kernel-packages team mailing list archive

[Bryan Quigley <bryan.quigley@xxxxxxxxxxxxx>]

So assuming the the value max_sectors_kb is changed to 1024 (with the
2048 kernel command line) that means we need to figure out what the
correct value is for the Avago controller.  Currently it's set as 4096
in the kernel according to C#28.  It appears 1024 works, but if we get
the actual value that's better for performance.

What is the actual hardware limitation of the Avago controller?
If the limit is really 4096 that would imply that it's just broken on PPC64LE which could be another driver or a firmware bug that was only revealed when the default limit was changed from 1024.

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https://bugs.launchpad.net/bugs/1475166

Title:
  Ubuntu 15.04 Install Error with Avago Controller

Status in linux package in Ubuntu:
  Triaged

Bug description:
  Hello Canonical Team

  We are running to an issue installing ubuntu PPC64LE 15.04 full blown
  image on our servers  (with RAID controller).  Installation hangs
  around 70% of progress.

  An important part of our configuration is Avago RAID controller:
  9361-8i Firmware version we used is 4.300.00-4429, and the package is
  24.10.0-0002.

  IMPORTANT: It has to be noted that with same hardware configuration
  14.10 full blown image installs fine.

  Dmesg logs are attached:

  Looking at dmesg logs point out that:
  LSI (avago) driver loads fine
  During further interaction with raid volume during the installation process, firmware errors are seen 
  [  196.991417] megasas: FW status 0x3

  [  196.999376] megasas: FW status 0x3

  [  197.007376] megasas: FW status 0x3
  Further down the  process I/O errors are thrown
  [  217.438664] Buffer I/O error on device sda2, logical block 22052864

  [  217.438671] Buffer I/O error on device sda2, logical block 22052865

  [  217.438678] Buffer I/O error on device sda2, logical block 22052866

  [  217.438686] Buffer I/O error on device sda2, logical block 22052867

  Full dmesg log is attached. Snippet is pasted below highlighting:

  It can be noted that there’s a Mellanox Connectx 3 pro card with some test Firmware on our setup. 
  We can Ignore any diagnostic messages from that card in dmesg logs for the purpose of this bug. 

  Thanks
  Adi Gangidi

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