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Date:      Wed, 31 Jul 2013 21:40:01 GMT
From:      "Christopher D. Harrison" <harrison@biostat.wisc.edu>
To:        freebsd-fs@FreeBSD.org
Subject:   Re: kern/177536: [zfs] zfs livelock (deadlock) with high write-to-disk load
Message-ID:  <201307312140.r6VLe1PS087727@freefall.freebsd.org>

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The following reply was made to PR kern/177536; it has been noted by GNATS.

From: "Christopher D. Harrison" <harrison@biostat.wisc.edu>
To: Martin Birgmeier <Martin.Birgmeier@aon.at>
Cc: bug-followup@FreeBSD.org
Subject: Re: kern/177536: [zfs] zfs livelock (deadlock) with high write-to-disk
 load
Date: Wed, 31 Jul 2013 15:32:02 -0500

 what raidz level are you using: raidz2, raid0, raid1
 also what are the pool config (see below, my pool is called z):
 
 MOS Configuration:
          version: 28
          name: 'z'
          state: 0
          txg: 214028175
          pool_guid: 5334451366918939808
          hostid: 4266313884
          hostname: 'pisces.biostat.wisc.edu'
          hole_array[0]: 3
          vdev_children: 4
          vdev_tree:
              type: 'root'
              id: 0
              guid: 5334451366918939808
              children[0]:
                  type: 'raidz'
                  id: 0
                  guid: 10192098197416954465
                  nparity: 2
                  metaslab_array: 34
                  metaslab_shift: 37
                  ashift: 9
                  asize: 16003083796480
                  is_log: 0
                  create_txg: 4
                  children[0]:
                      type: 'disk'
                      id: 0
                      guid: 5442684633350386182
                      path: '/dev/da3p1'
                      phys_path: '/dev/da3p1'
                      whole_disk: 1
                      DTL: 2318341
                      create_txg: 4
                  children[1]:
                      type: 'disk'
                      id: 1
                      guid: 4184769488943604229
                      path: '/dev/da2p1'
                      phys_path: '/dev/da2p1'
                      whole_disk: 1
                      DTL: 2318340
                      create_txg: 4
                  children[2]:
                      type: 'disk'
                      id: 2
                      guid: 6673578809124996458
                      path: '/dev/da1p1'
                      phys_path: '/dev/da1p1'
                      whole_disk: 1
                      DTL: 2318358
                      create_txg: 4
                  children[3]:
                      type: 'disk'
                      id: 3
                      guid: 14565784372994613264
                      path: '/dev/da0p1'
                      phys_path: '/dev/da0p1'
                      whole_disk: 1
                      DTL: 2318357
                      create_txg: 4
                  children[4]:
                      type: 'disk'
                      id: 4
                      guid: 17127372890035360647
                      path: '/dev/da6p1'
                      phys_path: '/dev/da6p1'
                      whole_disk: 1
                      DTL: 2318356
                      create_txg: 4
                  children[5]:
                      type: 'disk'
                      id: 5
                      guid: 5667576937780231702
                      path: '/dev/label/disk05'
                      phys_path: '/dev/label/disk05'
                      whole_disk: 1
                      DTL: 26389621
                      create_txg: 4
                  children[6]:
                      type: 'disk'
                      id: 6
                      guid: 16545540667878636920
                      path: '/dev/da5p1'
                      phys_path: '/dev/da5p1'
                      whole_disk: 1
                      DTL: 2318354
                      create_txg: 4
                  children[7]:
                      type: 'disk'
                      id: 7
                      guid: 16180883375304336701
                      path: '/dev/da4p1'
                      phys_path: '/dev/da4p1'
                      whole_disk: 1
                      DTL: 2318353
                      create_txg: 4
              children[1]:
                  type: 'raidz'
                  id: 1
                  guid: 7000405778472969514
                  nparity: 2
                  metaslab_array: 32
                  metaslab_shift: 37
                  ashift: 9
                  asize: 16003083796480
                  is_log: 0
                  create_txg: 4
                  children[0]:
                      type: 'disk'
                      id: 0
                      guid: 11848332905648146086
                      path: '/dev/da10p1'
                      phys_path: '/dev/da10p1'
                      whole_disk: 1
                      DTL: 2318352
                      create_txg: 4
                  children[1]:
                      type: 'disk'
                      id: 1
                      guid: 17180048053682905420
                      path: '/dev/da9p1'
                      phys_path: '/dev/da9p1'
                      whole_disk: 1
                      DTL: 2318351
                      create_txg: 4
                  children[2]:
                      type: 'disk'
                      id: 2
                      guid: 14648362260613207535
                      path: '/dev/da8p1'
                      phys_path: '/dev/da8p1'
                      whole_disk: 1
                      DTL: 2318350
                      create_txg: 4
                  children[3]:
                      type: 'disk'
                      id: 3
                      guid: 2512073543886070959
                      path: '/dev/da7p1'
                      phys_path: '/dev/da7p1'
                      whole_disk: 1
                      DTL: 2318349
                      create_txg: 4
                  children[4]:
                      type: 'disk'
                      id: 4
                      guid: 9213113982598250625
                      path: '/dev/da14p1'
                      phys_path: '/dev/da14p1'
                      whole_disk: 1
                      DTL: 2318348
                      create_txg: 4
                  children[5]:
                      type: 'disk'
                      id: 5
                      guid: 14965308070554000358
                      path: '/dev/da13p1'
                      phys_path: '/dev/da13p1'
                      whole_disk: 1
                      DTL: 2318347
                      create_txg: 4
                  children[6]:
                      type: 'disk'
                      id: 6
                      guid: 8812761598924675500
                      path: '/dev/da12p1'
                      phys_path: '/dev/da12p1'
                      whole_disk: 1
                      DTL: 2318346
                      create_txg: 4
                  children[7]:
                      type: 'disk'
                      id: 7
                      guid: 15539718945154864246
                      path: '/dev/da11p1'
                      phys_path: '/dev/da11p1'
                      whole_disk: 1
                      DTL: 2318345
                      create_txg: 4
              children[2]:
                  type: 'raidz'
                  id: 2
                  guid: 12675549095184402399
                  nparity: 2
                  metaslab_array: 30
                  metaslab_shift: 37
                  ashift: 9
                  asize: 16003083796480
                  is_log: 0
                  create_txg: 4
                  children[0]:
                      type: 'disk'
                      id: 0
                      guid: 9157198169193782917
                      path: '/dev/da16p1'
                      phys_path: '/dev/da16p1'
                      whole_disk: 1
                      DTL: 35652327
                      create_txg: 4
                  children[1]:
                      type: 'disk'
                      id: 1
                      guid: 14494767130322696735
                      path: '/dev/da17p1'
                      phys_path: '/dev/da17p1'
                      whole_disk: 1
                      DTL: 2318365
                      create_txg: 4
                  children[2]:
                      type: 'disk'
                      id: 2
                      guid: 17589735305722725561
                      path: '/dev/da18p1'
                      phys_path: '/dev/da18p1'
                      whole_disk: 1
                      DTL: 2318364
                      create_txg: 4
                  children[3]:
                      type: 'disk'
                      id: 3
                      guid: 14307956723966398718
                      path: '/dev/da19p1'
                      phys_path: '/dev/da19p1'
                      whole_disk: 1
                      DTL: 2318363
                      create_txg: 4
                  children[4]:
                      type: 'disk'
                      id: 4
                      guid: 15965579855708087029
                      path: '/dev/da20p1'
                      phys_path: '/dev/da20p1'
                      whole_disk: 1
                      DTL: 2318362
                      create_txg: 4
                  children[5]:
                      type: 'disk'
                      id: 5
                      guid: 760237787742339099
                      path: '/dev/da21p1'
                      phys_path: '/dev/da21p1'
                      whole_disk: 1
                      DTL: 2318361
                      create_txg: 4
                  children[6]:
                      type: 'disk'
                      id: 6
                      guid: 2500372020986714069
                      path: '/dev/da22p1'
                      phys_path: '/dev/da22p1'
                      whole_disk: 1
                      DTL: 2318360
                      create_txg: 4
                  children[7]:
                      type: 'disk'
                      id: 7
                      guid: 4544065732274116075
                      path: '/dev/label/disk24'
                      phys_path: '/dev/label/disk24'
                      whole_disk: 1
                      DTL: 5572568
                      create_txg: 4
              children[3]:
                  type: 'hole'
                  id: 3
                  guid: 0
                  metaslab_array: 0
                  metaslab_shift: 17
                  ashift: 0
                  asize: 0
                  is_log: 0
                  is_hole: 1
 
