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[Mauricio Faria de Oliveira <mauricfo@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

Hi Canonical,

Please apply this kernel commit for Trusty SRU / 14.04.x (already in 14.10, 15.04, and later):
- 27f344eb15dd0da80ebec80c7245e8c85043f841 lpfc: Add iotag memory barrier

Tested on top of linux 3.13.0-55.94 (applies cleanly; cherrypick)

It fixes the this issue w/ the lpfc driver, seen under I/O stress.

(In reply to comment #12)
> [  177.972210] lpfc 0000:00:05.0: 0:0369 No entry from fast-path completion
> queue fcpcqid=1
> [  355.950403] lpfc 0000:00:04.0: 1:0372 iotag x85d is out off range: max
> iotag (xa10)
> [  421.007268] lpfc 0000:00:04.0: 1:(0):0748 abort handler timed out waiting
> for abortng I/O (xri:xdf7) to complete: ret 0x2003, ID 0, LUN 2
> [  421.008177] lpfc 0000:00:04.0: 1:(0):0727 TMF FCP_LUN_RESET to TGT 0 LUN
> 2 failed (1, 4096) iocb_flag x6
> [  421.008309] lpfc 0000:00:04.0: 1:(0):0713 SCSI layer issued Device Reset
> (0, 2) return x2002
> [  481.017214] lpfc 0000:00:04.0: 1:(0):0724 I/O flush failure for context
> LUN : cnt x1
> [  481.019292] lpfc 0000:00:04.0: 1:(0):0727 TMF FCP_TARGET_RESET to TGT 0
> LUN 2 failed (1, 4096) iocb_flag x6
> [  481.019398] lpfc 0000:00:04.0: 1:(0):0723 SCSI layer issued Target Reset
> (0, 2) return x2002
> [  541.027198] lpfc 0000:00:04.0: 1:(0):0724 I/O flush failure for context
> TGT : cnt x1
> [  541.029168] lpfc 0000:00:04.0: 1:(0):0727 TMF FCP_TARGET_RESET to TGT 0
> LUN 0 failed (1, 4096) iocb_flag x6
...
> [  601.037193] lpfc 0000:00:04.0: 1:(0):0724 I/O flush failure for context
> HOST : cnt x1
> [  601.037291] lpfc 0000:00:04.0: 1:(0):0714 SCSI layer issued Bus Reset
> Data: x2003
> [  601.037388] lpfc 0000:00:04.0: 1:(0):3172 SCSI layer issued Host Reset
> Data:
> [  603.560526] lpfc 0000:00:04.0: 1:1303 Link Up Event x1 received Data: x1
> x0 x80 x0 x0 x0 0
> [  612.687916] sd 2:0:0:0: timing out command, waited 30s
> [  612.689217] sd 2:0:0:1: timing out command, waited 30s
> [  612.690407] sd 2:0:0:3: timing out command, waited 30s
> [  612.694220] sd 2:0:0:4: timing out command, waited 30s
> [  634.667144]  rport-2:0-4: blocked FC remote port time out: removing rport

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: patch

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https://bugs.launchpad.net/bugs/1468416

Title:
  [Trusty SRU] patch for "lpfc: iotag is out of range: max iotag"

Status in linux package in Ubuntu:
  New

Bug description:
  Hi Canonical,

  Please apply this kernel commit for Trusty SRU / 14.04.x (already in 14.10, 15.04, and later):
  - 27f344eb15dd0da80ebec80c7245e8c85043f841 lpfc: Add iotag memory barrier

  Tested on top of linux 3.13.0-55.94 (applies cleanly; cherrypick)

  It fixes the this issue w/ the lpfc driver, seen under I/O stress.

  (In reply to comment #12)
  > [  177.972210] lpfc 0000:00:05.0: 0:0369 No entry from fast-path completion
  > queue fcpcqid=1
  > [  355.950403] lpfc 0000:00:04.0: 1:0372 iotag x85d is out off range: max
  > iotag (xa10)
  > [  421.007268] lpfc 0000:00:04.0: 1:(0):0748 abort handler timed out waiting
  > for abortng I/O (xri:xdf7) to complete: ret 0x2003, ID 0, LUN 2
  > [  421.008177] lpfc 0000:00:04.0: 1:(0):0727 TMF FCP_LUN_RESET to TGT 0 LUN
  > 2 failed (1, 4096) iocb_flag x6
  > [  421.008309] lpfc 0000:00:04.0: 1:(0):0713 SCSI layer issued Device Reset
  > (0, 2) return x2002
  > [  481.017214] lpfc 0000:00:04.0: 1:(0):0724 I/O flush failure for context
  > LUN : cnt x1
  > [  481.019292] lpfc 0000:00:04.0: 1:(0):0727 TMF FCP_TARGET_RESET to TGT 0
  > LUN 2 failed (1, 4096) iocb_flag x6
  > [  481.019398] lpfc 0000:00:04.0: 1:(0):0723 SCSI layer issued Target Reset
  > (0, 2) return x2002
  > [  541.027198] lpfc 0000:00:04.0: 1:(0):0724 I/O flush failure for context
  > TGT : cnt x1
  > [  541.029168] lpfc 0000:00:04.0: 1:(0):0727 TMF FCP_TARGET_RESET to TGT 0
  > LUN 0 failed (1, 4096) iocb_flag x6
  ...
  > [  601.037193] lpfc 0000:00:04.0: 1:(0):0724 I/O flush failure for context
  > HOST : cnt x1
  > [  601.037291] lpfc 0000:00:04.0: 1:(0):0714 SCSI layer issued Bus Reset
  > Data: x2003
  > [  601.037388] lpfc 0000:00:04.0: 1:(0):3172 SCSI layer issued Host Reset
  > Data:
  > [  603.560526] lpfc 0000:00:04.0: 1:1303 Link Up Event x1 received Data: x1
  > x0 x80 x0 x0 x0 0
  > [  612.687916] sd 2:0:0:0: timing out command, waited 30s
  > [  612.689217] sd 2:0:0:1: timing out command, waited 30s
  > [  612.690407] sd 2:0:0:3: timing out command, waited 30s
  > [  612.694220] sd 2:0:0:4: timing out command, waited 30s
  > [  634.667144]  rport-2:0-4: blocked FC remote port time out: removing rport

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