oct  4 15:03:12 fozzie genunix: [ID 655072 kern.notice] ffffff0002b51510
>> zfs:zio_checksum_generate+6e ()
>> Oct  4 15:03:12 fozzie genunix: [ID 655072 kern.notice] ffffff0002b51530
>> zfs:zio_next_stage+b3 ()
>> Oct  4 15:03:12 fozzie genunix: [ID 655072 kern.notice] ffffff0002b515a0
>> zfs:zio_write_compress+239 ()
>> Oct  4 15:03:12 fozzie genunix: [ID 655072 kern.notice] ffffff0002b515c0
>> zfs:zio_next_stage+b3 ()
>> Oct  4 15:03:12 fozzie genunix: [ID 655072 kern.notice] ffffff0002b51610
>> zfs:zio_wait_for_children+5d ()
>> Oct  4 15:03:12 fozzie genunix: [ID 655072 kern.notice] ffffff0002b51630
>> zfs:zio_wait_children_ready+20 ()
>> Oct  4 15:03:12 fozzie genunix: [ID 655072 kern.notice] ffffff0002b51650
>> zfs:zio_next_stage_async+bb ()
>> Oct  4 15:03:12 fozzie genunix: [ID 655072 kern.notice] ffffff0002b51670
>> zfs:zio_nowait+11 ()
>> Oct  4 15:03:12 fozzie genunix: [ID 655072 kern.notice] ffffff0002b51960
>> zfs:dbuf_sync_leaf+1ac ()
>> Oct  4 15:03:12 fozzie genunix: [ID 655072 kern.notice] ffffff0002b519a0
>> zfs:dbuf_sync_list+51 ()
>> Oct  4 15:03:12 fozzie genunix: [ID 655072 kern.notice] ffffff0002b51a10
>> zfs:dnode_sync+23b ()
>> Oct  4 15:03:12 fozzie genunix: [ID 655072 kern.notice] ffffff0002b51a50
>> zfs:dmu_objset_sync_dnodes+55 ()
>> Oct  4 15:03:12 fozzie genunix: [ID 655072 kern.notice] ffffff0002b51ad0
>> zfs:dmu_objset_sync+13d ()
>> Oct  4 15:03:12 fozzie genunix: [ID 655072 kern.notice] ffffff0002b51b40
>> zfs:dsl_pool_sync+199 ()
>> Oct  4 15:03:12 fozzie genunix: [ID 655072 kern.notice] ffffff0002b51bd0
>> zfs:spa_sync+1c5 ()
>> Oct  4 15:03:12 fozzie genunix: [ID 655072 kern.notice] ffffff0002b51c60
>> zfs:txg_sync_thread+19a ()
>> Oct  4 15:03:12 fozzie genunix: [ID 655072 kern.notice] ffffff0002b51c70
>> unix:thread_start+8 ()
>> Oct  4 15:03:12 fozzie unix: [ID 100000 kern.notice]
>>     
>
>   
>> Is this a known issue, already fixed in a later build, or should I bug it?
>>     
>
> It shouldn't panic the machine, no. I'd raise a bug.
>
>   
>> After spending a little time playing with iscsi, I have to say it's
>> almost inevitable that someone is going to do this by accident and panic
>> a big box for what I see as no good reason. (though I'm happy to be
>> educated... ;)
>>     
>
> You use ACLs and TPGT groups to ensure 2 hosts can't simultaneously
> access the same LUN by accident. You'd have the same problem with
> Fibre Channel SANs.
>   
I ran into similar problems when replicating via AVS.

benr.
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