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To: Mike Smith <msmith@FreeBSD.ORG>
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Subject: Re: 3ware problems 
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Since I've spent the weekend grasping for straws, I thought I'd
upgrade to the latest MySQL server. Nothing in the changelog
suggested that it'd fix anything, and it didn't: It still hangs. Here
is the transaction off the busy queue:

twe0: status   570074d0<CQEMPTY,UCREADY,RQEMPTY>
twe0:           current  max
twe0: free      0099     0100
twe0: ready     0000     0000
twe0: busy      0001     0100
twe0: complete  0000     0012
twe0: bioq      0000     0029
twe0: AEN queue head 1  tail 0
twe0: busy queue: 1 entries
twe0: CMD: request_id 52  opcode <WRITE>  size 11  unit 0  host_id 0
twe0:  status 0  flags 0x0  count 32  sgl_offset 3
twe0:  lba 78075746
twe0:   0: 0x10d54000/4096
twe0:   1: 0xd775000/4096
twe0:   2: 0xcb96000/4096
twe0:   3: 0x11d97000/4096
twe0:  tr_command 0xc1520c00/0x174f4c00  tr_data 0xce094000/0x10d54000,16384
twe0:  tr_status 1  tr_flags 0x2  tr_complete 0xc011f1b0  tr_private 0xc926001c

And from an earlier wedge that I haven't reported to the list before:

twe0: status   57007520<CQEMPTY,UCREADY,RQEMPTY>
twe0:           current  max
twe0: free      0099     0100
twe0: ready     0000     0000
twe0: busy      0001     0100
twe0: complete  0000     0013
twe0: bioq      0000     0029
twe0: AEN queue head 1  tail 0
twe0: busy queue: 1 entries
twe0: CMD: request_id 52  opcode <WRITE>  size 7  unit 0  host_id 0
twe0:  status 0  flags 0x0  count 16  sgl_offset 3
twe0:  lba 177824626
twe0:   0: 0x4f2c000/4096
twe0:   1: 0x814d000/4096
twe0:  tr_command 0xc1520c00/0x174f4c00  tr_data 0xcaccc000/0x4f2c000,8192
twe0:  tr_status 1  tr_flags 0x2  tr_complete 0xc011f1b0  tr_private 0xc92e6124

And the original transaction I posted about 5 days ago:

db> call twe_printqueues 
twe0: status   57007310<CQEMPTY,UCREADY,RQEMPTY,>
twe0:           current  max
twe0: free      0099     0100
twe0: ready     0000     0000
twe0: busy      0001     0100
twe0: complete  0000     0009
twe0: bioq      0000     0021
twe0: AEN queue head 1  tail 0
twe0: busy queue: 1 entries
twe0: CMD: request_id 54  opcode <WRITE>  size 11  unit 0  host_id 0
twe0:  status 0  flags 0x0  count 32  sgl_offset 3
twe0:  lba 177770466
twe0:   0: 0xffc4000/4096
twe0:   1: 0x11f85000/4096
twe0:   2: 0x12d66000/4096
twe0:   3: 0x10e87000/4096
twe0:  tr_command 0xc1520400/0x174f4400  tr_data 0xce0f4000/0xffc4000,16384
twe0:  tr_status 1  tr_flags 0x2  tr_complete 0xc011f1b0  tr_private 0xc9260400

After quite a bit of hassle, I've got remote GDB going, and I've poked
around the data structures, but I haven't found out anything. (GDB is
*so* much friendlier than DDB!) So if you, or anybody, have
suggestions for poking around, I'd be happy to do them.

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