 On 07/31/13 14:56, Martin Birgmeier wrote:
 > No, this is not an LSI HBA, but rather
 >
 > atapci0:<JMicron JMB361 UDMA133 controller>  port
 > 0xcc00-0xcc07,0xc880-0xc883,0xc800-0xc807,0xc480-0xc483,0xc400-0xc40f
 > mem 0xfe8fe000-0xfe8fffff irq 18 at device 0.0 on pci3
 > atapci1:<AHCI SATA controller>  at channel -1 on atapci0
 > atapci1: AHCI v1.00 controller with 2 3Gbps ports, PM supported
 > ata2:<ATA channel>  on atapci1
 > ata3:<ATA channel>  on atapci1
 > ata4:<ATA channel>  at channel 0 on atapci0
 > atapci2:<ATI IXP700/800 SATA300 controller>  port
 > 0xa000-0xa007,0x9000-0x9003,0x8000-0x8007,0x7000-0x7003,0x6000-0x600f
 > mem 0xfe4ffc00-0xfe4fffff irq 19 at device 17.0 on pci0
 > atapci2: AHCI v1.20 controller with 6 3Gbps ports, PM supported
 > ata5:<ATA channel>  at channel 0 on atapci2
 > ata6:<ATA channel>  at channel 1 on atapci2
 > ata7:<ATA channel>  at channel 2 on atapci2
 > ata8:<ATA channel>  at channel 3 on atapci2
 > ata9:<ATA channel>  at channel 4 on atapci2
 > ata10:<ATA channel>  at channel 5 on atapci2
 > ada0 at ata5 bus 0 scbus3 target 0 lun 0
 > ada1 at ata6 bus 0 scbus4 target 0 lun 0
 > ada2 at ata7 bus 0 scbus5 target 0 lun 0
 > ada3 at ata8 bus 0 scbus6 target 0 lun 0
 > ada4 at ata9 bus 0 scbus7 target 0 lun 0
 > ada5 at ata10 bus 0 scbus8 target 0 lun 0
 >
 > (This is just a simple PC motherboard - ASUS M4A89GTD PRO USB3.)
 >
 > Regards,
 >
 > Martin
 >
 



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